Intel Puma 6 Modem List Chipset Defects

Welcome to the Intel Puma 6 modem list chipset defects explanation page. Below you will find information on what the Puma 6 problem is, the modems to avoid purchasing, and the class action lawsuit.

Click here to jump to the Do Not Buy Intel Puma 6 modem list.

Intel Puma 6 Defect Explained

Do Not Buy Intel Puma 6 Modem List Logo
Do Not Buy Intel Chipset Modems

Intel’s Puma 6 chipset included in several cable modems is defective as it allows high spikes in network latency quite often (slow web page loading, for example). These severe network latency spikes interfere with online gaming, streaming video, or simply surfing the web. Network jitter (variable latency) also causes problems.

The Puma 6 modems suffer from both latency and jitter. Some firmware updates have only temporarily fixed the problem and it seems Intel has no real fix for the issue. Consequently, these bad internet connections landed cable modem maker ARRIS in trouble with a pending lawsuit filed in California.

Puma 6 Defect Lawsuit

The Schubert Jonckheer & Kolbe law firm has begun an investigation into the issues and has filed a class action lawsuit for consumers of affected modems. If you own one of the affected modems (listed below), you can file your issues and get alerts to any possible legal action against Intel and the cable modem brands (particularly ARRIS). On the Schubert Jonckheer & Kolbe Puma 6 Chipset Defect page, you can check out the full lawsuit details.

Easiest Way to Spot a Defective Puma 6 Modem

ARRIS SB6190 Intel Puma 6 Modem List
See this Intel logo on a modem package? Avoid buying these potentially defective modems.

Looking at the cable modem package is the easiest way to find if a modem is potentially defective. If you see an Intel logo on the box, stay away from it. Reports of the Puma 7 chipsets may also be defective, so the best thing to do is avoid any cable modem with Intel inside.

Note: not all Intel Puma chipset modems will have an Intel logo on the front of the modem package.

Some bad modems like the NETGEAR CM700 and NETGEAR C6300 do not have Intel logos on the front of their modem packages. Therefore, read the Intel Puma 6 modem list below to avoid purchasing a possibly defective modem.

While Intel has issues with the Puma chipsets, Broadcom chipsets (produced by Broadcom Inc.) suffer no connection problems at all. For example, you can feel safe using a modem like the Motorola MB7621 or NETGEAR CM600 as those devices use a Broadcom chipset.

Intel Puma 6 Modem List – Do Not Buy These Cable Modems

Do not buy these modems to avoid current and future problems with the Intel Puma chipsets. This list contains residential modems, business modems, and non-certified modems (ISPs may not not approve these devices in your local region). Intel Puma 7 chipset modems are also included in the list.

ARRIS TG2472 (TG2472G)
Cisco DPC3848
Cisco DPC3848V
Compal Broadband Networks CH7466
FRITZ!Box 6430
FRITZ!Box 6460
FRITZ!Box 6490
FRITZ!Box 6590
Hitron CDA-32372
Hitron CDE-32372
Hitron CDA3
Hitron CDA3-20
Hitron CDA3-35
Hitron CGN3
Hitron CGN3ACR
Hitron CGN3AMF
Hitron CGN3AMR
Hitron CGN3M35
Hitron CGNM-2250
Hitron (CGNM) CGNM-2252
Hitron CGNM-3550
Hitron CGNM-3552
Hitron CGNV4
Hitron CGNVM-2559
Hitron CGNVM-3580
Hitron CGNVM-3582
Hitron CGNVM-3589
Hitron CHITA
Hitron CODA
Hitron CODA D3.1
Hitron CODA-45
Hitron CODA-4502
Hitron CODA-4580
Hitron CODA-4582
Hitron CODA-4589
Hitron CODA-46
Hitron CODA-4602
Hitron CODA-4680
Hitron CODA-4682
Hitron CODA-4689
Hitron CODA-47
Hitron CODA-4702
Hitron CODA-4780
Hitron CODA-4782
Hitron CODA-4789
Hitron CODA-5519
Hitron E31N2V1
Hitron EN2251
Linksys CG6350
Linksys CG7500
Linksys CM3016
Linksys CM3024
Samsung Home Media Server
SMC D3G2408
Technicolor TC4350
Virgin Media Super Hub 3 (ARRIS TG2492LG-VM or VMDG505 or Compal Broadband Networks CH7465)
XFINITY XB3 (ARRIS TG1682G, Cisco DPC3939, Cisco DPC3941B, Cisco DPC3941T)

Note: the XFINITY XB6-T (Technicolor CGM4140COM) uses a Broadcom chipset, it is safe
Note: the XFINITY XB7 (Technicolor CGM4331COM) uses a Broadcom chipset, it is safe

Is a modem missing on this list? Please leave a comment below.

Intel Puma 6 Modem List Chipset Defects Reaction will no longer recommend any Intel Puma 6 or 7 chipset cable modems on this site. However, to show complete approved modem lists for each internet service provider, modems listed for each company may contain bad modems too. will display warnings for potentially defective Puma chipset modems.

While one of the Do Not Buy modems may work fine for your use, using a device known to have a serious issue involves risk. The cable modem may work properly for a few weeks and then problems could occur later. Skip any potential problems now and go with another approved cable modem for your internet service provider (without Intel inside).

Approved Modems Helpful Resources

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113 thoughts on “Intel Puma 6 Modem List Chipset Defects”

    • Thanks exboxnick for the info.

      Yes, they are bad Intel Puma modems and they have been added to the list above.

      Thank you for the input, exboxnick. If you see anything else that should be addressed, please reply.

      • Cox DOES support the TG2472 (Puma6 chipset) in some locations.
        According to Cox you have to be sure of its provenance (that it isn’t stolen) before they will initialize it…but they DO SUPPORT IT and it is on their supported cable-modems page for the area I’m in.

        The TG2472 is not listed in your “approved” list, but is included in the list above.

        • Thanks John for the reply, but the TG2472 is on the Cox approved modems list and is marked as a Do Not Buy device. Maybe you just missed seeing it on the list (or maybe you were looking at a different ISP approved modem list).

          Cox Approved Modems

        • To warn others as well…Cox just installed the Arris TM3402 at my 94 yr. old mom’s house — she lives alone. I’m LIVID at being forced to relinquish the stability and reliability of a hard-wired analog line to conform to the FCC’s directive of everything digital! Put every egg in one basket and just watch when it fails! And, less than 24 hours later it already has. That’s “progress” for ya? To me that’s substandard and in our case a serious safety issue.

          So now we have a piece of garbage to boot as a modem that accommodates it (not our choice either). It was installed on Sunday afternoon…on Monday morning it had intermittent static in the lines and was found to have “gone down” already without explanation from Cox. “We don’t know why…but it’s back up now.” Gee…thanks! So…I’m back out there for yet ANOTHER appointment with Cox to try to address this unreliable, unwanted bit of crap!

          Seems like every time government sticks their noses into things they choose to manipulate “for our own good,” we all get screwed. Funny how that is…

      • Thank you for the reply! You’re right, they do not appear here

        Those modems I listed are specifically sent out by Comcast Business and we encounter these devices all the time. Comcast has been replacing older Ubee model modems and Netgear CG3000DCR modems with these Cisco/Technicolor devices to offer their gateway and services too.

        For anyone who may have issues with their business, maybe, can refer to the URL.

    • I got my model replaced by WOW, and they shipped me an ARRIS TG2472G. TG2472 is on the Puma 6 list, and it appears that this is yet another defective Puma 6 modem, but that specific model isn’t on your list.

      • Hi Daniel,

        Some companies only list the ARRIS TG2472G as TG2472, so to clarify it for everyone, both models numbers are now listed. It is the same device however. Thanks for the info.

        Stay safe, Daniel.

    • Thank you, exboxnick.

      After much research, you are correct. The NETGEAR CBR40 Orbi Cable Router is indeed an Intel Puma chipset. For those curious to see what an Intel Puma chipset looks like, you may view it on the following link. Notice the DHCE2604 number and the “i” logo, which is an indicator of an Intel Puma chipset.

      NETGEAR CBR40 Intel Puma Chipset Image

      Word of caution on the linked paged you posted, exboxnick. Since it is a wiki site, anybody can edit those pages, so the information may not be correct for every device.

      Thanks, exboxnick, for posting a correction to the Puma chipset defect list.

    • No, Javed, avoid the ARRIS SBG10 as it contains an Intel Puma chipset. The best modem to buy will depend on the ISP you have. Please see your ISP page on this site to determine the best modem for your use.

  1. Charter/Spectrum/Time Warner Western NY.
    To the best of my knowledge, all approved modems use the Puma 6 chipset, including the company supplied ones.
    They are in no hurry to test any modems for the 400mbs to gig tier because they supply their own modems.
    So what is a safe modem to purchase?

    • Hello EvilWizardGlick,

      Not all approved modems for Charter contain the Intel Puma 6 chipset. You may view the Charter approved modem list and see the devices that do not contain the bad chipsets (pick any modem that does not have a black diamond ♦ next to the modem number).

      Even though Charter is the second largest cable internet provider, it takes them months, if not years, to approve modems. It is insane how slow they are at certifying modems. Yes, it may be several more months before Charter approves any DOCSIS 3.1 modems for 1 Gbps speeds.

      Charter has a Minimally Qualified Modems list, but the company actually states they are not recommended “because they haven’t been tested to confirm their ability to deliver your purchased internet service speed.” The full list is below. The NETGEAR CM1000 is a DOCSIS 3.1 modem, but as Charter has stated, your internet speed will be an issue.

      ARRIS SB8200
      ARRIS SB6183v2
      ARRIS SBG10
      ARRIS SBG6950
      ARRIS SBG6950 AC2
      ARRIS SBG7400
      ARRIS SBG7400 AC2
      ARRIS SBG7600
      ARRIS SBG8300
      Linksys CG7500
      Linksys CM3016
      Motorola MB8600
      Motorola MG7700
      NETGEAR C3000v2
      NETGEAR C3700v2
      NETGEAR C6220
      NETGEAR C6300-100NAS
      NETGEAR C6300v2
      NETGEAR C6300 D0
      NETGEAR C7000
      NETGEAR C7000v2
      NETGEAR C7500
      NETGEAR C7500 D0
      NETGEAR C7800
      NETGEAR Cable Orbi CBR40 or CBK40
      NETGEAR N450
      NETGEAR N450-100NAS
      NETGEAR N450 CG3000Dv2
      NETGEAR CM1000
      NETGEAR CM1000v2
      NETGEAR CM1100
      NETGEAR CM1200 V1
      NETGEAR CM1200-100NAS
      TP-Link CR1900
      TP-Link TC7650
      Zoom 5370

  2. The Arris CM3200/3200ashould be on this list as was a confirmed puma chipset issue previously by several large cable providers.A little research online confirms this.

    • Thanks cablesatguy.

      The ARRIS CM3200 has been added to the list. Currently only Armstrong has approved that modem. Nice catch cablesatguy!

  3. Didn’t Intel release firmware that resolves the Puma chipset? Technically the bad modems should be fine, right?

    I am currently searching for a new modem as I am having to use spectrum due to cost efficient. I am coming from Google Fiber. $144 to $71

    • Yes, some firmware updates have been released, however not every issue has been resolved. Plus, any future firmware updates may reverse any fixes, or even make the issues worse.

      It is just best to stay away from anything with an Intel Puma chipset for a hassle-free experience today and for the future.

      Thanks, bradleyp.

  4. My Cable company that i will leave unnamed until i am fully enraged with, has basically provided me a Modem that the united states website for the company no longer provide. It is the Hitron-3582 and it doesn’t appear to be on the actual lawsuit against Intel. Does anybody have any recommendations ? I am trying to get these *edit* to actually get current equipment from Hitron, instead of some i swear to god imported from over the border and trying to avoid getting sued over. If the cable company specifically already knows of this and avoiding it, they are just as liable and i’m wanting my high speed internet to be high speed for real if you get what i mean. any help or advice appreciated

    • What is the name of your Internet provider?

      You really want to avoid anything from Hitron as most of their devices use Intel Puma chipsets. You should try a different brand if possible.

  5. Greetings,
    I’m so happy to have stumbled upon your web site. I cant even tell you how I got hear as I’ve been searching for answers for 3 hours tonight.

    I live in a canyon along the Pacific coastline in So Cal and am serviced by COX. I have no other choices or options. I was mandated by COX to upgrade my modem as they’re changing all telephone systems from analog/ copper wire to VOIP. As such I was forced to accept their modem, an ARRIS TM3402A. At the time I decided to upgrade and modernize my wifi system and chose the
    Linksys VELOP mesh 3 node system.
    The VELOP system is easy and connected seamlessly with the ARRIS TM3402A modem. Everything was hunky-dory for 2 weeks……..then it happened. Without changing a thing the ARRIS Modem simply dumped my VELOP wifi and refused to communicate or play nice.

    I’ve contacted COX on 4 different occasions over the past two months. During that time I’ve spent 9hrs on the phone and’ve been visited by 3 different Techs. Like Bill Murray in Ground Hogs Day, the same thing happens each and every time. Suffice it to say COX either doesn’t know how to fix their issue, or refuses to be honest and admit they don’t know why it arbitrarily disconnects the wifi anywhere from 20 mins to 48 hours after complete reboot of both systems.

    Tonight in my quest to ‘find a cure’ I found your site. On your site I discovered the COX Modem (ARRIS TM3402A) is on your Intel PUMA chip list with a big warning “Do Not Buy”.
    Can you tell me if my modems ‘self disconnecting’ issues could be in direct correlation to the Bad PUMA chip set?
    Have I stumbled into discovering the crux’s of my 60 day frustration?
    Are you the one web site of insightful and experienced tech types who are actually saving us common folk?…..

    • First, LA-Gaffer, sorry for all the frustration with your device. It is really disappointing when something just does not work.

      Second, yes, using an Intel Puma device will cause issues with connectivity. You should certainly be purchasing a new non-Puma modem to maintain a solid connection to the internet. You can find Cox approved modems here (Intel Puma chipset modems are clearly marked, so you know which modems to avoid). Good luck, LA-Gaffer.

  6. I have (hopefully) one last inquiry for you guys! Technicolor CGA4131. There seem to be 3 or 4 different variations that I can find, CGA4131COM (CBR-T) for Comcast, CGA4131TCH for Mediacom, and CGA4131 for Cox and a TBR (still CGA4131)?

    Any insight is much appreciated as I have received a handful of reports for each, and some worked while others reported minimal improvement over past Intel Puma 6 devices.





    • Cablesatguy, it is too early for this type of identification. Yes, people should be aware of the issue, but unlike the Intel Puma chipset issues, Cable Haunt seems like a problem that can be fixed with a firmware update. The Intel Puma chipset disaster has been ongoing for years with no real fix and a pending lawsuit.

      This is certainly something to keep an eye on. For those that want significantly more information on the possible affected modems (most affected modems are outside of the USA region), you can visit the Cable Haunt website. Their site lists possible affected modems and a tool (Test Script) to test your own modem. Hopefully, future firmware updates are quick and actually fix the vulnerability.

      Thanks, Cablesatguy, for bringing attention to this new vulnerability.

  7. I recently got my service switched from AT&T/DirecTV to Spectrum. They gave me an ARRIS TM1602 modem which I believe is on the “Do not use list”, and I am definitely experiencing lag and buffering when streaming Netflix, Prime Video, Disney + and other streaming services, despite having “400Mbps” service from Spectrum.

    After reading this forum, would the NETGEAR CM600, which is approved by Spectrum for 400mbps use, be a good replacement to their “rental” modem? I want to avoid anything with the Puma chips. Also, does the NETGEAR CM700, which is also approved and can handle 500Mbps, work as well?

    • Hello Rdefazio,

      Avoid the NETGEAR CM700 as that contains an Intel Puma chipset. The NETGEAR CM600 would be an excellent modem upgrade for you (no Puma chipset).

      You can find more information on Spectrum approved modems here. If you need phone service, you are stuck with the ARRIS TM1602 because Spectrum does not approve of VoIP modems other than what they give to you.

  8. I have ARRIS SBG6950AC2. I noticed that the surfboard shows any device like cellphone consoles amd so but sometimes the surfboard don’t show anything but still connected devices I had add for wifi. Should I get rid of ARRIS SBG6950AC2 and if so what would be a good basic cable modem I can used with my netgear wifi?

  9. Having problems with Arris TG2492 in bridge mode, more than 500 connections and it chokes, don’t think I have seen it in the list but it uses that same Intel chip.

    • You are correct, the ARRIS TG2492 contains an Intel Puma 6 chipset. The TG2492 has been added to the list. Thanks, Spear, for pointing out this bad cable gateway device.

  10. I recently just got a Nighthawk X6 R8000 (ac3200) router, I used to have an Apple Airport Extreme. My internet service provider is Cox, I have their 300Mbps download / 30 Mbps upload plan, as well as having their phone plan. They provided me their Arris TM3402 modem and I was indeed having ping and latency issues, I thought the issue was with my new router but then I came across this website. I already called Cox and they are going to swap out this defective modem for the Technicolor CGM4141 modem. I just want to make sure if this is safe to buy and I want to know what chipset is in this Technicolor CGM 4141 modem.

  11. Thanks for this website!

    Purchased a Netgear CM700 along with a new Nest Wi-Fi to replace an aging Surfboard SBG6580.

    Upon gaming/streaming video o noticed dropouts and lag.

    Gaming was the worst, so much lag.

    “Downgraded” to the Netgear CM 600 and, WOW! It made such a difference. Gaming is smooth as well as no more buffering and dropped resolution on videos.

    Keep up this awesome knowledge base!

    • Thanks for your comment, Drew. Glad you found this site useful! Gamers should definitely avoid Intel Puma chipset modems.

    • That is an excellent question, Carlos! Best Buy shows an image of the Intel logo. Carlos, did you see it in store or online?

      This is concerning if the image is correct as why would ARRIS switch to a chipset that is known to have issues; the Broadcom chipset was perfectly fine. ARRIS still shows the non-Intel packaging on their site. Maybe Best Buy has a photoshopped image?

  12. Hello, I’m having a bit of a problem here.

    I’m using a netgear cm600 and a r7000p router, yet I’m having the same issues that people are attributing to this chipset. AFAIK neither of these have it

    • Hello Alex D,

      The NETGEAR CM600 is definitely a safe modem to use (no Intel Puma chipset). The first step is to only use your modem to see if you have connection issues. It may be time for a new router.

      Another step you can try – go to this Bad Modems site and use the tool to check for latency and jitter. There is information on that page that explains what you are looking for to help determine the issues you are having. Good luck, Alex D!

  13. While I was shopping around for an internet plan today on Optimum’s website for my new address it mentioned that only the following three modems would be on their approved list if I wanted to bring my own:

    * Arris TM 1602
    * Arris TG 1672G
    * Arris TM 3202A

    I see the TG1672 is on the do not buy list. is the TG1672G considered the same device or is it a separate device and not on the list?


  14. This is an awesome site!!!! I understand next to nothing about modems and routers and I am so happy to read about all these different modems and the problems to avoid.
    You did ask for missing devices from your list and in reading the comments I found a couple, although I do not know if they are considered “USA Region Residential Modems”, remember my lack of adequate education in this area:
    the ARRIS TG1672 and TG1672G are considered to be the same device & were recommended to avoid.
    The ARRIS TG2492 was also identified as one not to purchase
    Thanks again for your very informative and helpful information here!!!

  15. I don’t wish to increase clutter but it would be nice if business modems were included in the list

    Thankfully a Ctrl+F does list the modems in comments but a more complete list helps

    Spectrum requires a business account even in residential homes just for a static IP, something residential customers cannot get

    Also alot of my business customers use cloud based services like file storage, security systems, and payment systems, all which will fail,timeout,error out, or freeze up due to puma6 packet drops, connection drops, and other issues. I think it’s very important since a few business ISP’s(spectrum) will now start swapping modems at customer request to a 16×4 or a 24×8 modem they currently have for businesses to remove the puma6 units, most people don’t even know they have a modem issue, they just know it’s an “issue” and spectrum won’t swap modems without customer request

    • Business modems have now been added to the list. Some business modems are just repeats of residential modems. So, the suggestion is to try to use a residential modem that can also be used for business that is not on the bad Intel Puma chipset list.

      • Thankyou. Sadly as mentioned most business customers cannot use their own modem and have to use ISP supplied so you have to play the modem game with them. The good news is many times they indeed are just repeat modems. Your list even so has been an incredible help!

        • Even though not often on any list: If a prior model or lower channel modem is on the list for a ISP for a given manufacturer, tell the ISP to chose “the first one on the list” in order to get past the “script” that operators have to follow. When you do this, or if you use auto/self-service activation/provision, successful provisioning will usually occur.

          The difference between “business” and “residential” for most ISPs is an unfortunate game, that is only implemented in the script that the operators are instructed to follow. There is no difference in hardware implementation, nor TFTP binary transmission (on a manufacturer basis that is). Just chose the most basic model of a manufacturer that the ISP has supported in the current or past, and provisioning will usually work.

          For instance, in SW MI COMCAST: Arris TM822 can be activated under Arris SB6141, even though the latter is not the same chip nor origin nor year nor feature set. But everything / all features will work. This is again because the ISP supported the Arris origin and the TM7x + TM8x chips in the 2000s. Thus the current TFTP assigned binaries + config files will be inter-operable with the “SB6141” selection (in reality, the endpoint talks to the server, and selects the correct binary + the account configuration, and ignores the “script” followed by the ISP support staff). Been using this method for 10yrs.


  16. I have a Netgear C6300 (I bought 2 years ago) and now I having problems… Download: 200mb (great) but Upload: 0.8mb ( and most to be around 10 and 13mb) sometimes I getting disconected from my wifi.

  17. Hi am having latency issues with my internet I have a cable wifi modem Xfinity. After complaining of having speed issues during my 3 yrs of service. I had a supervisor offer me a $35 mnth discount on my current bill for 24 mnths to upgrade me from 600mbps triple play package to triple play 1gig service. (No phone installed)

    Turns out after talking to Xfinity and having Arris warranty upgrade replacement from my Arris-SBG7580AC that I discovered is on the Bad Intel PUMA Chipset list. The replacement upgrade they are sending Arris SBG7600AC2 is also on the list (lol you gotta be kidding) So I’ve spent a good bit of time trying to find a nice DOCSIS 3.1 modem w/built in WI-F1 that can handle approved 1 gig speeds for under $200…. There are none. So I’m going old school Modem with a Wireless Router.

    I want to know what modem you’d recommend with the TP-Link AC1750 Smart WiFi Router – Dual Band Gigabit. I’m looking at the ARRIS Surfboard SB8200-Rb or Netgear Nighthawk CM1100?

    • Hi Edwin,

      You can’t go wrong with either modem you listed. The ARRIS SB8200 is ARRIS’s best modem (one of the few ARRIS modems that does not contain the Intel Puma chipset). You listed the SB8200-Rb (meaning refurbished). Be aware some people have issues with pre-owned devices not being deactivated from a previous user’s account, so you may have to wrestle with the ISP if that is the case for you.

      The NETGEAR CM1100 is also an excellent option (no Intel Puma chipset). Some modems are difficult to find in stock due to COVID-19 affecting manufacturing capabilities in the market at this time. So, if you find a modem you like, you should jump on it. The ARRIS SB8200 has been on the market longer so it has had more time for people to experiment with the device.

  18. Thanks for your site, I have used it many times to avoid Intel chipset. This time around I took a gamble and renting an XB7 from Xfinity. It shows on my account they are sending me an XB7-T CGM4331COM which I am excited to see is on the approved list of NOT being Intel. What a relief! Keep up the good work!

    • Since the Ubee EU2251 seems to be exclusive to Spectrum, there is not a lot of info on this device. There are a couple of references to Broadcom chipsets on other sites (listed below). Not even the FCC database was much help since the EU2251 does not use WiFi (FCC only lists modems with WiFi). Closest device found was the Ubee E31U2V1 (one of the model numbers listed on the data sheet, but no chipset pictured). At least you do not have the Hitron E31N2V1 or Hitron EN2251 models as they do contain the Intel Puma chipset.

      Spectrum DOCSIS 3.1 eMTA Data Sheet

      Reddit Discussion

      HardForum Discussion

      FCC Database Ubee E31U2V1 (click on External photos rev and Internal photos)

    • Actually, the Linksys CM3008 contains an Intel Puma 5 chipset, which is a good chipset. The CM3008 is an older modem, so it uses an older Puma chipset. Only the Intel Puma 6 and Puma 7 chipsets are bad. Thanks for the comment, Brian.

  19. I believe that the Cisco DPQ3925 has a Broadcom chipset. I just wanted to comment here, in case someone comes looking. Can someone confirm?

    • Yes, the Cisco DPQ3925 contains a Broadcom chipset, so it is safe to use. Trying to find the device on the FCC database (they utilize a horrible search engine) yielded no good results. The Brazilian version of the DPQ3925 is listed on the database, but shows no internal photos. insideGadgets shows a teardown for the Australian version of the Cisco DPQ3925-X modem. It shows a a nice large image of a Broadcom BCM3380 chipset.

      Russ, the DPQ3925 is more than a decade old device, so hopefully no one is using this modem anyway.

  20. I would love to know as a spectrum technician, if the EU2251 and the ET2251 or if in general do Ubee and Technicolor 3.1’s use an Intel chip. We have had nightmarish problems, absolute endless trouble calls with any customer that has a EN2251. There are issues with this modem aside from the chip defect. We found out that it would knock people offline when receiving or making phone calls. So even subscribers that had a triple play, but never plugged a phone in were getting knocked off-line from all the robocalls calls during the election. The EN2251 has got to be the absolute worse modem to have ever existed period. Hands down an absolute abomination.

    • It looks like the Ubee EU2251 and the Technicolor ET2251 utilize Broadcom chipsets. A previous comment talked about the Ubee EU2251 referencing a Broadcom chipset. Here are some Technicolor ET2251 reference points about the device utilizing Broadcom chipsets:

      Spectrum Equipment Guide

      DSLReports Comment

      Reddit Discussion

      The Hitron EN2251 definitely contains the bad Intel Puma chipset. In general, Hitron uses Intel Puma chipsets almost exclusively. Hitron devices should be avoided at all costs.

      The fact that technicians have so many issues with bad Intel Puma chipset modems should be another sign that ISPs need to stop handing them out to customers. This is the beauty of people being able to purchase their own modems, so they don’t need to deal with defective devices which causes frustration for everybody.

  21. I believe I have a new rebranding that surfaced today. I was unable to find out its chipset, as my Google-fu fails me. I assume this modem also has the bad chipset, save naming conventions, since it resembles the Hitron E*2251 series of failures. Could someone help me shed some more light on this one?

    Sercomm ES2251

    • Sorry, Russ, after a long search, nothing could be found on the Sercomm ES2251. A search on the FCC database showed no results for the time frame of 2018 and 2019 of when the device was announced in a press release.

      Update: The FCC only lists devices that are wireless, so the Sercomm ES2251 won’t be listed on the FCC database (no WiFi).

      The ES2251 looks to be another exclusive model number for Spectrum’s service (look at page 7 of the Spectrum D3.1 eMTA user guide). The Sercomm model is probably the least likely version to be given to customers. So the information that is needed here may not be revealed until a customer is given one of these ES2251 models and posts pictures of the chipset.

      Here is a summary of the other models:

      Hitron EN2251 Intel Puma chipset
      Technicolor ET2251 Broadcom chipset
      Ubee EU2251 Broadcom chipset
      Sercomm ES2251 ??? chipset

      • I spoke with a Spectrum Supervisor at the site I was having trouble, where this Sercomm ES2251 is now installed. They replaced a Hitron EN2251 with this Sercomm. He knew the Hitron EN2251’s have the Puma Chipset, and, so, installed the Sercomm. He specified this one does not have a defective chipset, which prompted my doubt. I wish I could take it apart and look, but the modem is 3000 miles away from me.

        Thanks for the info, Modem Gurus

  22. Ziggo, a cable provider in the netherlands still provides its users with these erratic modems in 2021.

    Video calling is problematic

  23. BASTARDS!!! Xfinity knew about this for three years! My Internet experience has been crap for more than a year now of leasing an Xfinity ARRIS TG1682G modem. Not only is connection crap, but the modem restarts at least once every day!!!
    And Xfinity did not recall this modem by now!!! I am going to buy Motorola MB8611. I have to turn in my leased modem. I am sure that this modem will be just passed on to another unsuspecting customer!!! Sue Xfinity, recall these crap boxes!!!

    • Michael Upset, that is the purpose of this site is to warn people of bad modems. Don’t forget to tell your friends and family. The Motorola MB8611 will be a huge upgrade over your leased modem. However, if you need a phone modem, you can look into the NETGEAR CM2050V. Rented modems are not a good idea as evidenced by your connection issues, Michael.

    • Thanks, the ARRIS TG3442 has been added to the list of confirmed bad modems. While this FCC listing blacks out the processor at the top of page 5, the FHCE2752 shown on the right side of the green square is an indicator of a Intel Puma 7 chipset. The TG3442 will certainly be bad for gaming.

    • Sorry, no new info. The only info available is from fellow commenter Russ who posted his experience with a technician. No other actual proof however. Due to the limited availability of the Sercomm ES2251 version of Spectrum’s D3.1 eMTA DOCSIS 3.1 Advanced Voice Modem, it may be some time before the chipset is revealed. Or the small sample size may mean nobody ever opens one up to photograph the chipset inside.

  24. I just purchased an Arris SB8200 before I read about this intel puma chip defect. Is this modem safe or should I just go ahead and return it before I even open it.


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