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 troubles 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 also includes Intel Puma 7 chipset modems.

Devices highlighted in bold are the more popular cable modems (best-selling modems).

USA Region Residential Modems

ARRIS TG1672 (or TG1672G)
Hitron CDA3
Hitron CDA3-35
Hitron CGN3
Hitron CGNM-2250
Hitron (CGNM) CGNM-2252
Hitron CGNVM-2559
Hitron CGNM-3550
Hitron CGNM-3552
Hitron CGNVM-3580
Hitron CGNVM-3582
Hitron CGNVM-3589
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
Linksys CG6350
Linksys CG7500
Linksys CM3016
Linksys CM3024


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 cable modem 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

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

    • Thanks exboxnick for the info.

      Those model numbers were actually intentionally left off the Do Not Buy list because none of the ISPs have approved those modems you referenced. Therefore, those modems do not place on the list.

      Yes, they are bad Intel Puma modems, but no one should be purchasing these modems since they are not approved by any internet provider anyway. Listing every bad modem would make for an even longer list. Obviously this site is only concerned with approved modems.

      Thank you for the input, exboxnick. At least this reply will have the modem models you mentioned for future reference. If you see anything else that should be addressed, please reply.

      • Modem Gurus said, “Those model numbers were actually intentionally left off the Do Not Buy list because none of the ISPs have approved those modems you referenced. Therefore, those modems do not place on the list.”

        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…

          • Static doesn’t exist on digital so if shes getting static it would be either an issue with the in-house copper phone wiring or the analog side of that cable modem. A digital cable modem receives its signals via a digital QAM signal on the coax side but on the house side its all analog. Just wanted to point that out as it may help you isolate the fault.

      • 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.

        And I apologize. This list you have above seems to be for consumer devices, which is fine. I didn’t catch that at first and for anyone who may have issues with their business, maybe, can refer to the URL.

    • 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.

    • Thanks, but the Technicolor 4350 is a modem geared for Canadian internet service providers. only deals with the USA region at this time. Thank you for the information.

  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.


    • Hello exboxnick,

      Since this is a business modem, it is beyond the scope of this site. A quick search did not reveal any info for the Technicolor CGA4131. It is unfortunate that businesses are usually forced to use the modems and routers given by the ISP. You could visit DSLReports’ Puma Test page while using the device to check for performance issues. Good luck!

    • 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?

    • Definitely get rid of the ARRIS SBG6950AC2 since it contains an Intel Puma chipset. The modem you should get depends on who is your ISP for your home. Modems for each ISP have recommendations. Be sure to choose a modem that does not have an Intel Puma chipset (avoid modems marked with a ♦) or you will continue to have troubles.

  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. It does not appear on the list because no American ISP has approved this device. The TG2492 appears to be for use in the European market. So for those in the Europe area, the ARRIS TG2492 is a bad modem. 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.

    • Here is the user manual for the Technicolor CGM4141. You will notice the manual lists both the CGM4140COM and CGM4141COX model numbers (they use the same chipset). The CGM4141 is using a Broadcom BCM3390Z chipset (safe to use).

      For added information, this site has a listing of several modems and which CPUs are used. Technicolor only utilizes Broadcom chips in all their other modems too. Hopefully that helps you!

  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!

    • 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!

    • Some models are intentionally left off the Intel Puma chipset list if no ISPs have approved the modem (to avoid clutter), which is the case for the Technicolor TC4350. This comment will remain here in case the TC4350 is added to one of the approved modem lists from an ISP.

      Thanks, Drew, for the comment!

        • LOL at the commenter’s name 🙂

          Businesses usually don’t worry about bad modems as they just take whatever device the ISP gives them. For some businesses, internet reliability is not as important to them as it is to consumers. But this comment will remain here in case an ISP approves this device at the consumer level. Thanks for the comment!

  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!!!

    • Thanks for the comment. The ARRIS TG2492 is a European device so it will not appear on the list above which is for the USA region. Glad you find the site useful.


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