Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
forum threadsd69 posted Mar 17, 2026 05:07 PM
  1. Deal Image
Item 1 of 2
  1. Deal Image
  2. Deal Image
Item 1 of 2
forum threadsd69 posted Mar 17, 2026 05:07 PM

NETGEAR CM3000-100NAR Nighthawk CM3000 DOCSIS 3.1 Mid/high-Split Cable Modem, Up to 2.5Gbps, Black - Certified Refurbished $159.98

$160

$300

46% off
Amazon
16 Comments 4,721 Views
Get Deal at Amazon
Good Deal
Save
Share
Deal Details
I've been searching for a Mid/High Split cable modem to increase my upload speed on Xfinity. I almost went with the Hitron CODA56 but people are still complaining about the Puma 7 chipset. My other consideration was the Arris S34 but again people had issues. The CM3000 seems the most reliable but also the most expensive. This refurb from Amazon is almost half the cost of new and it has 90 day return policy.

https://www.amazon.com/dp/B0F3FXYWJS

Xfinity modems: https://assets.xfinity.com/assets...evices.pdf

Issues with Puma 7 chipset: https://www.modemguides.com/blogs...VSeOJdS3QX
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
I've been searching for a Mid/High Split cable modem to increase my upload speed on Xfinity. I almost went with the Hitron CODA56 but people are still complaining about the Puma 7 chipset. My other consideration was the Arris S34 but again people had issues. The CM3000 seems the most reliable but also the most expensive. This refurb from Amazon is almost half the cost of new and it has 90 day return policy.

https://www.amazon.com/dp/B0F3FXYWJS

Xfinity modems: https://assets.xfinity.com/assets...evices.pdf

Issues with Puma 7 chipset: https://www.modemguides.com/blogs...VSeOJdS3QX

Community Voting

Deal Score
+7
Good Deal
Get Deal at Amazon

Price Intelligence

Model: NETGEAR CM3000-100NAR Nighthawk CM3000 DOCSIS 3.1 Mid/high-Split Cable Modem, Up to 2.5Gbps, Black - Certified Refurbished

Deal History 

Sale Price
Slickdeal
  • $NaN
  • Today

Current Prices

Sort: Lowest to Highest | Last Updated 5/23/2026, 04:01 AM
Sold By Sale Price
Amazon$179.99

Leave a Comment

Unregistered (You)

16 Comments

Sign up for a Slickdeals account to remove this ad.

Mar 17, 2026 05:58 PM
31 Posts
Joined Oct 2014
M5910Mar 17, 2026 05:58 PM
31 Posts
Thanks, OP. I have a CM1100 with a 2 Gbps plan and was under the impression that it was sufficient. After doing some research, I realized that even with link aggregation, it isn't—and this is the right approach
Mar 17, 2026 07:34 PM
6 Posts
Joined Nov 2018
stewxvMar 17, 2026 07:34 PM
6 Posts
Great find, thank you!
Mar 17, 2026 08:40 PM
1,081 Posts
Joined Mar 2009
ginuwinqbinMar 17, 2026 08:40 PM
1,081 Posts
Damnit just paid full price 2 weeks ago.
Mar 18, 2026 01:59 AM
2,315 Posts
Joined Aug 2015
RedflyerMar 18, 2026 01:59 AM
2,315 Posts
Where are DOCIS 4.0 modems??? The cable companies have been promising it for 2024 and here we are in 2026 nothing.
Mar 18, 2026 02:36 AM
489 Posts
Joined Nov 2009
2rugsandacatMar 18, 2026 02:36 AM
489 Posts
Time machine I know... but wasn't this $99 a few weeks ago?

Purchased a non refurbished version 6 plus months ago and Comcast/ xfinity doesn't seem to be able to get the advertised speeds to work with this modem. Not sure who is to blame but my guess is the ISP
Mar 18, 2026 03:26 AM
763 Posts
Joined Dec 2010
silentalarmMar 18, 2026 03:26 AM
763 Posts
My old CM1100 has started to drop connection multiple times a day. Compatible with Cox so I'm in for 1. Thanks OP
Original Poster
Mar 18, 2026 11:01 AM
498 Posts
Joined Dec 2009
sd69
Original Poster
Mar 18, 2026 11:01 AM
498 Posts
Quote from Redflyer :
Where are DOCIS 4.0 modems??? The cable companies have been promising it for 2024 and here we are in 2026 nothing.
Only in certain markets (e.g., Colorado City) and only with Xfinity modems. They are years behind on the roll out. It's hard to make large capital investments when you are losing so many customers.

Sign up for a Slickdeals account to remove this ad.

Original Poster
Mar 18, 2026 11:04 AM
498 Posts
Joined Dec 2009
sd69
Original Poster
Mar 18, 2026 11:04 AM
498 Posts
Quote from 2rugsandacat :
Time machine I know... but wasn't this $99 a few weeks ago?

Purchased a non refurbished version 6 plus months ago and Comcast/ xfinity doesn't seem to be able to get the advertised speeds to work with this modem. Not sure who is to blame but my guess is the ISP
Look through the Xfinity forums. Assuming your area has mid/high split you should be able to get them to provision it but it requires endless our working your way up the tech support food chain. Some have had success using the Xfinity app with support.
Double check that your modem is on their list of next gen list. I would be surprised the CM3000 hit $99.
Last edited by sd69 March 18, 2026 at 04:07 AM.
Mar 18, 2026 11:14 AM
489 Posts
Joined Nov 2009
2rugsandacatMar 18, 2026 11:14 AM
489 Posts
Quote from sd69 :
Look through the Xfinity forums. Assuming your area has mid/high split you should be able to get them to provision it but it requires endless our working your way up the tech support food chain. Some have had success using the Xfinity app with support.Double check that your modem is on their list of next gen list. I would be surprised the CM3000 hit $99.
Appreciate the suggestions. I have tried and spent many hours on it to no end. Tech was out and get 2200 plus street side and never above 1k modem side. Spoke to both US and overseas tier two and supervisors. The boot file is supposedly correct... aka provision. I get the 200 up but not the down and using a device capable of multi down. I had to give up - not common for me.
Original Poster
Mar 18, 2026 11:28 AM
498 Posts
Joined Dec 2009
sd69
Original Poster
Mar 18, 2026 11:28 AM
498 Posts
Quote from 2rugsandacat :
Appreciate the suggestions. I have tried and spent many hours on it to no end. Tech was out and get 2200 plus street side and never above 1k modem side. Spoke to both US and overseas tier two and supervisors. The boot file is supposedly correct... aka provision. I get the 200 up but not the down and using a device capable of multi down. I had to give up - not common for me.
I'm looking for the upload because I'm running Channels DVR with multiple family members mooching off my subscriptions. Good to know at least the upload works. I'm only paying for 300Mbps service and my current upload is around 41Mbps. I'm hoping to get at least 100Mbps. I figure I have 90 days to see how it works.
So it was probably your post I was reading about the bootfile changes!
Mar 18, 2026 07:50 PM
489 Posts
Joined Nov 2009
2rugsandacatMar 18, 2026 07:50 PM
489 Posts
Quote from sd69 :
I'm looking for the upload because I'm running Channels DVR with multiple family members mooching off my subscriptions. Good to know at least the upload works. I'm only paying for 300Mbps service and my current upload is around 41Mbps. I'm hoping to get at least 100Mbps. I figure I have 90 days to see how it works.So it was probably your post I was reading about the bootfile changes!
Not sure the boot file info was me. Wish you the best - I even called Netgear and they confirmed functionality. You might get a little extra juice on the upload but will likely require a service upgrade. Aka more money...

think xfinity has this listed as approved but others are recommend.

ymmv
Last edited by 2rugsandacat March 18, 2026 at 12:53 PM.
1
Original Poster
Mar 20, 2026 12:44 AM
498 Posts
Joined Dec 2009
sd69
Original Poster
Mar 20, 2026 12:44 AM
498 Posts
Quote from 2rugsandacat :
Not sure the boot file info was me. Wish you the best - I even called Netgear and they confirmed functionality. You might get a little extra juice on the upload but will likely require a service upgrade. Aka more money...

think xfinity has this listed as approved but others are recommend.

ymmv
337 down/ 117 up. Happy camper for $40/month
Mar 20, 2026 11:02 AM
489 Posts
Joined Nov 2009
2rugsandacatMar 20, 2026 11:02 AM
489 Posts
Quote from sd69 :
337 down/ 117 up. Happy camper for $40/month
Good to hear. I was only getting 40 up until it was provisioned "properly" not sure that is a thing
Mar 22, 2026 08:31 AM
763 Posts
Joined Dec 2010
silentalarmMar 22, 2026 08:31 AM
763 Posts
Hooked this up yesterday and it's been a substantial upgrade over my CM1100. No changes to my router (Nighthawk RAX80 from 2019). Cox Gigablast. Over 700 Mbps down and 70 up.

Sign up for a Slickdeals account to remove this ad.

Original Poster
Mar 24, 2026 04:49 PM
498 Posts
Joined Dec 2009
sd69
Original Poster
Mar 24, 2026 04:49 PM
498 Posts
BTW, I stumbled across this post which provides some excellent information about Xfinity next gen rollout:
https://www.reddit.com/r/Comcast_...ed-speeds/

Leave a Comment

Unregistered (You)

Related Searches

ComputersComputer NetworkingModemsFree ShippingNETGEARAmazon

Popular Deals

See All
Found by UniqueWriter5055
Today 12:05 AM
Forum Thread
Apple TV: $4.99 Sale for Aliens, Gladiator II, Heat, No Country for Old Men, Pulp Fiction, Raiders of the Lost Ark, Saving Private Ryan, The Godfather, Tropic Thunder, etc.$4.99$15
66% off
0
Found by NeedMoCoffee
Yesterday 03:37 PM
Forum Thread
2-Pack Hongteya Toddler UPF 50+ Wide Brim Bucket Sun Hat (White/ Light Blue) $5.99 ($3.00 each) + Free Shipping w/ Prime or on $35+$5.99$15
60% off
2
Found by phoinix
May 21, 2026 10:36 AM
Forum Thread
$38.97* | Casio AQS810W-1AVCF Men's AQ-S810W-1AV Solar Sport Combination Watch, black at Amazon$39$65
40% off
3
Found by leafsfan
Today 03:48 AM
Forum Thread
Active Military/Veterans: Apple AirTag (2nd gen) 4-pk - $74 FS/No tax$74$99
25% off
2
Found by Dmytro_B
May 21, 2026 01:21 PM
Forum Thread
Samsonite Centric 2 Hardside Expandable Luggage with Spinner Wheels, Silver, 2-Piece Set (20/24) $102.63$103$147
29% off
0

Trending Deals

See All
Found by Taco_Doomsday
Yesterday 10:48 PM
Forum Thread
Milwaukee M12 FUEL 12V Lithium-Ion Brushless Cordless 1/4 in. Right Angle Die Grinder (Tool-Only) $109.5$110$219
49% off
6
Found by jk6812
Today 02:38 AM
Forum Thread
Astro Tool 18" Extra-Long Flex Head Nano Socket Ratchet Wrench (78318) $24.61 + Free Shipping w/ Prime or on $35+$25$35
28% off
1
Found by PennyFound
Yesterday 10:12 PM
Forum Thread
[Select Accounts] 8-Pack 3.03-Oz OREO Golden Cakesters Soft Snack Cakes $7.19 w/ S&S + Free Shipping w/ Prime or on $35+$7.19$14
48% off
1
Found by JohnnyB_M
Today 02:03 AM
Forum Thread
Active Military/Veterans Apple Ipad Pro 11" Wifi 256Gb with M5 Chip and Standard Glass - $799 - Save 20% plus NO SALES TAX
2
Found by samm7020
Yesterday 08:50 PM
Forum Thread
MSI rtx 5060 ti +0007 game $330$330$379
12% off
4