Jump to content
sekrit

Questions for Comcast Xfinity subscribers who own modems...

7 posts in this topic Last Reply

Recommended Posts

I am considering buying a modem to use on my server with Comcast Xfinity services.

 

I am wondering:

1.) Would it be foolish/problematic?

 

2.) Can anyone recommend the modems that they have success with when using Comcast Xfinity services?

 

3.) Can anyone share modems that they have found problematic with Comcast Xfinity?

Share this post


Link to post

Hi,

 

1. It would not! It's the smart thing to do! It'll save you a bunch of money in the long run.

 

2. Can you let us know what speeds you have? Modem will depend on down/up speeds. But I always go with a ARRIS Surfboard modem. I've never had a single issue with them for many many years. Again depending on your speed I can't recommend a specific model.

 

3. As long as you go with a good reputable brand you should be ok! Be a bit weary buying a used on from craigslist or ebay as if it's not removed from the old account you can't add it to yours.

Share this post


Link to post

I currently (supposedly) have 100 down (I will likely upgrade to 1Gbps by October).

 

I bought gateway from eBay once, but it apparently was a stolen one or something, intended to be used by Xfinity.  So, they wouldn't activate it.

 

But, i'd love to move away from leases and prep for 1gbps.

Share this post


Link to post
2 hours ago, sekrit said:

I currently (supposedly) have 100 down (I will likely upgrade to 1Gbps by October).

 

I bought gateway from eBay once, but it apparently was a stolen one or something, intended to be used by Xfinity.  So, they wouldn't activate it.

 

But, i'd love to move away from leases and prep for 1gbps.

I would do this: https://www.amazon.com/ARRIS-SURFboard-SB6190-DOCSIS-Cable/dp/B016PE1X5K/ref=sr_1_fkmr1_1?keywords=arris+surfboard+1gbps&qid=1553559217&s=electronics&sr=1-1-fkmr1

 

Unless you wanted to really really future proof (but I think it's a waste of money) then you could do this:

https://www.amazon.com/Next-Generation-ARRIS-SURFboard-SB8200-DOCSIS/dp/B07DY16W2Z/ref=sr_1_fkmr1_2?keywords=arris+surfboard+1gbps&qid=1553559217&s=electronics&sr=1-2-fkmr1

 

Remember these are just modems you'd still need a router. Unless you were looking for a gateway?

Share this post


Link to post
Posted (edited)

Which do you use?

Screenshot_2019-03-25-21-18-18.png

Edited by sekrit
Added review sample

Share this post


Link to post

I use an SB8200 with no issues on a gigabit down/40mbps up connection after my previous arris router died after 2 years of service. Got it on a really good deal plus gift cards (they're more expensive now than when I bout a year ago.) It is deceptive though, 10gbps capable download speeds but only two gigabit ports.... and currently xfinity only allows one in use. 

 

As far as latency spikes, if I saturate my connection I can get some buffer bloat/latency, but on average it does not occur with my household demands. Additionally, even when downloading files, most remote servers aren't providing full bandwidth of files I'm pulling down.  I'm running this hardware in conjunction with virtualized PFSense on my server. Average latency 7-8ms to my ISP gateway. 9-10ms to 8.8.8.8 or 1.1.1.1.

 

Long story short: it works fine for me. fast.com speed test screen shot below, ran with 2 other people currently streaming. You could probably get away with a lower model just fine but when a deal comes along, sometimes you gotta go big.

 

867717940_ScreenShot2019-03-26at8_05_28AM.png.162eee2f1b31fd5552b67f53d0c0ef0b.png

Share this post


Link to post

PRECISELY what I needed to know.  Thanks so much, Brother!

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.