jsEDIT / UPDATE *** THIS ISSUE HAS BEEN ACKNOWLEDGED BY ARRIS AND INTEL WITH A POSSIBLE SOLUTION IN WORKS.THE PROBLEM BELOW EXISTS IN ALL SB6190 MODEMS AND ALSO A LIST OF OTHER INTEL PUMA BASED SYSTEMSPLEASE DONT REPLY SAYING "Have you tried X" or "I DONT HAVE THIS ISSUE" You DO..And we have..HOWEVER, *IF* this can be fixed by firmware has not been established yet. New people to this thread - PLEASE READ THE THREAD In the next 23 PAGES of thread LOTS of experts have looked at the postings, its been verified and vetted.Its kinda like a peer reviewed scientific paper now as others have also reproduced the results using different methods on different cable systems. CORRECTION TO BELOW. Max Linear has nothing to do with this issue. This is a INTEL issue.Sorry Max Linear.
* Detection tool - http://www.dslreports.com/tools/puma6
* uid://1900355 has a post with a list of devices that he can update
* Search dslr hardware section for Puma6 chipset: https://www.dslreports.com/testsearch?ndx=Recent&fy=1999&order=score&q=puma6&ty=2016&typ=hardware
We also moved our discussion over here
https://www.dslreports.com/forum/r31122204-SB6190-Puma6-TCP-UDP-Network-Latency-Issue-Discussion
The Arris / Intel Acknowledgment is covered on "THIS PAGE"
So. I was excited to upgrade from my Arris SB6183 to the Arris SB6190. We have 32 x 8 service in phoenix While they do not have gigabit turned on yet, the infrastructure is turned on and ready.
I was really surprized when the SB6190 clearly performed noticeably worse. My levels are awesome. My errors on all 32 channels are nil. YET browsing the web was noticeably slower and kinda stuttery. I went back to the SB6183. Way better. Back to the SB6190, clearly worse.
Then I noticed that gaming latency to local servers had doubled ?! And was highly jittery..
I run Multiping doing 3 pings a second to my Cox CMTS and run that 24/7 and chart that. I have for 8 years. I was SHOCKED at what i saw.
A HUGE MESS. Latency thru this modem DOUBLED. Not only that but had 250ms spikes every few seconds.
This renders this modem and any device based on the Intel Puma6 / MaxLinear FSC Full-Spectrum Capture technology wholly unsuited for gaming and questionable for ANY home use. I will expand on this further down in this post. I need to point out that Max Linear might be clear of this issue and it might just be a Intel issue.
This is a 8 hour plot. This is to my CMTS. I have YEARS of plot before this.
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This led to a 3 day exploration of the issue. I got Cox to update my firmware. I swapped back and forth 8 times between the devices.
CLEARLY its the modem. I am a EE. I design electronics. So I decided to really understand this issue.
The problem is extreme and, frankly, horrific. Arris and Intel Puma6/MaxLinear traded off speed for latency thinking no one would notice. They tossed latency out the window to get 32 bonded channels of speed. They tossed users under the bus as no user is really gonna use 1gbps BUT they will feel the latency and latency jitter in DNS lookups. Gamers will loose games because of random 250ms spikes in latency every few seconds.
Really its obvious from the front of the box that they intend to deceive. "speeds up to 1.4Gbs" .. REALLY ? Using a 1 Gbs ethernet link ? Wow, they defy physics on a 1 Gbps Ethernet link. 1Gbps is the MAX you can EVER EVER get out of this modem. Period. So from the box there was BS. I have filled a FTC complaint over that. Its a complete lie and highly deceptive.
Looking at the performance closely with 5 minute plots its just more scary.
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I had to make the scale bigger just to see the tops of the spikes.
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The Jitter, random fluctuations of latency, is HORRIFIC and stunning for any modern device.
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SOOO... OK OK... So how does that effect ME ??? you might ask...
2 ways..
1. Each page you browse has, on average 50 DNS lookups. Each element on the page has to look in a phone book and look up a number to connect to. This is so critical time wise that ISP's like cox maintain a DNS server as close to your house as possible just for speed. THIS MODEM DOUBLES LATENCY FOR THESE LOOK UPS. So EACH LOOK UP TAKES 2.5 times LONGER !. That REALLY ADDS UP. You can see it on page loads. This has a serious effect on simple web browsing.
2. Gaming. FPS gaming - and most types of gaming REALLY rely on short latency. This DOUBLES the latency BEFORE IT EVEN LEAVES YOUR HOUSE. It Also adds a HUGE random spike 2-4 times a second with really bad latency jitter. This will immd and directly effect your gaming in a negative way.
Latency jitter of this large magnitude, 250ms spikes every few seconds, causes other applications to degrade too. Like VoIP and streaming applications.
Sooooo... Intel / MaxLinear HAD TO KNOW ALL THIS. They HAD TO know the latency issues. They figured no one would be able to figure it out and it would allow them to dazzle people with the words "1.4 Gbps"... Well... It did not get by me..
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This is a A/B plot to Google. Its SO BAD you can see it in this plot all the way to Google.
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5 min plots
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So I looked at what was causing the issue.
WAIT, WHAT... Its not a Broadcom chipset !?! What Tha.. Everything else to date has been Broadcom based. Broadcom is DAMN GOOD at this...
Wait its INTEL ?!?! WTF...
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Intel... Puma6 / MAX LINEAR...
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This led to a WTF moment... Who is MaxLinear... Well..... Turns out looks like some Broadcom guys left Broadcom and created a new company and decided to go at it on their own...
MAX268
Turns out this box is the first box with this new Intel/MaxLinear chip set combo
Soooooo.... While this looks like a Arris SB6183... Inside its NOTHING LIKE IT..
Im posting here in the Cox HSI forum because im a VERY VERY HAPPY Cox customer for over 10 years. This is *NOT* a Cox issue, but one that will effect Cox customers.
DO NOT BUY THIS MODEM.. DO NOT BUY ANY CABLE MODEM/ROUTER BASED ON THIS CHIP..
If your a gamer, DO *NOT* BUY THIS MODEM... Buy a SB6183 and be happy up to 680Mbs with wonderful low latency and zero latency jitter.
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