What realistic speed should I be getting with Ultimate? Tests seem low.

I assume a typo & it is an SB6183 modem, if so you should get full Ultimate speed with a wired connection.  I would test eliminating the router, with a direct wired connection to the modem.

Connected to the router.

Direct to modem gave the following:

Latency - 9ms

Down - 67.94

Up - 22.72

Am I getting throttled? Fresh Win10 install and get 600ms spikes in CSGO connected straight to the modem. When pinging the IP for the Baton Rouge Cox point, the longest packet trip was 1625ms and a spike would occur every 15-20 packets.

Can you post your signal levels from 192.168.100.1?

Also, can you post a tracert to one of the servers you play on?

I'll get a server route tonight when I play and notice the spike again. Didn't think about doing it last night.

Your downstream power levels are approaching out of spec.  Acceptable is between -10 to +10 dBmV, absolute max is between -15 & +15 dBmV.  Closer to zero the better.  10 out of your 12 channels are outside "acceptable" and you also have a high number of uncorrectable errors.  First thing I would check all the cables, from the dmarc to your modem.  Are all cables good, not showing any sign of wear or cracking?  Are all connectors firmly attached and tight?  Are there any splitters in the line?  If so, can you bypass them?  You are getting ingress from somewhere, you may need Cox to send a tech to help solve it.  Could be noise entering on the inside lines or coming from the street feed.

tracert to a server that had spikes....

***Edit***

Checked the dmarc box outside and the connection was good with no corrosion. Went in the attic and there was a splitter for the living room(modem) and the bedrooms. I don't have cable, so I removed the bedroom ones as I don't have a coupler on hand. I'm about to tie a rope to the outside cable in the attic and just run it down directly to the modem, since all TVs in the home use streaming.

Thanks. I'll check everything from the dmarc to the modem.

AllenP said:

Your downstream power levels are approaching out of spec.  Acceptable is between -10 to +10 dBmV, absolute max is between -15 & +15 dBmV.  Closer to zero the better.  10 out of your 12 channels are outside "acceptable" and you also have a high number of uncorrectable errors.  First thing I would check all the cables, from the dmarc to your modem.  Are all cables good, not showing any sign of wear or cracking?  Are all connectors firmly attached and tight?  Are there any splitters in the line?  If so, can you bypass them?  You are getting ingress from somewhere, you may need Cox to send a tech to help solve it.  Could be noise entering on the inside lines or coming from the street feed.