Drastic speed swings, high packet loss, fluctuating latency, unplayable for games

[Sean30]

About a week ago i started getting drastic speed swings, high packet loss, fluctuating latency,  and lag which makes games unplayable online.  I made sure all my software/firmware was up to date, i restarted router and modem multiple times, i contacted xfinity for help and was told it wasn't "their end." I bought a brand new modem and installed it with no change in the problem. When running internet speed tests my speed drasticaly fluctuates from 119mbps to sometimes less than 1mbps.  Yesterday when I ran a speed test my upload speed was faster than my download speed, which I have never seen before.  I ran virus scans for malware ETC and found nothing.

Please help.  

I am using an ASUS AC5300 tri band router with an ARRIS SB8200 modem and I am on a wifi network. Again, this problem started within the last week, nothing on my end had changed.

[Sean30]

Startup Procedure
Procedure	Status	Comment
Acquire Downstream Channel	483000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+
DOCSIS Network Access Enabled	Allowed

Downstream Bonded Channels
Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
5	Locked	QAM256	483000000 Hz	-1.9 dBmV	40.2 dB	0	0
1	Locked	QAM256	459000000 Hz	-1.7 dBmV	40.4 dB	0	0
2	Locked	QAM256	465000000 Hz	-1.8 dBmV	40.3 dB	0	0
3	Locked	QAM256	471000000 Hz	-1.9 dBmV	40.4 dB	0	0
4	Locked	QAM256	477000000 Hz	-1.9 dBmV	40.4 dB	0	0
6	Locked	QAM256	489000000 Hz	-2.0 dBmV	40.2 dB	0	0
7	Locked	QAM256	519000000 Hz	-2.3 dBmV	40.0 dB	0	0
8	Locked	QAM256	525000000 Hz	-2.2 dBmV	40.1 dB	0	0
9	Locked	QAM256	531000000 Hz	-2.1 dBmV	40.1 dB	0	0
10	Locked	QAM256	537000000 Hz	-1.9 dBmV	40.2 dB	0	0
11	Locked	QAM256	543000000 Hz	-1.7 dBmV	40.3 dB	0	0
12	Locked	QAM256	549000000 Hz	-1.6 dBmV	40.3 dB	0	0
13	Locked	QAM256	555000000 Hz	-1.6 dBmV	40.1 dB	0	0
14	Locked	QAM256	561000000 Hz	-1.3 dBmV	40.2 dB	0	0
15	Locked	QAM256	567000000 Hz	-1.4 dBmV	40.1 dB	0	0
16	Locked	QAM256	573000000 Hz	-1.5 dBmV	40.1 dB	0	0
17	Locked	QAM256	579000000 Hz	-1.3 dBmV	40.0 dB	0	0
18	Locked	QAM256	585000000 Hz	-1.3 dBmV	40.1 dB	0	0
19	Locked	QAM256	591000000 Hz	-1.3 dBmV	40.1 dB	0	0
20	Locked	QAM256	597000000 Hz	-1.7 dBmV	39.9 dB	0	0
21	Locked	QAM256	603000000 Hz	-2.2 dBmV	39.8 dB	0	0
22	Locked	QAM256	609000000 Hz	-2.3 dBmV	39.8 dB	0	0
23	Locked	QAM256	615000000 Hz	-2.4 dBmV	39.6 dB	0	0
24	Locked	QAM256	621000000 Hz	-2.6 dBmV	39.5 dB	0	0
25	Locked	QAM256	627000000 Hz	-2.4 dBmV	39.5 dB	0	0
26	Locked	QAM256	633000000 Hz	-2.7 dBmV	39.3 dB	0	0
27	Locked	QAM256	639000000 Hz	-2.8 dBmV	39.2 dB	0	0
28	Locked	QAM256	645000000 Hz	-2.9 dBmV	39.3 dB	0	0
29	Locked	QAM256	651000000 Hz	-3.0 dBmV	39.1 dB	0	0
30	Locked	QAM256	657000000 Hz	-2.8 dBmV	39.4 dB	0	0
31	Locked	QAM256	663000000 Hz	-2.6 dBmV	39.4 dB	0	0
32	Locked	QAM256	669000000 Hz	-2.7 dBmV	39.4 dB	0	0
159	Locked	Other	805000000 Hz	0.0 dBmV	38.0 dB	479627872	0

Upstream Bonded Channels
Channel	Channel ID	Lock Status	US Channel Type	Frequency	Width	Power
1	5	Locked	SC-QAM Upstream	41200000 Hz	1600000 Hz	48.0 dBmV
2	1	Locked	SC-QAM Upstream	17300000 Hz	6400000 Hz	48.0 dBmV
3	2	Locked	SC-QAM Upstream	23700000 Hz	6400000 Hz	48.0 dBmV
4	3	Locked	SC-QAM Upstream	30100000 Hz	6400000 Hz	48.0 dBmV
5	4	Locked	SC-QAM Upstream	36500000 Hz	6400000 Hz	48.0 dBmV

[EG]

This may not be the root cause of the problem but it should be addressed nevertheless.

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.