Slow Speeds - Xfinity Gigabit Internet

[CooyonLA]

Looking for help:

Since i upgraded to gigabit service with xfinity, I haven't topped 100mbps download speeds. I'll provide my cable connection stats below to see if someone can provide input. After researching for hours, I've realized that majority of my connections are pretty good. The only thing that sticks out is the correctable Downstream OFDM Channels. I don't really understand what that means, I'm just trying to figure out the culprit of the slow speeds (wiring of my house or a technical issue that can be resolved with Xfinity/Netgear support)

Stats below:

Frequency start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

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<tabindex=-1>Startup Procedure</tabindex=-1>

Procedure	Status	Comment
Acquire Downstream Channel	645000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enable	BPI+
IP Provisioning Mode	Honor MDD	IPv6 only

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<tabindex=-1>Downstream Bonded Channels</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR / MER	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	QAM256	37	645000000 Hz	4.8 dBmV	41.4 dB	586828586	0	0
2	Locked	QAM256	9	477000000 Hz	7.1 dBmV	42.8 dB	585596267	0	0
3	Locked	QAM256	10	483000000 Hz	7.0 dBmV	42.8 dB	585600351	0	0
4	Locked	QAM256	11	489000000 Hz	7.0 dBmV	42.8 dB	585604304	0	0
5	Locked	QAM256	12	495000000 Hz	7.1 dBmV	42.9 dB	585607991	0	0
6	Locked	QAM256	13	501000000 Hz	7.1 dBmV	42.8 dB	585611062	0	0
7	Locked	QAM256	14	507000000 Hz	7.1 dBmV	42.8 dB	585615382	0	0
8	Locked	QAM256	15	513000000 Hz	7.3 dBmV	42.7 dB	585618647	0	0
9	Locked	QAM256	16	519000000 Hz	7.2 dBmV	42.7 dB	585624278	0	0
10	Locked	QAM256	17	525000000 Hz	7.3 dBmV	42.8 dB	585627827	0	0
11	Locked	QAM256	18	531000000 Hz	7.3 dBmV	42.8 dB	585631655	0	0
12	Locked	QAM256	19	537000000 Hz	7.2 dBmV	42.8 dB	585635557	0	0
13	Locked	QAM256	20	543000000 Hz	7.1 dBmV	42.7 dB	585639226	0	0
14	Locked	QAM256	21	549000000 Hz	7.2 dBmV	42.6 dB	585642270	0	0
15	Locked	QAM256	22	555000000 Hz	7.0 dBmV	42.5 dB	585647155	0	0
16	Locked	QAM256	23	561000000 Hz	6.9 dBmV	42.3 dB	585650509	0	0
17	Locked	QAM256	24	567000000 Hz	6.6 dBmV	42.3 dB	585656884	0	0
18	Locked	QAM256	25	573000000 Hz	6.4 dBmV	42.3 dB	585660798	0	0
19	Locked	QAM256	26	579000000 Hz	5.9 dBmV	42.1 dB	585664713	0	0
20	Locked	QAM256	27	585000000 Hz	5.8 dBmV	42.0 dB	585668219	0	0
21	Locked	QAM256	28	591000000 Hz	5.8 dBmV	41.9 dB	585671725	0	0
22	Locked	QAM256	29	597000000 Hz	5.5 dBmV	41.6 dB	585675660	0	0
23	Locked	QAM256	30	603000000 Hz	5.3 dBmV	41.5 dB	585679092	0	0
24	Locked	QAM256	31	609000000 Hz	4.9 dBmV	41.5 dB	585682250	0	0
25	Locked	QAM256	32	615000000 Hz	4.4 dBmV	41.3 dB	585686915	0	0
26	Locked	QAM256	33	621000000 Hz	4.2 dBmV	41.1 dB	585689760	0	0
27	Locked	QAM256	34	627000000 Hz	4.2 dBmV	41.1 dB	585693651	0	0
28	Locked	QAM256	35	633000000 Hz	4.4 dBmV	41.0 dB	585698102	0	0
29	Locked	QAM256	36	639000000 Hz	4.5 dBmV	41.0 dB	585701535	0	0
30	Locked	QAM256	38	651000000 Hz	4.8 dBmV	41.2 dB	585703383	0	0
31	Locked	QAM256	39	657000000 Hz	4.8 dBmV	41.4 dB	585704539	0	0
32	Locked	QAM256	40	663000000 Hz	5.1 dBmV	41.4 dB	585706410	0	0

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<tabindex=-1>Upstream Bonded Channels</tabindex=-1>

Channel	Lock Status	Modulation	Channel ID	Frequency	Power
1	Locked	ATDMA	1	35800000 Hz	47.3 dBmV
2	Locked	ATDMA	2	29400000 Hz	47.3 dBmV
3	Locked	ATDMA	3	23000000 Hz	47.3 dBmV
4	Locked	ATDMA	4	16600000 Hz	47.3 dBmV
5	Not Locked	Unknown	0	0 Hz	0.0 dBmV
6	Not Locked	Unknown	0	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Hz	0.0 dBmV

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<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0, 1	159	690000000 Hz	5.7 dBmV	40.0 dB	1246 ~ 2849	442088587	9941739	0
2	Not Locked	0	0	0 Hz	6.4 dBmV	0.0 dB	0 ~ 4095	0	0	0

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<tabindex=-1>Upstream OFDMA Channels</tabindex=-1>

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	Unknown	0	0 Hz	0 dBmV
2	Not Locked	Unknown	0	0 Hz	0 dBmV

Any feedback would be greatly appreciated!

[CooyonLA]

Just realizing it cut off

<tabindex=-1>Downstream OFDM Channels</tabindex=-1>

Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 0, 1 159 690000000 Hz 5.7 dBmV 40.0 dB 1246 ~ 2849 442088587 9941739 0 2 Not Locked 0 0 0 Hz 6.4 dBmV 0.0 dB 0 ~ 4095 0 0 0

Correctable Codeword= 9941739

[FURRYe38]

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are not coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 

[plemans]

How are you testing this?

do you have a pc hardwired into the modem? 

What pc is it? Is it a gigabit pc? 

Have you checked the cable to ensure it supports gigabit? standard cat5 doesnt. Cat5e does

What site are you speedtesting on?

I've had the isp provision a modem wrong. Might be worth checking with xfinity to ensure it has the proper provisioning. 

[CooyonLA]

Hi,

I run speed tests through speednet, xfinity app, etc. Turn my VPN on and essentially same results

Yes, I hardwired into my modem. I'll get about 105mbps hardwired to modem. 95mbps hardwired to router

I have a brand new PC I-7 9700K with gigabit capabilities. I ran a cat 6e wire from my router, into the attic, to my office about 3 weeks ago to see if that would help. I had the Netgear Powerline adapter's before and honestly think i was getting better speeds (130mbps) using the adapters. 

And i will reach out to xfinity about the provision.

Just a little background information. I bought my house in July 2019. The previous homeowner stated that he had xfinity service. So, I placed a contract online and hooked up my own equipment. I'm thinking that the cable wiring might be old/outdated. The wiring runs around the perimeter of the house with cable entries into my kitchen, living room, and 2 bedrooms. So might be too many splitters?

[plemans]

do you have another device you could test right at the modem? plus then you can also try different ethernet cords to make sure it isn't a wire issue.