Visitor
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3 Messages
Modem or Router Upgrade Needed???
Hello - looking to understand and maximize my home download speeds. I own my modem (Arris Surfboard SB6190) & Router (Netgear 6400 AC1750). Both are rated at close to 1000mbps. I have Ultra Fast Internet (900mbps) from Xfinity. I performed a speed test and was given a 89mbps rating. I was thinking I needed to upgrade my internet devices but after doing some research, is there another issue going on? How do I get what I'm paying for with my home internet? FYI- I bought a wi-fi extender for the basement and it helped with streaming apps and Nintendo online gaming.
Andyr1
Gold Problem Solver
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8K Messages
3 years ago
Get rid of the 6190. It has a chipset in it with known bugs that cause all sorts of problems.
https://approvedmodemlist.com/intel-puma-6-modem-list-chipset-defects/
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BruceW
Gold Problem Solver
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26.3K Messages
3 years ago
Note that the SB6190 is not approved for use with the 900 Mbps Internet service tier. Comcast rates it for use with plan speeds "Up to 859 Mbps". Using devices on speed tiers for which they are not approved tends to produce unexpected results, often speeds well below what they should be. You need to pick one of the modems on the "Devices" page (https://www.xfinity.com/support/devices) that is approved for 900 Mbps, or drop back to a speed for which the SB6190 is approved. Also:
Speeds around 90 Mbps suggest a problem with the network connection, or the presence of a device (switch? network adapter?) that is rated for "Fast Ethernet" 10/100 Mbps speeds instead of Gigabit 1000 Mbps speeds.
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user_af1e5b
Visitor
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3 Messages
3 years ago
Thanks Bruce! I just ordered the NetGear CM1000. Hope it helps!
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Andyr1
Gold Problem Solver
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8K Messages
3 years ago
I assume you have the R6400. As noted, that 89M speed seems to imply something is only running at 100Mbit instead of 1000Mbit (Gigabit). You can try a speed test with WiFi and wired. If even WiFi tops out at 89, then the cable between the modem and router may not be good. A proper Gigabit-safe cable should be full-size Cat5e or Cat6. There are some cheaper Cat5 cables that may only have 2 pairs (4 wires), but Gigabit needs all 4 pairs (8 wires.) Don't use flat cables, either.
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