Most helpful positive review
104 of 110 people found the following review helpful
on February 22, 2013
Purchased this cable modem to replace my 6 year old Motorola SB5121 that I have rented from Comcrapstic the whole time. Doing the math on the total rental fees I have paid over the years yields an amount of OVER $500!!! No more rental fees. The other modem I was considering was the Mot SB6141...everyone knows about Motorola though. I chose the Arris based on the CM820A being a "3 star certified" modem per Comcrapstic's rating scale on their approved devices page. The second reason would be on the fact that Arris is a great manu of telephony/cable modems, this is mainly what they are known for.
Checking my speeds I am getting a solid and consistent 25 mbps down and 3.5 mbps up. This is phenomenal based on the fact that I am on the Performance tier. My power down is between 1.5-3 db with a 37-38 SNR on all 8 channels, awesome. My power up is 38 db, great. The interesting thing about that is that I split the signal twice before it goes to the modem, go figure. I am using PCT 2-way splitters on my setup.
***ALWAYS snug up ALL of your coax connections with a wrench***
Highly recommend the CM820A modem!!!
UPDATE 5/4/2015: Upgraded to the Blast! speed tier (rated at 50 Mbps). I am getting 60 Mbps down with a 1.2-2.0 db power reading at a 37-37.5 SNR. Pretty impressive. I am also getting 12 Mbps up at 38.25 db, very nice.
UPDATE 3/23/2015: Speeds are holding steady at 30 Mbps down and 6 Mbps up.
UPDATE 2/25/2015: The modem has been rock solid for going on two years now. No drops or connectivity issues. Very happy with the performance.
For all the people talking about not using a wrench on coax connections may have misinterpreted what I was "recommending." When I stated to "snug up all your coax connections with a wrench," I meant using a SMALL open-ended/combination wrench...not a torque wrench dialed into 150 ft lbs! If you use a small wrench and take it just past finger tight, that is all that is needed.