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[Speed] Blast: very slow DL but normal UL speeds. Help please!

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Hi everyone, I am posting a new thread in the hopes that I can still get some help with my internet speed issues! I have Comcast Blast 105, but instead of 105 download I normally get anywhere from 3mbps to a speedy 10mbps I got this morning in the attached speedtest image. While 10 is better than 3, neither of them are remotely close to what I am paying Comcast a significant amount of money for. I have a SB6121 modem (my own), WRT320N router using DD-WRT, connected to my computer via ethernet rather than wifi. I've restarted modem, router, computer, and had my signal refreshed from Comcast. None of these have made a difference. My modem dialog screen shows all signals levels and ratios are perfectly normal. I'm at a loss. Any help would be greatly appreciated! -KP

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