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if its 12Mbps over wifi that is a completely different problem and has nothing to do with the cable company when your wifi card connects to the router it has a sync rate all its own if the modem is a router/modem combo which it sounds like it is it still has nothing to do with your cable company if you get 30-50Mbps when connected directly to the modem via a ethernet cable your neighbor getting .92Mbps from his 5Mbps line is completely different from trying to expect 50Mbps from your wifi if you expect to get 50Mbps from wifi you'd have to be sync'd with your router at over 100Mbps do you happen to know what type of wireless your trying to use? wireless G? wireless N? also if the modem/router combo is using backwards compatible mode to be able to connect wireless G and N devices at the same time wireless N will operate no faster then the wireless G standards max speed wifi has a lot of things to keep in mind and a lot of things can interfere with wifi.. i'm assuming your using 2.4GHz band if that's true there is interference everywhere... even 2.4GHz wireless handsets, bluetooth, and cell phones, and microwaves can all interfere if you can provide me with a little info i should be able to better assist you and not guess so much

I don't know what to say. I was strict about not giving into their hype. I was happy with my Verizon phone and Directv. But was always down about the copper wire DSL thing with Verizon. We have no FIOS and almost as much as been told don't expect it. After 5 years of waiting I finally got the hook in the jaw when the guy came to the door 3 times. I let him in and when he said he'd give me 50mbps, and I was only getting .5 to 1mbps if lucky, that was it, I'M IN! So I took the Triple Play, Xfinity I guess it's now called. Now he was talking direct connection and I am talking wireless in my head. I might have asked him about the wireless but he did, to his credit, say that in extremes you may experience as low as 30mbps. So I thought hey that's still good. So I bought in. They set me up and for some reason with this new HP desktop Pavilion I was getting 50mbps faithfully and wireless even being 15 feet from the modem. This was great for 2 weeks and then something happened and it dropped off. Using Comcast's test I was getting 28mbps, below their promise of 30mbps under extremes. Then it's dropped down to 12 at times. After several techs and a new Arris DOCCIS 3 compliant modem there is no change and no explanation why I was getting such good speeds for the first 2 weeks. After testing here at testmy.net I feel I have real reliable numbers. Today Comcasts speedtest had posted over 30mbps, not bad, and now down to 28. But here it says more around 19mbps, which I feel is reliable. A far cry from 50mbps. To be sure, their "OUT" is that I am getting the 50 direct connected to the modem. I live in an old cul de sac in a small town and there is no interference. No one above or below or beside me. The house closest to me and the modem is empty. I have no explanation and they are tired I suspect of hearing from me. I too am tired of hearing me. You know what bugs me. Now they are saying that 12-15mbps is all I could expect with the modem 15 feet away. And here's another thing in my crawl. I have a friend across the street that I do maintenance on his computer. He has the old Verizon DSL at .5 to 1mbps and I can connect to him consistently and get a .92mbps consistently and he's only promised 1mbps at the best. So old slow Verizon DSL is sustainable, but big Xfinity cannot get me from a 50mbps at the modem to the pc 15 feet away at any better than 12mbps. This is not what I thought I was buying into. If there were not some advantages I like on the phone and the cable tv service I think I would have bolted before the first month was out. Is there any possibility that someone has found some resolution to something similar? Thanks so much! jack ":-|

I know it's been a while, so here's the followup: After trying pretty much everything... New drivers, cloned drive and drastic experiments, etc... NOTHING helped to fix this problem under Snow Leopard. I did see that my Macbook Pro that usually had good test results would do the same thing briefly--So it would show fast, then slow if I *immediately* retested, but even then it sped up a little bit partway through the test. So, I bit the bullet and upgraded the MacBook Pro to Mountain lion, and that went relatively smoothly. The problem seemed to be fully gone (not that it was very prevalent nor noticeable on that machine). After a day and a half of sorting the update from Snow Leopard to Mountain Lion 10.8.3 (released just last week) on the Hackintosh, I finally have the system running pretty well. Drum roll... YES! It appears that the problem is a thing of the past. I now get consistently faster downloads 40Mbps to 60Mbps via tests here. I can browse, and test, and test multiple times in a row and all works fine. I do notice things begin zippier in regular browsing as well. So, the bottom line is that if you are on Snow Leopard and are having issues with download speeds, your best option may be to upgrade to Lion/Mountain Loin. I really did do about everything I could think of to make this work in SL, or I wouldn't have done the update. Hope this helps someone not waste all the time on trying to get it working. THANKS TO ALL WHO SHOWED AN INTEREST AND HAD IDEAS TO SHARE! I doubt I would have done the ML install without hearing that Lion solved it elsewhere. -Tim PS. Re: wireshark... I haven't gotten it running on ML yet since there wasn't a need. Apple support site points to xQuartz for X11 installation. I did that, and didn't get any more messages when starting Wireshark, but it also didn't do anything but sit there in the lower app bar.