nago Posted March 16, 2007 Report Share Posted March 16, 2007 I've been having such a time with this problem, and I've finally solved it, so I wanted to let the moderators know about this one, hopefully get it stickied into a FAQ somewhere.I was having issues with uTorrent crippling my network speeds. Not the speed of the whole network, just to the one computer using it. I had a Linksys WRT54G, so of course everyone assumed that was the problem, but check out the neat thing:I have two computers using that router. One of them is Win 2003 with a HyperThreading processor, the other is Win XP with an AMD X2.The win2003 one had upnp enabled, dht, 1000+ global connections and ridiculous upload settings, but never slowed my internet. not one bit.The winxp one had reasonable settings, but would cause ping timeouts to even the switch it was connected to. weird, right?Other symptoms were;even when uploading at a meager 10kB/s, the other computer could access internet fine, but the computer uploading could not access anything at all.Closing uTorrent would almost immediately solve the problem.This, to me, rules out router and ISP issues, since both computers were networked in the same fashion. both had UPnP, DHT, the works. there had to be something else wrong.After reading a lot of infuriating faqs, and a few long forum threads, indicating DHT, TCPIP.sys, or the Linksys WRT54G as the culprit, I noticed a weird thing with my ping commands: the longer uTorrent ran, the more ping replies I saw producing a negative ping reply: that's right, a negative value. (for instance, -145ms).After googling this a bit, it stems from an error with AMD Dual Core processors and NVidia chipsets (though it might not be exclusive to these brands) -- it has to do with kernel level commands using incorrect processor affinities to run certain things, which would interfere with "realtime" based events, which could direly interfere with networking abilities, especially for heavy-hitting programs like uTorrent.The fix for this issue is to install the AMD dual core processor driver for winxp/win2003. You might be able to operate "just fine" without it, so I know a lot of you might not have installed this, especially if it didn't come with your driver CD for your chipset (mine didn't)- after installing this driver and rebooting, all of my network issues with uTorrent dissolved immediately.The drivers can be found here: http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_13118,00.htmlIf this has already been posted somewhere else, I apologize: I couldn't find anything in search results for "X2". Also didn't know quite where to post this... I hope someone finds this useful.Cheers, Nago. Link to comment Share on other sites More sharing options...
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