Are you and your brother's pc's are networked, then it could be that he has stuff downloading right through? You can try taking his pc off to see for sure. Are you using any w/less routers that are unsecured. Could be that some one is mooching off of your bandwidth. If not you can try rebooting/resetting the router etc. If still no luck you might have to call in tstt to see if they can figure out what the problem is since it may be on their end.Btw...what parts are you getting in?
Something else to consider especially when gaming online is that the relative location (by relative I mean relative to YOU) could mean that your latency will be high. As it is, TSTT aDSL latency to the US isn't all that great.. starting in the 100+ms range and upwards from there. It depends on which server you're connecting to. For instance, in Gears of War on Xbox live, when a search is performed to see the available public matches, there is an indicator to let the player know if the connection is good or bad. Basically you may not be able to do anything to improve your connection to the game server because of where in the world it is. Otherwise downloading or other usage of bandwidth can add to your trouble. When on Xbox live on TSTT 256k DSL you CANNOT do ANYTHING else... even MSN messenger will slow down the connection (makes yuh wonder WDMC msn messenger doing eh? since WOW runs while I on live with MUCH less interuption to my gaming but I digress).
AMD Athlon 64 X2 6000+ Windsor 3.0GHz 2 x 1MB L2 Cache Socket AM2 Processor - Retail http://www.newegg.com/Product/Product.aspx?Item=N82E16819103773
http://www.dslreports.com/tools try that site the have line quality testing, tweak testing and all types of different tools that may help diagnose your problem.
Man getting a 8800gts 640 yes. I feel I go get mine first though hahahaahah.