Does the fan fix in first post solves the hotness of HD 4870?

I'm thinking of buying one, which brand is recommended?

What brand is the cheapest HD 4870?

How come my system sangkut2 when play crysis high setting 1440 x 900 no aa no af.

Athlon X2 4600+
3 gig 667 ram
gigabyte 4870
x-fi xtreme music
corsai vx550w
vista ultimate 64bit

None taken

Haiz need to fork over more money for proc ar. Um off topic which is better to buy C2D e8400 or Q6600? Mostly for gaming

Prolly coz u overclock from 2.6Ghz to 3.6Ghz. Me stock speed only

Catalyst 8.7 I didn't even install whatever in the driver cd. Just straightaway download catalyst 8.7 then install it.
I don't quite understand, why do u ask I open Crysis then go to desktop?

I installed CCC from the catalyst software suite that I downloaded but I didn't install gpu z to monitor the clock. Does the clock speed vary when playing games?

One quick question, does changing HD4870 stock cooler with aftermarket will void warranty? And for gigabyte 4870 do i have to register 1st to get the warranty like ASUS?