My PSU is a CoolerMaster GX450 80+Bronze.. Also I have a CoolerMaster Elite 430 with a 120MM exsaut fan and two 80mm intake fan, a side window fan for the GPU... I guess thats a good enough cooling, but Im going to buy some 2 more 120mm fans to change the 80mm ones.. I´ve read that the Hd6850 will be more than enough for my necesity, cuz I only have a 19" acer monitor conected via dvi, which max resolution is 1440x900... So i can play games at maxed with no problems... Thats i want, more power for the future, because i want to buy a 23" HDMI monitor to play at higher resolutions...
The rest of my pc is:
Athlon II x2 260 @ 3.2ghz (overlocked 3.7ghz@1.45V) with stock cooler, it doesnt go more than 60 cuz my room always is cold lol
Mobo ASRock N68C-S UCC
4GB ram Gskill 1033mhz at dual chanel
500GB HDD hitachi desktar
By the wat, I guess that i answered the topic question, as my HD 6570 runs pretty good in a PCI-E 1.0 slot and it says that its a 2.1 PCI-E bus... I can play crysis, NFS shift 2, dragon age 2 (this one its heavy) and GTA 4 (the heaviest of all my games) but at 1280x768 and details maxed i can play mostly everything... NFS, cryisis and dirt 3 i can play at 1440x900 with no problems...