asians probably don't know **** about how to setup the cooling in a pc then.
Because here in Australia we get temperatures up to 46c @ 90% humidity, and K8 cores work perfectly fine. infact the temp differences between the K8 and C2D aren't that much.
I put together a 5800+ system not long ago and it idled at 30c on cool days and never topped 41c on hot days, though that was on stock cooling with only 2 case fans.. would've been better with 2 front intake fans and a rear exhaust fan though.