so Vlink 8x is the cause?I have an idea, let's put the nice blue head sink on SB from NB, and get a fan to activly cool the NB (there are 2 holes around NB for the fan) AGP 8x is directly link to memory, have anything to do with the Vlink? Vlink is to transform all system IOs' data from SB to NB, and According to VIA, the Vlink have a fix freq at 266Mhz. If fsb increase, Vlink should remain same otherwise ABit must do something wrong. Still no idea how it crush the agp. maybe we can suggest Abit to lock the Vlink speed. If fsb get higher, it doesnt have impact on system.