Interesting so this was reproducible on normal air/water for >222bclk ? Just wondering how much was due to the right settings versus how much was due to sub zero cooling ? Tried loosening those sub timings for higher bclk ?

Was the >101mhz PCI-E frequency being set using setFSB or what you ended up with after setting from bios boot ? i.e. 101.8mhz = 102mhz in bios for PCI-E ? I ask as on my DFI UT X58 setting PCI-E frequency in bios shows ~+1mhz higher in setfsb i.e. when benching with HD4870x2 CF with 110mhz PCI-E setFSB shows 111mhz for me.

Nvidia 8400 PCIe Graphics Card + Xfire ATI 4890
interesting combination ??? why the 8400 card ? for higher PCI-E ? Or to force PCI-E link bandwdith from x16 to x8 ?