Get the 680i Nos. I hit 3.8 before I put my gpu's in my water loop. I know if I lapped my cpu, which I will probably do once it is actually paid for, I will be able to get my temps down and push my cpu to above 3.8 consistantly. Most of the people who have problems with the board seem to be having them with really high voltage memory, like around 2.4v. Tons of people over at XS use this board and love it. And btw, if you do go this route, the nforce mcp, spp-mcp, and spp all affect graphics performance in some way. Several people told me they shouldn't, but when I upped them I was able to go farther with my gpu oc and stay stable. I still don't know what safe levels are so I'm heading over to XS today to see how far people have gone.
C2 Q6600 @3.6
2- 1GB Crucial Ballistix DDR2 1000(1100 @5-5-5-12 2.2v)
2 EVGA 280GTX in sli
2 WD Raptor 74GB(RAID0)
1 WD Raptor 150GB
X-FI Fatal1ty Edition (Beyerdynamic DT770/80 with PA2v2 amp)
PC P&C 1 Kilowatt PSU
Dell 3007 WFP 30" LCD
LG 18x DVD/CD RW
Silverstone TJ09 (5-120mm Sythe S-Flex fans)-Best case on the planet...
Watercooled. Iwaki MD20RLT>PA120.3(6 fan push/pull)>Apogee GT>2 MCW60's>T-line