I own 2 sli machines and have eVGAs 122-CK-Nf68 boards in both of them.I am also running two 8800GTS's,next week ill be p[utting the GTS's in my E6700 machine,and installing 2 8800GTX's with my X6800.So I can honestly tell you that the 8800GTS's are worth every penny. eVGA just came out with 2 newversoins of both the GTS and the GTX. there both OCed .One version is the Superclocked and the 2nd is a KO with extreme cooling. I'm on eVGAs stepup program,but they do not offer these new versions for stepup. They are worth taking the time to read up on.