Graphics Cards the problem?

Okay...I just put together my first gaming rig:

Thermaltake Black Kandalf LCS Full-Tower
EVGA X58 Classified Motherboard
Dual EVGA nVidia GTX 275 1792MB
Core i7 950
12G Corsair Core i7 Dominator PC12800 DDR3 RAM Tri-channel
2 Seagate Barracuda 7200 - 750GB
Kingwin Mach 1 Modular Power Supply - 1220w


When I first finished it, turns out the liquid cooling block was not compatible with the i7's so I had to order a new block. Well I had a Thermaltake CPU Spincooler so I finished the rig and would just install the liquid cooling once the proper block arrived. Well I started playing and everything seemed to work fine. Could play WoW on max setting and Crysis on High and it handled it beautifully. Well about two weeks went by and I received my new liquid block...I was pumped. So I took out my cards took out my MoBo and installed the liquid cooling. AWESOME!! or not... I powered up, everything seemed fine...went to play WoW...and OMG lag. when I had the game window opened at max the game was super laggy and not at full settings. Well I ran Prime95 to see if the liquid block was not doing its job...well idle it was at 19 C and at max load at 40 C...so it was doing its job...it was 10 C cooler than the spincooler. I ran 3D mark Vantage...it only scored 11000 and most of that was the CPU score...I disabled SLI thinking just maybe something went wrong there...WoW still did the same thing and I only scored a 5000...took the primary card out and tried just the secondary card...same only a 5000...so then I tried the other PCI-e slot I was not using...same. I have even tried reinstalling the Spin Q...just to see...SAME!!! anyone have ANY ideas...is it my CARDS both of them or could it be something else...seriously freaking lost...I just want to make sure its my cards before I drop 400 on an ATI Radeon 5870...I have no other parts lying around to try...Thanks for all who try and help here!