Multiple 4870x2 problems

[mortonww]

Here's my build:

Core i7 920 @2.66
6 GB DDR3 triple channel RAM (OCz)
4870x2

My 3D Mark Vantage score for my GPU goes down from 15000 to around 10,800 when I run the CPU tests too. Why is this? So, if I run the test for just the GPU, I get 15,000, but with the CPU, I get 10,800. And the CPU score is 15,500.

Also, I get screen tearing in Crysis.

Any help would be appreciated!

 

[mortonww]

V-sync? Is this in the settings for the video card? Would I find this in Catalyst or in Crysis?