Advice on $1200 gaming rig

[Helloworld_98]

^ it has two x16 slots but one runs at x8, however the 4890's can still run in x8.

 

[gkay09]

^+1
Like helloworld has said, that mobo has 2 PCIe slots...
And you wont notice significant real world performance difference between setups running @ x16x16 vs x8x8...But sure this would change when we get faster CPUs, that can keep up with that much graphics power...

 

[sam432]

hey okay thanks one more thing can you mount an am2+ heatsink on an am3 motherboard and cpu? because im looking a heatsinks for it and there are very few am3 ones