ATi CrossFire Article Update - bad ATi provided AA shots @ HotHardware
Oh dear.

The Underclocking Experiment @ PC Stats
Underclocking? That's just sick!

ATI X550 Info @ techPowerUp
Specs.

Seasonic S-12 500W Power Supply @ Madshrimps
You've got the power.

Kool Solutions Memory Cooling Fan @ Madshrimps
Now you can crank the voltage up.

GeIL 512MB DC UltraX-XL DDR400 CAS 1.5 @ Techniz
That's low latency.