Do you have 7950GX2 SLi?
This is what's on my computer -
OS - Windows XP Home SP2
Motherboard - ASUS A8N-SLI Premium
Processor - AMD Athlon 64 X2 Dual Core
Video Card - Nividia GeForce 7900 GT/GTO (only one)
Power Supply - Antec TruePower Trio 650
You're only using a single MB of your RAM?
I'm not sure I understand.