I recently got a new computer (spent a pretty penny on it) and upon trying to run 2 coppys of wow i got some horrible lag and frame rate loss. Here are my stats.

Operating System: Windows Vista™ Home Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.090302-1506)
Language: English (Regional Setting: English)
System Manufacturer: VelocityMicro
System Model: VelocityMicro
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 940 @ 2.93GHz (8 CPUs), ~3.2GHz
Memory: 6132MB RAM
Card name: ATI Radeon HD 4800 Series
Card name: ATI Radeon HD 4800 Series

i noticed that the memory use and cpu use are BELOW 50% when both WOW's are running. Im tottaly stumped. PLEASE HELP