How do I know what GPU is being used

[holymonk]

Got the Mrs a laptop for xmas, has a 640M in it, was less than impressed by the FPS in WOW with no addons - it also has an ivybridge - how do I know what GPU its using - can i turn off the inbuilt GPU in the bios?

Thanks

 

[holymonk]

I cant link it as its a competitor but the specs are below

Screen:

17.3" HD LED Backlit Screen
Memory:

4GB DDR3 1333Mhz Memory
Graphics:

NVIDIA Geforce 640M 2GB Graphics
Chassis:

Intel HM77 Chipset
Processor:

Intel Core i5 3210M Processor
Harddrive:

500GB 2.5" Hard Drive
Optical Drives:

SATA DVD Writer


To be honest I havent really had chance to give it a whirl etc, but would dedicated gfx automatically overwrite the HD4000?