For future reference, read the sticky:
Give as much feedback as possible so that others can give appropriate advice (and interest to your topic).
Use BIOS or a software like AIDA64 to see the psu voltages and system health and stability.
Use hard disk sentinel, hd tune pro or any other good hdd monitoring program to see if it's all good.
Graphic card noises like an electrical "sqweaking" during load are normal.
I would suggest to take a look at the WoW forums as well.
Post more detailed feedback, test a little and we shall see.
gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, xfx HD 5970 + gigabyte HD 5970 (950mhz/ 1100mhz), coolermaster ultimate 900w PSU.
amd catalyst 14.12 Omega Driver