Hey Yossam. I had Fry's Electronics build me an Intel 6 core machine, earlier this year; with 32 gigs Patriot ram, a Corsair 100 liquid cooler, and a 3 gig Geforce card, 1000W PS, and case. About $1700 out the door including labor. The CPU is the intel 4930@3.4ghz, which was about $529 on sale. I had them build it as the last time I assembled a box it was nothing but grief. Ended up that Fry's had to pull 3 Asus Rampage boards off their shelves with each one being defective and we switched out to an equivalent MSI board, same issue with the RAM. So, even if you have the skills ,seems prudent to let a well stocked tech service do the job. I'm more then pleased with the performance for the cost, I still remember buying an Amiga 2000 for $2,500...