Most new PC games require the latest and fastest computer components (check the box for exact specs) including motherboard, CPU(s), video board(s), sound card, memory, optical drives (CD and/or DVD drive) and hard drives.
Key components are a very fast processor, motherboard, video board and memory.
get good performence memory, 2 sticks so u can get dual channel, a mobo with 2 pci-x 16 slots so u can upgrade later, try and get a 10,000 rpm sata drive and a good amd processor for gaming. also ur powersupply shuld be ike 600 watts if u wanna go to sli later on. an x-fi card would be great but u can still get by with an audigy-z
oh ya and a razer diamondback mouse