2, graphics card: GTX580 I recommend Gigabyte, good workmanship stability.
3. Memory: 8G must be a 64-bit system, and 32 bits can only use 3.2G at most. According to your configuration, you won't play the old games many years ago. New games support 64-bit systems, so don't worry.
4. Hard disk: It is recommended to use 1 solid state hard disk as the system disk. SSD has no seek time to do RAID, and there is no big improvement. Recommend Intel 40G. I evaluated it and it performed very well. It is recommended to store two Seagate disks for RAID0 (the comprehensive evaluation of Seagate's eight hard disks by the new machine evaluation studio is higher than Western Digital) 2T(raid 0 is fast, RAID 1 data is stable, but the speed is slow, and the capacity of RAID 1 is halved, so there is no need to play games).
5, power supply: Antaike TruePower new TP650 This is very good. This power supply is used by our company's professional equipment, which is absolutely enough, and it will be enough for future expansion.
6. Is the cooling fan enough? If not, how much more? It is enough to add a fan to the chassis to exhaust air.