Im building a gaming PC. And want to be able to play all games for the PC including Crysis which comes with graphics card. -getting a Nvidia 8800 GTS/GTX which evers better. -500 Watt Power Supply -I have an Extreme Striker Motherboard (W/Sound card) -Antec Nine Hundred Case
What matters is that the cpu you plan to buy is supported by the motherboard/chipset. Each motherboard has restrictions on what cpu's it supports.
Overall gaming performance depends on the cpu but also the chipset on the motherboard, the memory technology/speed, and if you can install the latest SATA disk drives. Some motherboards also support RAID. With RAID 0, your games will load faster. Have fun building.
In *most* games, a 3.0Ghz single core CPU will outperform a 2.0Ghz dual core CPU as most games tend to be single threaded (or have one major thread and several minor threads).
AS far as the PSU goes the 8800GTX requires 450watts and 28amps on its +12V rails. As long as you have 28amps that 500watt will be ok but I'd suggest the 620watt Corsair for that build. It's modular quiet, has 80% plus efficiency, a five year warranty, 3 18amp +12V rails and is one of the highest rated PSUs there is. Even it's 520watt brother will do.
I dont know why these people think that, for one GTX you need a PSU with more power than Nvidia recommends to run TWO GTXs in SLI ?!?! Only video card that needs a 750watt PSU is the ATI 2900XT.
An overclocked GTX would be a good choice.