First, getting a case with a power supply is not a good idea. Often, the case is okay, but the power supply is garbage. You also don't need to buy a separate heatsink and fan since one comes with the CPU. Actually, the 9400 GT would choke on Crysis, it just isn't powerful enough for that game. A $600 computer is a good price for a general/light gaming PC, here's a suggested setup. Note, that since I didn't know what exactly you were going to be doing with the PC, I cannot suggest top-of-the-line high performance stuff.
Case:
COOLER MASTER Centurion 5 CAC-T05-UW Black Aluminum Bezel , SECC Chassis ATX Mid Tower Computer Case - I suggest this case if you're not going for a high performance PC. $49
Case 2:
Sunbeam Transformer IC-TR-US-BA-WOPSU Black Steel ATX Full Tower Computer Case - If you're going for a high-performance PC, or want to SLI or Crossfire, this case has the added depth and fans to make it work well. $75
Motherboard:
ASRock A780GXE/128M AM2+/AM2 AMD 780G ATX AMD Motherboard - This is a stable AMD motherboard with plenty of features. $79
RAM:
OCZ 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 - I suggest getting two of these RAM kits to max out your memory. If you want to save cash, you can limit yourself to just one. $87 ($43 x 2)
Power Supply:
OCZ StealthXStream OCZ600SXS 600W - This is a good PSU, it's quiet, well built, and will provide more than enough power for your PC. $70 (Before $20 mail-in rebate)
Graphics Card:
SAPPHIRE 100265HDMI Radeon HD 4830 512MB - This is a solid, mid-range card that will easily handle most tasks and will run good with most games. If you're wanting a high performance card, the
HD 4870 or the
GTX 260 will be good, but expensive, choices. Note that this motherboard supports Crossfire with ATI cards only. $89 (Before $15 mail-in rebate)
CPU:
AMD Athlon 64 X2 7750 Kuma 2.7GHz - This is a dual core CPU with a high clock speed. Essentially, this is AMD's Phenom quad core processor with two cores shut off. It's an excellent mix of value and power. $65
Hard Drive:
Western Digital Caviar Black WD5001AALS 500GB - Plenty of space. $70
Optical Drive:
LITE-ON Optical Drive - This will read and burn most optical media. $23
Operating System:
Windows Vista Home Premium 64-bit SP1 OEM - You need a 64-bit operating system to use 4GB or more of RAM. $99
Cost: $635 (Before rebates)
Edited by DJBPace07, 29 March 2009 - 04:40 PM.