trying to build new computer for school

[xbrosinx]

i have a budget of 900 dollars and im trying to build the fastest computer for the cheapest price for casual COD and LFD WOW etc. also to make it faster on the internet
i pieced together:
1.AMD Phenom II X4 955 Black Edition Deneb 3.2GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Quad-Core Processor
2.ASUS M4A785TD-V EVO AM3 AMD 785G HDMI ATX AMD Motherboard
3.ASUS VW224U Black 22" 2ms(GTG) Widescreen LCD Monitor w/ HDCP Support 300 cd/m2 1000:1 (ASCR 5000:1) Built in Speakers
4.NZXT Apollo Black SECC Steel Chassis ATX Mid Tower Computer Case
5.G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ
6.EVGA 512-P3-N871-AR GeForce 9800 GTX+ 512MB 256-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
7.OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply
8.Western Digital Caviar Blue WD6400AAKS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
9.ASUS Black 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA 24X DVD Burner - Bulk - OEM
im not sure if all of this will work well together so please gimme thoughts thx

 

[faxon]

first off, why are you getting DDR2 with a DDR3 motherboard? also, there's newer chipsets now as well, with more up to date features, i would look into one of those. these two are both good picks, support USB3.0, SATA 6Gb/s, crossfire, and all the other usual enmities. if you're looking for some slick overclocking action the 870 chipset will be a bit better suited for overclocking as it has much more aggressive voltage delivery circuitry for the CPU than the 880G, but the 880G also has integrated graphics if you care.
http://www.newegg.com/Product/Produc...82E16813128443
http://www.newegg.com/Product/Produc...82E16813128444