Check my build please! Also need Mobo advice

[bblack033]

Here is my build so far. Computer is for gaming. But i need to know if everything will work together. The budget was on as close to 550$ as i could get. And i only need the parts listed.

Also i'm not to sure on my Mobo selection but i was tried to find one that would work with my cpu and the ddr3 1600 memory.

Western Digital Caviar Black WD7501AALS 750GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" 80$

AMD Phenom II X4 940 Black Edition Deneb 3.0GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM2+ 125W Quad-Core Processor 126$

2. POWERCOLOR PCS+ AX5770 1GBD5-PPG Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 CrossFireX Support Video Card & OCZ Obsidian 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Combo 243$

MSI 870A-G54 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard 100$

Not sure if that Mobo will work but i wanted to keep the cost of the Mobo under 100$ if possible.

 

[Muffin Man]

am3 mobo means you'll need an am3 cpu.

heres a combo with your mobo and a x4 955 for $14 more.
Newegg.com - Computer Parts, PC Components, Laptop Computers, LED LCD TV, Digital Cameras and more!

the rest looks good.

 

[bblack033]

am3 mobo means you'll need an am3 cpu.

heres a combo with your mobo and a x4 955 for $14 more.
Newegg.com - Computer Parts, PC Components, Laptop Computers, LED LCD TV, Digital Cameras and more!

the rest looks good.

cool thanks again man! One more question though what is the difference between going with the phenom or the athlon? I know the phenom has L3 cache but is it going to be worth it to spend the 30 extra bucks and go with that processor?

athlon

or

Phenom

i know you recommanded the athlon in one of my other posts but i lost the combo.