what to upgrade first

[tmel86]

Hey guys I'm looking at doing a slight upgrade to computer. Because of financial reasons id prefer to only replace one component if possible.... So if i could get some feedback on which component would give me the best boost, and possibly a good subsitute to replace it with, that wouldnt completely blow the rest of my components out of the water 😀

Windows 7 home edition
Processor: AMD phenom II x4 955 3.2 quad core 8.0mb cache
Motherboard: MSI 790x-g45 http://us.msi.com/product/mb/790X-G45.html#/?div=Basic
Graphics Card: 2x HIS Radeon HD 5830 crossfired
Power: Corsair TX 650w
Cooling: Bought a higher performance one for my processor in case i wanted to overclock but dont recall what it was.... ( not very tech savvy)
Ram: 2x 4gb 2x 2gb ddr3

Im guessing just by going off performances chart that my video cards need to go (plus one of my fans on my second one tends to act funny from time to time)
Anyways if someone could let me know what replacement/s would give me the most bang for my buck I'd appreciate it. btw preferably would like to spend around 400 bucks or less on it if possible.

Huge thanks in advance guys. Sorry if my info sucks, like i said im pretty poor at my tech skills any advice would be great help 😀
my current cards are about 10in length.from back to hard drive its about 13in

 

[Inertia01]

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130637 from newegg $79

im willing to spend another 50 bucks on a mobo would it be recommended? or would it not make a difference

That board is what i use to have and i never had a problem in the years ive had it, Its currently in my second rig still running beautiful and would not be much different to any other am3 boards

 

[tmel86]

ok well thank you both for all your time i cant thank ya enough

very appreciative

 

[Inertia01]

No worries at all glad to be of help to you and happy gaming you will notice the difference with that setup