Thoughts on this gaming PC?

RAIDMAX RX500AF 500 watt http://www.newegg.com/Product/Product.aspx?Item=N82E16817152040 $44.99

Asrock motherboard http://www.newegg.com/Product/Product.aspx?Item=N82E16813157331 $54.99

Samsung DDR3 4GBx2 http://www.amazon.com/gp/product/B00592002W?ie=UTF8&force-full-site=1&ref_=aw_bottom_links $34.99

AMD Phenom 2 955 x4 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2375447&CatId=4433&SRCCODE=MDOTTD&MobileOptOut=1 $74.99 Case http://www.amazon.com/gp/product/B0066130AO?ie=UTF8&force-full-site=1&ref_=aw_bottom_links $54.99

HDD: http://www.amazon.com/gp/product/B003NSBF32?ie=UTF8&force-full-site=1&ref_=aw_bottom_links $71.99

GPU http://www.amazon.com/HD7870-DC2-2GD5-DisplayPort-Utilities-PCI-Express-Graphics/dp/B007JLFVNO/ref=sr_1_2?ie=UTF8&qid=1354600727&sr=8-2&keywords=Asus+7870 $199.99

Your Mobo and Cpu arent Compatable (different socket) and im not to sure about how well that power supply would perform

i do not know a lot about raidmax psu's but i think you would be better off with a corsair or seasonic psu cheaping out on a psu is not a good long run decision 

build it on pc part picker it will save you money and get rid of compatability issues like beyondnight said

The motherboard and CPU are incompatible, and Raidmax PSUs are absolutely horrible.

Any recommendations on a new psu and mobo?

What is your total budget for this build?

My budget is about $550

This is probably the best you're going to do with that budget:

http://pcpartpicker.com/p/qYPZ

What about with an $800 dollar? and whats a cool looking case That has usb 3?

 

Well it depends on what you think looks cool when it comes to the case. I would suggest doing a little more case research on your own to figure out what you like. If you like lights and windows, or if you would rather have a minimalist approach, I can try to find you something.

Here's what I would do with $800 though:

http://pcpartpicker.com/p/qZ13

Other things to think about upgrading down the road are adding an SSD and CPU cooler.

Thx so much! But what's the dif between a asus 7870 and a his 7870? 

There's no real difference between the two cards. One might be overclocked higher than another, and one might have a better warranty, but that's about it. The coolers are probably a little different too. Other than that, they're pretty much the same card.

Also, here is an AMD alternative with an SSD and CPU cooler for $800:

http://pcpartpicker.com/p/qZ4I