Building gamer rig on budget

[sameer0807]

As title says I'm looking to build a gamer rig on budget....and by budget I mean around $500..
I did some research and figured I need a kick ass GPU followed by decent CPU.

The only GPU that I can think of is xFx 8800GTs...
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=3296600&CatId=2514

CPU, most probably AMD 64x2 4200

For motherboard, I would need something SLI ready, so in the future if I have to upgrade, I'll just buy 2 video cards.
Biostar TForce TF570 SLI Motherboard looks like a good candidate:
http://www.tigerdirect.ca/applications/searchtools/item-details.asp?EdpNo=3089473
I like the dual RJ 45 ports option. Online gaming will improve.. :)

and finally DDR2 ram, at least 2gigs:
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=3424794&CatId=3408


I will be saving some money by re-using existing parts in my current PC such as the hard drive, keyboard/mouse and monitor.

Total cost so far:
GPU: $330
CPU: ???
RAM: $86

Total: $416

Any suggestions??? ideas...help me out here!
thnx

[clocker]

Power supply?
Operating system?

[kaiweiler]

Get two 1gb sticks of some DDR2 667Mhz or 800Mhz as opposed to the single 2gb stick.
Dual channel is a big improvement.
Something like http://www.canadacomputers.com/main.php?do=ShowProduct&cmd=pd&pid=010267&cid=RAM.346.307
Great deal if you could manage to get the rebate in on time, and if not still a reasonable price.

[kurzyk]

hey you didn't include price of the motherboard in your cost summary...

well, everything looks ok, if i had such an ammount of money avaible i would build domething similar, maybe only different mb cos i prefer abit or asus over biostar

[LaPistola]

No psu, hard drive, mobo, case. Got any of that??? and what about an OS?

[sexydingo]

This guide is all you need:

http://www.anandtech.com/guides/showdoc.aspx?i=3148