for the video cards you plan to install. Then go to a shop like Newegg.com to see what's available in that range and what the buyers say about them. Then decide where to go from there. Whatever you do ....don't skimp on your PSU.
I am upgrading my computer in the next couple weeks. Now for the most part I already know what I want, but I am not sure if I need to upgrade my power supply or not. Right now I am using a 500w power supply. So I am going to list the current and future specs for my computer and would appreciate any and all advice, even if it doesnt regard the power supply.
intel quad core 2.4 ghz (Q6600 I think)
2 gb DDR2 ram
Nvidia 9500 GT with 1 gb memory
500 gb hard drive
lynksis wireless N adapter
8 gb DDR3 (maybe 16gb in the future)
new motherboard (old one is on verge of death)
a new touch screen temperature sensor
and adding a 2nd nvidia 9500 GT (a friend gave me his spare, so why not?)