With the advent of Windows Vista and my inability to play Counter-Strike: Source at the nice framerate that i was able to before Vista [with XP], I figured it was time to upgrade some parts in my rig. To be detailed, my framerate dropped from an average of 150 to an average of 40. I have tried multiple drivers, but to no avail. So i started off with the ram and bought 2 more sticks of 512 Corsair. I also got a new case because my Thermaltake Soprana crapped out on me and the front door is broken. Hopefully, the doubling of my ram will help take care of my framerate problem in games. But if it doesn't, should i add another 7800GT to go SLI? I have the power supply for it, but will it be worth it? http://www.newegg.com/Product/Product.asp?Item=N82E16814130077&ATT=14-130-077&CMP=OTC-Froogle I would probably get that. But having dropped already ~250 for a new case and a gig of ram, I'm getting upgraditis. Perhaps a new mobo? Processor? My rig is in my signature, so what do you guys recommend? Going SLI with two 7800GT's? Or spending another 600 or so and getting a whole new computer altogether. I'm looking for best bang for my buck right now.