SLI or new GPU?
Hey All, been a while since I last posted. Should I dual SLI by getting another 512mb 8800GT (preferably from PNY, but I guess the manufacturer can be different now?) or upgrade to a new GPU. My specs are in my sig. Keep in mind my PSU, I don't know how much more power it can dish out for a new GPU. I've used Newegg's PSU calculator and it cuts it close with a "new" GPU released a year+ ago.
Intel Quad 6600, Asus P5N-E SLI, GeForce GTX 560 1GB, 6GB RAM, 500GB HDD, Zalman 9700NT, X-Fi Xtreme Gamer, 650 watt PSU