Your only limiting feature will be your PSU. Even the 8800 GTX used PCI-E (16x) which is what all of the current generation also use. So in other words your mobo will be able to handle any of the new GFX cards on the market. The only down side is the new cards will be much more power hungry than your 8800 GTX. From memory the 8800 only used 1 6-pin power connector whereas say a GTX570 will required two 6-pin or in some cases a 6 and an 8-pin
thanks all, now i have a battleplan, buy 560ti with this months pay (plus holiday) and next month i can afford the rest of the pc! HUZZAH CG SAVES THE DAY