I have DFI LanParty UT nF4 Ultra-D motherboard and I have a very old GPU (X800XL) and I wanted to upgrade to the Gigabyte GT 240 512MB videocard. Problem is my motherboard is a PCI-e 1.0a and the GT 240 is a PCI-e 2.0. I've done my research but haven't come to a conclusion and am hoping the members of TH can help me out
GT240 will run on your slot no problems at all. The vid card is not fast enough to even saturate full PCI E 1.0 speed. Buy the card. I may make a recommendation though. Nvidia 9600gt is a much better buy and much cheaper.
Actually for the most part the GT240 is between the 9600 and 9800GT. The question is how much are you spending on it and if there is a better cheaper card out there. The 9800GT might be a better buy, as would the 4770 or 4830/4850.