i have asus p5qpl am with e 7500 processor 2gb ddr2 ram . Power supply 500w.
Which is the best graphic card for this confg. I m planning to buy hd 6670. Will it work as my motherboard supports pci 16x .1.1.
Most likely it will work. There have been some rare cases where a PCI-e 2.1 card does not work in a PCI-e 1.1 slot.
Some people say it is because the PCI-e 1.0 or PCI-e 1.1 slot was not implemented properly on motherboard by the manufacturer. It is difficult which motherboards have this issue unless someone has already posted about it.
As I said, this issue is pretty rare. You may want to go to Asus' website to look for an updated BIOS that addresses this issue... if it exists and if Asus bothered to correct it.