I am looking for a PCI Express card and if the memory in my computer is DDR Does video card also have to beDDR

I see that the video cards i find are not DDR and they are DDR2 or somthing else does that matter or does the video card also have to be DDR. Also the game I have says it has to be 100% direct 9 compatible would a Direct 10 work for that.|||No. The video card and the PC don't need to have the same type of memory. Directx 10 should work fine for a game that requires 9.