The thing I would do is this. I would do some kind of Video test with a video or two with both Graphics Units. The GPU you have only goes up to DX 9 when the Mobo goes up to DX 10, which is in more use these days. Also the Mobo you have only has PCIE 2.0 x16 and x1, and two PCI slots, no PCIE Native. I would try to fit the GPU into the PCIE 2.0, and obviously if it does match up with the socket, try the PCI. Do NOT push to hard or else your GPUs in the Graveyard. But if you get it to fit, make sure you can download drivers and that it at least shows your screen. From there do the video tests (even maybe a 3D game test if you want) and see which one performs and/or looks better. ^_^