What was your original motherboard? What do you mean that your GPU is incompatible with the MSI motherboard?
My previous motherboard was M2N-E-SLI, as old as my GPU
I checked up the Graphic Card compatibility list on the MSI website for the 1155 socket Mobos, couldn't find a single one that supports my 8800gtx.
There's either a jump from in the list from 8400 to the 9500 or 200+ series for almost all the MSI mobos.
I googled a bit and found a topic where a member said that his 8800gtx was incompatible with the Z68A-GD65 (G3) Mobo... I was so keen on buying that Mobo.
Found a compatible mobo at ASROCK P55 Deluxe 3 but that is socket 1156
I don't want to go for the 1156 socket cuz the top end i7 processors for that are a bit expensive when compared to the i7 2600k