the 750a SLI is simply a chipset, we need to know the actual model of your board, im using a 750a board currently, and it can take from the weakest sempron to the x6, its all about ur board specs
I already know the board. XFX only released one AMD board with that chipset. But the last time I was on their site, you had to create an account and log in to access the bios info. I will leave that to the OP.