I actually don't have the desktop itself, I have the board, and I put an i7 860 I had laying around in the board, with 8GB of mismatched DDR3. I have a late 2009 Macbook running mavericks, and it has the Sierra installer, and I can probably download the High Sierra installer. I also have the installation disks for OSX Snow Leopard. I think I'd prefer to have sierra at least on my system, but if it's easier to run Snow Leopard, then I'd be happy with that. Where should I begin with the hackintosh process?
I should also mention that the GPUs I have available to me are a Radeon HD 7770 1gb, a GT 630 1gb, a GT 630 4gb, and a GTX 750.