Motherboard compatibility isn't really a thing these days. The GPU question is what *exact* PSU you have, as "700 watts" doesn't say very much.
I bought this from EasyPC, I guess they aren't legit despite the positive reviews I've read. How about Inplay Gear's True Rated GS550-ULTRA 550W 80Plus ATX Power Supply,? It's being sold from their flagship store. If not, I guess I'll go into some PC stores and diligently look there. Thank you by the way!Is this your power supply? This is all that comes up for Intelligent 700W.
If so, you will definitely need a power supply. This is a fake 700W PSU. It's not even a 200W PSU. It's basically a 180W PSU, and a bad one at that. You can't buy real PSUs for the equivalent of $7 US.