I have just assembled my newest computer creation. It's based on Gigabyte's GA-Z77X-D3H mobo, an Intel i5 3570K processor, and Kingston Hyper-X RAM. When I first tried to fire it up, I got no video (I'm using the Intel integrated graphics). I've put together numerous systems over the years, but I've never had this problem, and I don't know where to begin. Is the problem most likely with the CPU (I could swap it out for another), the motherboard itself, or perhaps the RAM is incompatible (KHX1600 C9D3K2/8GX). Ideas, anyone?