This is my computer. http://m.tigerdirect.com/products/5287092 I need to know what motherboard size this is and if I can replace it. If I can replace it what other motherboard can I replace it with that will be able to support an Intel core i5 4790? Sorry for bad spelling. It is a low profile computer and I added a low profile GeForce gtx 640. Anyway what size motherboard is this and can it be replaced with a different motherboard to support newer cpu?