I have an ASUS CM 6870 US 2AA and I want to get a new case for it, I've installed a GTX 760 and 750w Gold PSU. I was looking at the CM 690 III w/ Seidon 120v. It says it supports ATX and Micro ATX Motherboards. I'm not sure what size my motherboard is though, I'll have a link to an album of pictures of the motherboard, I know it is an H77 from ASUS but when I look at the ones they have, none of them look like my board. They guy at my local PC store said that the board may have custom spaced standoffs and that that might be a reason it wouldn't fit. I guess what I'm asking here is will my motherboard fit in the Cooler Master 690 III?
Album of Motherboard:
http://imgur.com/a/4nqVg
Album of Motherboard:
http://imgur.com/a/4nqVg