UGH I'm blind. I didn't read the full model number on SM website. Thankswrong chassis. there are two variants of the 825. that one is made for the "U" (e.g., X8DTU-F) boards that use a 2U riser and allow for full profile PCI cards. you'll need to find the 825 with the "LP", which has 7x low profile PCI slots.