Hi, there are some forums where they put in a pcie x16 card to a pcie x8 slot. Need to either cut the mobo pcie x8 blockers or need make slots in the pcie x16 card so can slot in the mobo x8 slot. Seem like being done well and running using both methods. Will be getting a server mobo soon and will try to put in x16 pcie card using the latter way...better damage the gc than the mobo !!