t1 slotYes, you can, but there will be an extra slot of free space on the GPU side. The new version of the T1 (v1.2) should have 1.25 or 1.5 slot support so you can take up the least amount of spaceSpecification Model Name T1 Reference Kit T1 Sandwich Kit Model Code T1-REF-SDK T1-SW-SDK Overview Compared to the T1 - Sandwich Kit, this confuration is a better choice