t1 slotImproved GPU support up to 140 x 325mm, 3.25-Slot thick. Improved 240 AIO support up to 46mm thickness for Fan and Radiator. Improved Dual Radiator support. Overview: ... The T1Switch FormD T1 From 2-Slot Mode To 3-Slot Mode. Since the air cooled GPU we will be using is massive, we need to switch to 3-slot mode. First swap out the 2-slot GPU bracket for the 3-slot