t1slotDid the opposite (2 to 3 slot) , and was not that hard. I removed my fan120aio, the struts on both sides and the psu & cables (had to reorganize to prepare for the 6800XT with 2x8pin,W360 knows there's confusion about the differences between all of the new T1 confurations, so he made this (super) helpful graphic to clear some things