t1 slotEach slot is 5mm. Moving from 2 to 2.25 would be 40mm to 45mm. GPU measurements are rarely 100%, mm perfect though, often there's littleI think different slot mode in T1 V2 won’t affect gpu temp much as long as there’s a decent space between the flow through fan of the 4090 and the PSU (we create this by off set the psu or