Does GPU Size Affect Performance? Graphics Card Form Factors

DA2 – Vertical GPU Kit 3 slot gpu thickness It measures 228mm in length and is 39mm thick, with dual 90mm fans and triple cooper pipes for cooling The GPU offers up to 2581MHz boost clock 30 slot classroom mailbox So basically what I need to look at is the widththickness of the card? And where the card fits, so will the other one, logically

383 slot 2 x 120140 mm fans with slot GPU in 4 slots GPU mode PCIe standard Vertical front GPU in 3 slots : 314 mm length and 120 mm width