7mm offset shifts the heatsink directly over the hotspot of AM5 Ryzen CPUs, better contact over the processors CCD(s) typically improves temperatures by 1-3°C For Noctua CPU coolers with 78mm mounting pitch that require mounting bars on the west (left) and east (right) side of the AM5 socket for optimal orientation Chromax.black version ideal for NH-U12A chromax.black, NH-U12S chromax.black and NH-U9S chromax.black Compatible with Noctua NH-U12A (chromax.black), NH-U12S (chromax.black), NH-U12S SE-AM4, NH-U12S redux, NH-U14S, NH-U9S (chromax.black) Please double check heatsink compatibility before purchasing! NM-AMB15 can only be used for the models mentioned above, please choose NM-AMB12, NM-AMB13 or NM-AMB14 for other models