7mm offset shifts the heatsink directly over the hotspot of AM5 Ryzen CPUs, better contact over the processor's CCD(s) typically improves temperatures by 1-3°C For Noctua CPU coolers with 83mm mounting pitch that require mounting bars on the west (left) and east (right) side of the AM5 socket for optimal orientation Compatible with Noctua NH-U12, NH-U12F, NH-U12P, NH-U12P SE2, NH-U12P SE1366, NH-U9, NH-U9F, NH-U9B, NH-U9B SE2 Please double check heatsink compatibility before purchasing! NM-AMB13 can only be used for the models mentioned above, please choose NM-AMB12, NM-AMB14 or NM-AMB15 for other models Bars can be installed in standard (0mm) or offset (-7mm) position