The max IPC is with max clock CPU + max clock NB and max clock RAM
Linx 4,2GHz 1,5Vcore - NB 2,8GHz 1,2V - DDR3 1868MHz 9-9-9-24-33
Error, but 4,358GHz a 1,524V...
NB too high and DDR3 too high
Is OK but with NB to 2,2Ghz not good IPC.
4,323GHz a 1,55Vcore