How are you people getting past 4.2ghz

I've tried everything, and it still fails Ortho

what am I missing

Bios: 1702
Multi - x10
Strap - 420
CPU Front Side Bus - 333
CPU V - 1.3625v
DRam - 2.00v
CPU PLL - auto
North Bridge - auto
Front Side Bus Termination - auto
CPU GTL - auto
North Bridge GTL - auto
CPU Clock Skew - auto
North Bridge Clock Skew - auto
cpu - load on

BAtch # Q820A306

Need someone's help

Thanks