Fine tuning settings for an E7200 on a P5K Pro

Currently stable at 3.6ghz (9x400) but requires 1.393 vCore bios/1.368 load. Real Temps are 33c idle/52c load so I think I have more headroom here but I would like to keep the vcore below 1.4v. It starts to need much higher vcore to stabilize higher FSB which I think could be improved on with finer tuning of the other voltages. Besides disabling C13 and speed step, locking the PCIe, setting GTEL at 63%, FSB strap 400, and vCore I returned the other settings to Auto after playing with them a little. I am not that familiar with all the variables of the ASUS bios yet so anyone have some suggestions to optimize the bios and maybe allow me to get a higher OC at a lower vcore?