Need help OCing for 2500K

[smiies]

Hi. My com specs are

CPU: Intel i5 2500k
Mobo: Asus P67P8
Cooler Master Extreme Plus 650W
Ram: Cosiar 8GB (2 x 4GB) DDR3 1600 (Clocked to 1866)
Stock Intel CPU Cooler
COOLER MASTER Eilte 430 Black Case.
Exhaust fans: OYXN 120mm in the back, two OYXN 120 mm Case Fans on the top, one OYXN 120mm in the bottom (intake), one OYXN 120mm in the front (intake)

My settings are

FSB 100
Multiplier - 43x
Internal PLL overvoltage - Enabled
Memory Fre - DDR3 1866
EPU - Disabled

LLC - Ultra High
VRM Fre - 350
Phase control - Extreme
Duty control - Extreme
CPU Capability - 110%

VCORE 1.225
DRAM - 1.600
VCCSA - auto
VCCIO - 1.175
CPU PLL - 1.75
PCH - auto

I am a first time overlocker and have tried lots of different settings. And I am getting no where with the tweaking... I would like to keep the VCORE as low as posible with the CPU @ 4.3Ghz. But however if i lower the VCORE any lower than 1.225 i get 124 error shortly after booting into windows. I will appreciate help on tweaking the settings to keep the VCORE as low as possible @ 4.3Ghz. Thanks!

 

[venjhammet]

I had mine at 4.2ghz, vcore 1.255. Ran Prime95 8hrs pretty much stable temp max 72c (ambient 33c it's quite hot here in our country). Though I haven't tested same vcore at 4.3ghz yet. I had it at 4.7ghz vcore1.355 but max temp was 78c and I don't like that temp so I just settle at 4.2ghz. I also had C1E enable so that cpu speed would speed down on idle. I'm using a MSI P67A-GD65.

 

[Leaps-from-Shadows]

It seems you've already determined the minimum voltage required for your system at 4.3GHz. 1.225v is perfectly acceptable. There aren't any tricks or tweaks to do any more than that. What more help do you need?

 

[Griffolion]

If you're running errors at anything below 1.225v then you've found your lowest possible voltage.