i5 2500k overclock issue-Can't Reach BIOS past 4.4 GHz

[ollypostantin]

Hello, first off this is my first post so I apologize if I do not provide all the necessary information regarding my problem. I'm somewhat new to overclocking and I currently have my Intel i5 2500k (3.3 GHz) OC'ed to 4.3 GHz running at 1.35 V (Vcore) in BIOS. The idle temps are around 30-34 C and under load 45-50 C using Prime95. This overclock currently runs perfectly stable, however, if I attempt to overclock any further, such as to even 4.5 GHz, my CPU will not even boot to BIOS and I'm forced to remove the battery from the motherboard to reset the BIOS settings. By many accounts this CPU should be able to be overclocked much further, as many report OCs near 5 GHz, and it seems as though neither the voltage nor temperature is a problem. I even tried running 4.5 GHz and 1.375 V and incurred the same problem. Is it the case that I just have an unlucky chip? Or am I overlooking something else completely?

CPU: Intel core i5 2500k @ 3.3 GHz
PSU: EVGA SuperNOVA 650 G2
Cooling: Cooler Master Hyper 212 EVO (2 fans in push/pull)
MOBO: ASRock Z68 Pro3
GPU: NVIDIA GeForce GTX 970 @ 4GB

I'd like to restate that the problem stems from the build being completely stable at 4.4 GHz to failure to even reach BIOS at 4.5 GHz. Temperature and Voltage don't seem to be the issues here so if you have any opinions on what might fix the issue I would be very grateful to receive any help!

Thanks

 

[RagingRabbits]

You can actually go a little higher with the Vcore to maybe 1.45 or 1.5 for higher clocks since your cooling seems to be doing pretty good.