I know the difference between 4.5 and 4.4 wouldnt be significant but I just had 4.5 as my target clock in my head, nothing crazy like 4.8-5.0 a nice modest 4.5GHz. So is that voltage safe (1.35v) ? Should I lower it ? 4.4GHz was taking about 1.275-1.28v to seem stable. possible Intel changed the glue thickeness on the PCB? Anyone have insight into this ? I have not delidded it. Its taking a lot of voltage to get 4.5GHz out of my 4670k from what I have been reading but its running cooler as well for the voltages I've put into it. On temps I was actually expecting them to be higher (90c-100c range) coming from Sandy Bridge but those are about the same as I was getting before. I dont want to burn it out in a year like I did my i5-2500k (not surprised though 1.45v 24/7 4.5GHz :< ) it would BSOD even after putting back to fail safes I don't want to degrade my chip to quickly I would like this chip to last me for 2-3 years. My temps never got above 77c max on any core and averaged 70c during that quick 20min test but I'm still worried about the Vcore being that high.

No real stress testing down yet except a quick 20min run in AIDA64. The Haswells I've seen either don't have a BIOS option to disable HT, or (on E7) won't boot up with HT disabled. Every stress test and benchmark will have different ways of testing your chip.

Intel burn test uses calculations that are specifically designed to heat your CPU as far as it will go. I'm up to 1.35v Vcore now and so far its the lowest voltage I have been able to use to get into windows. On the Haswell, allowing applications running on Intel OpenMP to use more than one thread per core seems to depress Turbo boost, cutting performance of interspersed single thread regions. You will see a vast difference between Intel Burn Test and other stress tests and benchmarks when it comes to your regular load temps. I'm trying to nail down a stable 4.5GHz oc on my i5-4670k and I'm reading some places that I should stay below 1.3v Vcore at all cost. Bulk storage: WD Caviar Blue 500GB, 7200RPM, 64MB Cache HDD (59) Optical drive: Lite-On SATA DVD-R (18) PSU: FSP Group Raider 450W Haswell-Ready Power Supply (55) Total cost for the hardware at. Tl/dr: is a Vcore of 1.35v safe for 24/7 oc without blowing up my i5-4670k ?

Intel burn test haswell