Check your settings to see if you're exceeding safe limits.
Check your settings to see if you're exceeding safe limits.
I've achieved 4GHz at 1.3v on my 6800k, though some sources indicate 4.2 at around 1.25v, which makes me wonder if I'm making a mistake. 4.1 was unsuitable at that setting. My setup includes an ASUS X99 ROG, 16GB Corsair Vengeance 2666 with XMP enabled, and an EVGA 650G2 PSU. The CPU voltage is manually set to 1.3v in BIOS with a sync core multiplier of 40. I've only adjusted what was changed by applying XMP to the 2666MHz profile. It's possible the CPU isn't receiving the full 1.3v as intended, or there might be another factor at play. HWinfo shows 1.31v under maximum load, which adds to the confusion. I'm not entirely confident about advanced overclocking methods and could be missing something.
The performance varies widely among chips, depending on the voltage needed for stability. Some may not even achieve the desired speed. I checked a marketplace where chips are sorted before sale; they reported that 92% of the tested 6800K chips reached 4.2 at around 1.312v, while only 73% hit 4.3 and required much higher voltages. Results are inconsistent—sometimes you win, sometimes not.
It's not great, but that's what I was considering. I heard playing with load line calibration could be useful, so maybe I'll try that next. If not, I'll experiment with adjusting the voltage back at 4GHz to lower the temperatures.
It seems like a solid strategy for me. It’s possible the voltage might be falling too much under heavy use to remain stable.
The highest temperature I observed was 70°C on core 2, with the rest around mid-60s. In theory, I might be able to increase it slightly more, though I'm not certain. The HWinfo and CPU-Z reports show 1.31v VID under load, but I'm unsure if they include that scenario.