The I7 6700k Core voltage remains unstable regardless of adjustments.
The I7 6700k Core voltage remains unstable regardless of adjustments.
Hey everyone,
I increased my 6700k to 4.7GHz using an Asus z170s sabertooth motherboard, but the core voltage keeps changing.
In the BIOS it’s set to manual mode at 1.350v, and all cores are synced—everything looks normal.
However, when I boot Windows, both CPU-Z and NZXT’s Cam software report voltage fluctuations.
It drops very low to around 1.200v and sometimes spikes up to 1.44v.
I’ve tried XMP and manual overclocking with both adaptive and fixed voltages, but the issue persists.
Even after resetting everything back to defaults (choosing “Load optimized defaults” in BIOS), the voltage still fluctuates up to 1.4v.
The BIOS has been updated already, but it hasn’t resolved the problem.
Bios links:
http://imgur.com/nLKHWeu
CPU-Z and Cam with CPU at stock speed and voltage:
http://imgur.com/2P1ilvO
If you have any ideas about what’s causing this, let me know.
I hear what you're saying...
But then in your pictures it shows it being pretty spot on - 1.34 is damn close to 1.35.
You mentioned seeing it spike as high as 1.44 even with the manual setting of 1.35? That would be a bit unusual.
Some fluctuation is normal, but not that significant.
Can you adjust your CPU to handle heavy loads? What voltage do you get under continuous heavy load?
I understand what you're referring to...
However, looking at your images, it appears very accurate - 1.34 is nearly identical to 1.35.
You mentioned observing spikes up to 1.44 even when using the manual setting of 1.35? That seems unusual. Some variation is normal, but not this large.
Could you adjust your CPU to a heavier workload? What voltage would it be under continuous heavy load?
In the picture, it runs at its standard speed with auto voltage enabled, which is quite high.
When under heavy load, it behaves similarly to idle conditions (tested with aida64 for an hour, max was 1.44v and minimum around 1.27v)
Currently performing an AIDA64 stability check with all components at default settings, achieving voltage surges up to 1.42v.
BossBolognese is currently performing an AIDA64 stability test with all components at default settings, experiencing spikes up to 1.42v. Are you using a manual Vcore? Have you applied any LLC settings? Are turbo, EIST, and energy savers disabled during your overclocking process? I prefer CPU-Z, but also use HWMonitor for its current, minimum, and maximum readings. I also find OCCT useful because it provides clear charts at the end, helping you track trends over time.
BossBolognese shared their experience with aida64 system stability test. They are running everything at default settings and observing voltage spikes reaching up to 1.42V. They are asking about manual Vcore usage, LLC application level, and whether turbo, EIST, and energy savers are disabled during overclocking. They mention using CPU-Z for monitoring but also HWMonitor for current, minimum, and maximum readings. OCCT is used for trend analysis in completed runs. They also report issues with voltage fluctuations on hardware monitor, noting that disabling most settings except Turbo stopped the fluctuations but lowered the CPU voltage significantly—now sitting at 1.116V instead of their target of 1.3V at 4.8GHz. They set LLC to 5 and re-enabled Turbo, which restored the speed to 4.2GHz.