7700K overclocking at 1.25 V under high temperatures
7700K overclocking at 1.25 V under high temperatures
Hello
Today I purchased the 7700K as an upgrade from the 6600K. I'm still getting familiar with overclocking, but I wanted to find out how well this particular chip performed. My motherboard is an Asus Sabertooth Z170 S with air cooling. I might apply a very thin layer of thermal grease (Thermal Grizzly Cryonaut—it's quite thick...).
In UEFI I set the voltage to 1.25 V and it ended up with fairly high temperatures (~87°C), which made me think, "This is ridiculous! I'm going to return it tomorrow." (I'm used to 1.35 V in UEFI for Skylake and that was what I expected). But then I realized I could double the frequency by 49x100 MHz, so things are now stable after about an hour in OCCT.
I'm a bit worried about those high temperatures. Sure, it could be my fault, but I've noticed most people reach above 1.3 V without issues.
More to worry about is whether the values I enter in BIOS are accurate. Both UEFI and OCCT show the core voltage as 1.25 V via the built-in HW Monitor, but CPU-Z and HWMonitor display an unstable VID reading above 1.31 V. Seeing 4.9 GHz at 1.25 V seems a bit too high for me. At 1.31 V it would be more plausible (based on my recent research).
And lastly: the 6600K ran in the same setup at 1.35 V, 4.6 GHz, never exceeding 80°C.
PS: Why does VIN0 show a value of 60 kV???
😀
Thanks for all the advice!
A crucial piece of information is absent. What device are you employing?
Mustella :
Hello
Today I purchased a 7700K as a minor upgrade from the 6600K. I'm still getting familiar with overclocking, but I was wondering how well this particular chip performed. My motherboard is an Asus Sabertooth Z170 S with air cooling. I might apply only a small amount of thermal grease (Thermal Grizzly Cryonaut, it's quite thick...).
In UEFI I set the voltage to 1.25 V and it led to fairly high temperatures (~87°C), which made me think, "This is ridiculous! I'm going to return it tomorrow." (I'm used to 1.35 V in UEFI for Skylake and that was what I expected). But then I realized I could double the frequency by 49x100 MHz, so now I feel more at ease (stable after an hour in OCCT).
Still, I'm a bit puzzled about those high temperatures. Of course, it could be my fault, but I've noticed most people manage to keep above 1.3 V without issues.
What worries me more is whether the values I enter in BIOS are accurate. Both UEFI and OCCT show the VCore at 1.25 V, but tools like CPU-Z and HWMonitor display unstable readings above 1.31 V. Seeing a 4.9 GHz clock at 1.25 V seems unusual for me. For 1.31 V it would be more plausible (based on my recent research).
And lastly: the 6600K ran in the same setup at 1.35 V, 4.6 GHz, never exceeding 80°C.
PS: Why does VIN0 show a value of 60 kV? 😀
Thanks for all the advice!
You have much to learn about overclocking, but just being curious and taking these steps clearly shows your determination to succeed.
True. I'm only considering the multiplier and VCore options. Still, I find the cooler to be a good choice. It maintained 6600k at low temps (70-80°C). However, it doesn't handle much current from the CPU. Perhaps that's due to the CPU's performance.
Mustella confirmed. I’m sticking to multiplier and VCore only. Still, I find the cooler reasonable. It maintained 6600k at low temps (70-80 deg C). However, it doesn’t handle much current from the CPU. Perhaps this is due to the CPU’s thermal properties. Have you checked if the cooler was installed properly? Look at its thermal footprint on the heat spreader. A direct touch heat pipe cooler really needs thermal compound applied between the tubes and the heat sink base before attaching it to the CPU. The die of the 7700K is positioned perpendicular to the clamping wings on the heat spreader. I usually apply a thin TIM layer directly over the CPU die area before mounting the cooler. If you can reach 4.9ghz with an air cooler on the 7700K, it’s definitely a solid choice.
If by "thermal footprint" you refer to the extent of IHS and heat sink covered by thermal grease, I understand it should be fully applied—typically covering the entire area. At first, I considered the layer too thin, so I removed the device and re-applied grease, but it didn’t make a difference.
I purchased this cooler in a special edition and its appearance is as follows:
https://www.google.pl/url?sa=i&rct=j&q=&...2884375069
Despite this, the heat sink surface remains completely coated with grease, showing no gaps.