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Undervolting i9 9900k

This is a discussion on Undervolting i9 9900k within the Other Hardware Support forums, part of the Tech Support Forum category. Currently running at 5GHz all cores at 80C (average) and 1.37V. I know this is quite a "high" undervolt but


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Old 06-29-2020, 10:39 AM   #1
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Currently running at 5GHz all cores at 80C (average) and 1.37V. I know this is quite a "high" undervolt but wasn't able to get something lower. Is it even good? I've read that an excellent undervolt would get me to 1.25V (stupid silicon lottery... ^^)

Temps do reach 90C by spikes on some cores, should I be worry?


I've only touched the DVID, do you think that tweakin other setting would allow me to get lower?
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Old 06-29-2020, 10:52 AM   #2
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Since Intel's own specs show the maximum end of "within normal limits" is 100C, 90 still has a lot of breathing room, particularly if that only occurs occasionally and in brief spikes.

See: i9-9900K Specs at ark.intel.com
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Old 06-30-2020, 09:18 AM   #3
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Definitely ok with the specs, although I wouldn't want to run it 24/7 like for folding as it will shorten the life of the chip.

Tuning your fans, GPU, CPU, case will give you even more headroom.

This is what I have to do on my folding rigs.

I'm not suggesting you fold but giving an example of sustained heat management.
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