Underclock to reduce fan speed

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wrightcolin

Commendable
Aug 11, 2016
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Hey everybody... So about a month ago I bought myself an AMD FX-8300 to replace my shitty old Pentium E6700 *Snort*. That thing was a joke... Anyways, I bought a Gigabyte 78LMT-USB3 to go with it, which only has 2 fan headers. Not that my case is big enough for more than 2 fans. My fans now run right around 4000 RPM, which makes slightly less noise than the Large Hadron Collider, and is about twice as annoying. What I'm wondering is, since 8 physical cores is overkill for just about anything, will underclocking from 3.3 GHz to 2.5 or maybe even 2 GHz decrease my fan speed, and how much will this affect performance (Specifically for low end gaming)
 
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Ecky
Most games are limited by the speed of your slowest core, and do not effectively use more than 2-3 cores, and the same is true of most desktop applications. That's why a $120 Core i3 generally outperforms a $150 FX-8xxx in gaming and general desktop use - it has only 2 cores, but those cores are at least 75% faster than any of the cores in an FX CPU. A better way to cut power use would be to disable 2-4 of your cores and leave the clockspeed alone.
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Stysner

Reputable
Apr 9, 2015
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4,960
You don't need to do that. If the fans spin at that same RPM regardless of the usage / temperature, you should change the fan settings in the BIOS to something that adapts.

I would not underclock it, that's just waisting the potential of the CPU.

Buy yourself a cheap(ish) aftermarket cooler like the 212 Evo or the TX3-Evo, don't know where you're from, but they cost around 20-30$/€ and are very quiet.

Underclocking won't do anything, you would have to undervolt it. If you underclock it, it will still use the same amount of power, and get just as hot as it does now, but run slower.

If you're not sure what you're doing, better look up how to undervolt properly before you try anything. But just buy an aftermarket cooler, easiest option.
 
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Ecky

Ecky

Illustrious
Feb 3, 2013
7,592
2
38,960
Most games are limited by the speed of your slowest core, and do not effectively use more than 2-3 cores, and the same is true of most desktop applications. That's why a $120 Core i3 generally outperforms a $150 FX-8xxx in gaming and general desktop use - it has only 2 cores, but those cores are at least 75% faster than any of the cores in an FX CPU. A better way to cut power use would be to disable 2-4 of your cores and leave the clockspeed alone.
 
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