CPU speed throttling at 50C. Why?

sonic_boom81

Commendable
Aug 27, 2016
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0
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My CPU drops it's speed to about 1.6 GHz when it gets to 50C (sometimes up to 54C).

AMD FX8370E overclocked to 4 GHz just now and drops at 50C while using Prime95 and HWMonitor.
CPU over voltage 1.32500.
Motherboard is ASUS M5A78L-M/USB3 which isn't the best for overclocking.
16 GB RAM
GTX 1050 Ti

I've tried up to combinations of overclocking to 4.3 GHz voltage 1.34, and it was reducing it's CPU speed at 54C. But it seems to be random at what temperature it reduces at each time I try a different config.

I can overclock the CPU/increase the voltage higher and the system is stable, but the CPU drops it's speed frequently even when idle if I go too high.

It's an issue when playing games, as when overclocked, frame per seconds drop when the CPU slows down to cool for a few seconds. From 30 to 15fps in CPU intensive games.

This CPU is meant to get to 4 GHz without issue, and some people taken it to 4.5+ GHz.

So is it my motherboard that's stopping the CPU getting hotter? I believe it's meant to be okay up to 61C.
 
Yup, my guess would be VRM throttling too. Budget AM3+ motherboards run 125W CPUs quite terribly in most cases and overclocking essentially makes a 125W CPU. This is not the type of motherboard you really want to be using for overclocking.
 
It looks like there is not VRM temperature sensor on this board. Is there anyway to improve things with this board assuming it's VRM?

If not, what's a good AM3+ board for my set up?