3900x cooler after overclock

[LUK]

hi,

 

I overclocked my 3900x to 4.0 GHz, only changed the ratio, left everything else at stock. Here is what happened.

 

CB R15 score is the same (around 3110)

CPU voltage dropped from 1.478 to 1.304 as well as CPU temp. that went from 45 to 37 C (as shown in BIOS).

 

Otherwise, manually undervolting it results in performance penalty (2885 cb score).

 

I am running the newer BIOS (AGESA 1.0.0.4)

 

Why does it come to this and what to do?

 

Thanks in advance.

[Skiiwee29]

I wouldnt call 4.0ghz an overclock when your all core turbo boost is likely the same if not slightly higher... my 3700x all core turbo is about 4.1ghz and I can manually set my CPU to 4.2ghz at 1.35v if I wanted. 

[Nexxt]

It turbo's to 4.6 GHz from 3.8 GHz, you down-clocked it, not over-clocked. Try an all-core 4.4 GHz or something and you'll get back up to those voltages.

[LUK]

4 minutes ago, Skiiwee29 said:

I wouldnt call 4.0ghz an overclock when your all core turbo boost is likely the same if not slightly higher... my 3700x all core turbo is about 4.1ghz and I can manually set my CPU to 4.2ghz at 1.35v if I wanted. 

I have a 4,1 ghz all core turbo as well, but why are the voltages and temps so high if you leave all the settings at stock?

[Skiiwee29]

Just now, LUK said:

I have a 4,1 ghz all core turbo as well, but why are the voltages and temps so high if you leave all the settings at stock?

Its normal. AMD has the stock voltages set high at idle so there is room for the boost when a load is applied. When a load is applied, watch your voltages, they will usually go down into the low 1.0-1.1 range. 

[Otto_iii]

 

Check your voltages coming out of idle/sleep states with a programs like HWMonitor, CPU-Z etc, if you see spikes to 1.5V instead of a steady 1.325V (or what you have it set to, 1.325 being considered safe voltage for overclock) then use Ryzen Master, and keep it open (minimized) while using overclock.  This might not be a problem on all motherboards or BIOS updates but its worth checking for.   I found if i applied OC with BIOS, or if i applied it in Ryzen Master then shut it down for some reason i got very high reported voltage spikes coming out of sleep states.  Not sure if its just a reporting error, but since id like to avoid 1.5V spikes (even if by default it spikes to 1.45v) i'd prefer it, so i keep Ryzen Master open and minimized if i want a OC.

Doing that, (1.325v with 4175 ccx0 4225 ccx1) for my 3600 gives me about 3-4C lower temps under sustained load (roughly going from 74C to 69C under load) while getting about 6-8% higher results in CPU benchmarks (1680 R15, 3775 R20) , reported total wattage/power usage in HWMonitor stays same as stock.  But im on a older BIOS

You can still get lower temps at 1.325V on some boards with higher clock speed multiplier, feel free to go above 4000, but if you have a motherboard that has a official, working 1.0.0.4 BIOS update i'd recommend just using that as it will likely hit the same clock speeds, less hassle, and ofc is the way chip was designed to be used

Finally, GamerNexus somehow got way higher temps, and way worse power consumption at 1.325V on a MSI GODLIKE motherboard, so on some boards this may mean 1.325V overclocks is a mistake, or it might mean they have other things going on in their overclock that screw up its power consumption and temps needlessly. Just something to watch for.
 

1 hour ago, Skiiwee29 said:

Its normal. AMD has the stock voltages set high at idle so there is room for the boost when a load is applied. When a load is applied, watch your voltages, they will usually go down into the low 1.0-1.1 range. 

It has (should have) high stock voltages coming out of idle, on individial cores as they come out of sleep states or boost up, not "at idle" 
semantics 

 

1 hour ago, Stru said:

It turbo's to 4.6 GHz from 3.8 GHz, you down-clocked it, not over-clocked. Try an all-core 4.4 GHz or something and you'll get back up to those voltages.

 

If you are on a some older b350/b450/b470 boards that are still stuck on a older BIOS, as there aren't 1.0.0.4 ABBA updates released for everything yet, then you can get stuck at roughly 4.0-4.1mhz (or if higher, still much lower then rated speed) and with higher temps then needed.