Can CPU Undervolt cause Artifacting?

[dani.petro]

I am trying to undervolt my CPU a Ryzen 5600x on a Gigabyte B550 board to counter high voltage and temps in summer. All processor settings are stock and I set CPU Vcore to Normal from Auto to be able to set a offset of -0.096.

After applying this I was playing battlefield but I think I saw some graphical glitches once or twice? So can the CPU undervolt cause Artifacts in games or is it just nothing?

My PC:

Ryzen 5600x

Gigabyte Aorus B550 Pro

2x8gb ram xpg 3200mhz

Cooler Thermalright peerless assassin all fans on full

[Beerzerker]

It's possible.

Also, when you set CPU voltage to "Normal" at what voltage is the setting showing once set that way without the voltage offset?

What it's manually set for or just where it is with "Normal" related to CPU voltage will determine what actual voltage is going to the chip when offset is applied because that actual voltage value to the chip "Per offset" is based on this base value.

If you have CPU voltage set for 1.200v's manually and then you apply your offset value of -0.096v's, you get 1.104v's to the chip and that's what you'll get when all that is applied and used.
Of course it won't be "Spot on" that value but it will be very close.
If you set CPU voltage manually to, for example 1.25v's and apply the same offset value (-0.096), you get 1.154v's instead. If changing your offset value to, let's say -0.035v's with 1.25v's set manually as CPU voltage, you'd get 1.215v's from that. With 1.20v's set manually with that amount of offset (-0.035v's) you'd get 1.165v's.

BTW the same offset effect is seen if using a + offset value,  It works in the same way to the same extent determined by the base voltage value set for the chip.

Once more thing - Setting CPU voltage (Base value) manually basically eliminates the need for using offset anyway and you can just set it manually, see what happens and then forget it once you're happy with it.

So yeah, it's possible with the values you're using for offset from the looks of it, depending on what the CPU voltage base value really is as you have it right now.

[TatamiMatt]

1 hour ago, dani.petro said:

I am trying to undervolt my CPU a Ryzen 5600x on a Gigabyte B550 board to counter high voltage and temps in summer. All processor settings are stock and I set CPU Vcore to Normal from Auto to be able to set a offset of -0.096.

After applying this I was playing battlefield but I think I saw some graphical glitches once or twice? So can the CPU undervolt cause Artifacts in games or is it just nothing?

My PC:

Ryzen 5600x

Gigabyte Aorus B550 Pro

2x8gb ram xpg 3200mhz

Cooler Thermalright peerless assassin all fans on full

Could you try running a negative curve optimiser offset in PBO settings instead of a hard voltage reduction?

[dani.petro]

13 minutes ago, TatamiMatt said:

Could you try running a negative curve optimiser offset in PBO settings instead of a hard voltage reduction?

I tried -25 but it's hard crashing and restarting in games so I didn't fiddle with that setting anymore.

[PDifolco]

4 minutes ago, dani.petro said:

I tried -25 but it's hard crashing and restarting in games so I didn't fiddle with that setting anymore.

-25 all cores is too agressive, 5600x isn't top silicon, it crashes my 5900x too

Spot which 2 cores are your best ones, put them at -15 and you should be fine, with others at -25 or even -30 on 2 worst ones

 

[TatamiMatt]

5 minutes ago, dani.petro said:

I tried -25 but it's hard crashing and restarting in games so I didn't fiddle with that setting anymore.

so -25 might just be too much

-25 is quite a big jump

 

i think -30 is actually roughly the cap

 

try -20, if that does work -18/-15 or something

[dani.petro]

8 minutes ago, PDifolco said:

-25 all cores is too agressive, 5600x isn't top silicon, it crashes my 5900x too

Spot which 2 cores are your best ones, put them at -15 and you should be fine, with others at -25 or even -30 on 2 worst ones

 

 

8 minutes ago, TatamiMatt said:

so -25 might just be too much

-25 is quite a big jump

 

i think -30 is actually roughly the cap

 

try -20, if that does work -18/-15 or something

Okay so setting the negative curve offset will help with getting lower voltages and temperatures?

Will try it in asap as the CPU reaches 85C while gaming and scares me because on my previous Ryzen 3600xt I didn't even exceed 65C even in peak summer using the same cooler.

[TatamiMatt]

1 minute ago, dani.petro said:

 

Okay so setting the negative offset will help with getting lower voltages and temperatures?

Will try it in asap as the CPU reaches 85C while gaming and scares me because on my previous Ryzen 3600xt I didn't even exceed 65C even in peak summer using the same cooler.

firstly yes, thats the best way to lower voltages and temps on zen architecture the easiest (if that makes sense)

 

And 85 is perfectly fine to boot, but less heat dump into a room is always nice regardless

[PDifolco]

29 minutes ago, dani.petro said:

 

Okay so setting the negative curve offset will help with getting lower voltages and temperatures?

Will try it in asap as the CPU reaches 85C while gaming and scares me because on my previous Ryzen 3600xt I didn't even exceed 65C even in peak summer using the same cooler.

Ryzen 5000s are hotter or at least jump temps more aggressively than 3000s (had a 3900X previously)

Yet 85C in gaming on a 5600X is out of whack, you have a pretty good cooler, is it installed properly ? Or maybe your fan curve is too low

My 5900X don't even reach 80C in gaming on a 280mm AIO, usually games around 70C (with -15 to -30 CO undervolt), so you should be in the 65C range (less wattage, lower clocks)

[dani.petro]

39 minutes ago, PDifolco said:

Ryzen 5000s are hotter or at least jump temps more aggressively than 3000s (had a 3900X previously)

Yet 85C in gaming on a 5600X is out of whack, you have a pretty good cooler, is it installed properly ? Or maybe your fan curve is too low

My 5900X don't even reach 80C in gaming on a 280mm AIO, usually games around 70C (with -15 to -30 CO undervolt), so you should be in the 65C range (less wattage, lower clocks)

I use Arctic MX4 with a X pattern and ambients reach 38-40C now. The fans on the cooler are on full. 

[TatamiMatt]

44 minutes ago, dani.petro said:

I use Arctic MX4 with a X pattern and ambients reach 38-40C now. The fans on the cooler are on full. 

Whats the temps when under load?

 

after that and depending on temps;

is it torqued down enough?

What other airflow, case fans, case setup etc do you have?

[PDifolco]

49 minutes ago, dani.petro said:

I use Arctic MX4 with a X pattern and ambients reach 38-40C now. The fans on the cooler are on full. 

Ambient 40C yikes !  How can you even survive that ?  

[dani.petro]

3 hours ago, PDifolco said:

Ambient 40C yikes !  How can you even survive that ?  

Trust me, 40C is low. Weather reports say that it will increase to 45C peak summer. 

[dani.petro]

3 hours ago, TatamiMatt said:

Whats the temps when under load?

 

after that and depending on temps;

is it torqued down enough?

What other airflow, case fans, case setup etc do you have?

The temps in gaming is around 82-83C but in benchmarks and OCCT stress test its lower at around 76-78C.

The case is a CK500 from Deepcool. Front fans are FK120 x3 full speed, top x2 and back exhaust are FC120 full speed. So airflow is pretty decent I guess. 

The cooler was torqued down till the spring loaded screws locked and couldn't be tightened any more. The screws were tightened with half a turn in an alternate pattern.

[PDifolco]

2 minutes ago, dani.petro said:

The temps in gaming is around 82-83C but in benchmarks and OCCT stress test its lower at around 76-78C.

The case is a CK500 from Deepcool. Front fans are FK120 x3 full speed, top x2 and back exhaust are FC120 full speed. So airflow is pretty decent I guess. 

The cooler was torqued down till the spring loaded screws locked and couldn't be tightened any more. The screws were tightened with half a turn in an alternate pattern.

Only weird thing is that usually Ryzen temp are better on gaming (cause all cores aren't used) than in OCCT/CBR etc 

But with 40C ambient that's pretty good, it translates to 65C gaming 60C benchmarking with a more human 22C ambient  

[dani.petro]

1 hour ago, PDifolco said:

Only weird thing is that usually Ryzen temp are better on gaming (cause all cores aren't used) than in OCCT/CBR etc 

But with 40C ambient that's pretty good, it translates to 65C gaming 60C benchmarking with a more human 22C ambient  

Although I play only two games which are Apex and BF1, both of which seem to be Cpu intensive.