• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

5000 Series Undervolting

Grim5 said:
When I set my 5950x to stock, voltage at single core max load = 1.45v, voltage at multi core max load roughly 1v +-0.05v

So that's the stock behavior. If I enable PBO, single core voltage is exactly the same, multi core max load voltage jumps up to 1.29v

So as far as I'm concerned 1.29v is safe for overclocking because when I give the CPU free reign to boost as high as it wants to it will go up to 1.29v

Highest I've tested for all core manual overclocking is 1.25v, I reached 4.6ghz all core with that
Click to expand...

I would agree with that.

I look at my loop delta. I’m am trying to keep it low while keeping the performance high. Makes it an efficient and silent system.
 
Hey guys/girls.
Found this thread after trying to undervolt my 5900x on my Tomahawk B450 max board and hoping some nice people can help me once again.
I've enabled advanced PBO, set PBO limits to disabled and changed all core co to -30. I'm now getting a Cinebench R23 score of MT 22021 and ST of 1625 (up from 20935 & 1603 stk). With Aida 64 (most recent version) on a 20 min stress test of cpu,fpu,cache and system memory I get an average of just over 4600 on all cores and max temp of 70.1 c and average cpu core of 1.276.
Downloaded the most recent version of prime 95 off guru3d (haven't ever used for amd before), ran a quick small fft (maximum power/heat/cpu stress) but was only averaging 3800mhz and with a quick large fft the core voltage was averaging 1.37 and just over 4800mhz on all cores (all on 24 threads), needless to say I stopped it after 4 mins. Does this sound right or safe to you specifically the voltage on prime?
Edit: just this moment had a restart on desktop idle so obviously not stable - will have to look at.
 
Scores look ok. I was running Prime Large FFT at 1.0v but was also running an offset. See previous attachments.

LLC should help with stability at idle. Have a play and monitor your voltage with Hwinfo
 
The Asgard said:
Scores look ok. I was running Prime Large FFT at 1.0v but was also running an offset. See previous attachments.

LLC should help with stability at idle. Have a play and monitor your voltage with Hwinfo
Click to expand...

Thanks Asgard.

Just added a negative .10 offset and LLC level 2.
After 20 mins of prime large FFt's HWInfo reports:
cpu core vid voltage average: 1.315 (I believe this is a made up number from intel overclocking - I'm new to hwinfo)
cpu core voltage(SVI2...) average 1.316 (I think this figure is the closest to actual voltage-could be wrong)
Average of 4760+ Mhz on all cores.

Aida reports similar voltages but Ryzen Master is showing 1.41 volts.
Cinebench shows a similar MT of 22045, ST is down a little at 1590 - might try to increase clocks a little.

Couple of questions, I have near to your levels of power saving, -30 co all cores and -1.0 offset yet my voltages are significantly higher and Ryzen Master shows dangerously high MT voltages, does this look safe to you or is something amiss.

My B450 Tomahawk Max should be similar to yours, would I see any benefits from moving my LLC to 5 from 2 if 2 is stable and would 5 increase the voltage or lower it under load?

Once again thanks for the help, coming from intel oc'ing, AMD seems pretty alien when starting out (voltages e.t.c.)

edit: Also to increase clocks, is it the cpu boost clock override in Bios? It is set to auto at the moment
 
The Asgard said:
Scores look ok. I was running Prime Large FFT at 1.0v but was also running an offset. See previous attachments.

LLC should help with stability at idle. Have a play and monitor your voltage with Hwinfo
Click to expand...

Ignore above post. Thanks Asgard, but I'm happy just with co after playing with above, -30 on two best, -25 on next two best and -20 all others seems really stable and prime isn't going to be something I put the CPU through realistically anyways.
 
Hi there,
Your average voltage does seem high. My current readings after 4.5 hrs are

( Gold )
Volts
Min 0.0063
Max 1.356
Average 1.056

Clock
Min 2880.1
Max 5150
Average 3957

I have everything on default and have just overridden the settings detailed in this post. Its a X570 on the Beta V1.63 BIOS (7C84v163)
 
The Artfull Bodger said:
Ignore above post. Thanks Asgard, but I'm happy just with co after playing with above, -30 on two best, -25 on next two best and -20 all others seems really stable and prime isn't going to be something I put the CPU through realistically anyways.
Click to expand...

That's a good reduction from stock and will allow the chip to stretch its legs. Have you tried a boost override?
 
Is there a way to undervolt easily without the curve optimizer in bios? Doesn't look like my msi mpg x570 gaming plus has it.

Cheers.
 
MarkA said:
Is there a way to undervolt easily without the curve optimizer in bios? Doesn't look like my msi mpg x570 gaming plus has it.
Click to expand...
Keep looking
Curve Optimizer is in PBO settings somewhere.

Because there is a way to undervolt more easily, and it also requires access to PBO section in bios.
I'm talking about reducing power limits.
 
Yeah, finally got it. I must be blind!
Weirdly, with some adjustments CO -5, PPT 110.. seems my idle temps haven't moved a degree.
Same goes with CO -10/-20/-30. Although I do start crashing at -30.

Any thoughts on getting cooler?
 
Disable PBO limits. This defaults power settings based on chip defaults. You should loose 10 ‘c which translates into loosing about 1K from R23 in my testing.
 
MarkA said:
idle temps
Click to expand...
Nothing of this will help idle.
Need to reduce background apps (or if you want to go extreme set power plan in windows to powersave). To stop the CPU boosting on any hint of background activity
 
Correct. It won’t reduce idle at all but on my system it reduces load temps by around 10’c. Which makes it significantly quieter when gaming or using heavy apps. Idle temps are irrelevant if there less than 40’c. The weather brought mine up to around 38’c which is fine.

Just to add my average idle power at the socket for the system is around 80 watts. Which is pretty impressive given the GPU, fans, pump, lights 5 SSD’s, 2 HD and OCTO.
 
Last edited:
Not sure where to start so just did PBO Limits disabled, CO all core -25 , +100mhz boost cinebench r20 restarted starting single run +75mhz it went through

cinebench r20 multi all cores are running beteen 4.425- 4.450 , single run get boosts to 5025mhz temps dont go past 60c on either done some game benchmarks WWZ and Shadow of the Tomb Raider clocks stayed mainly 4800-5025 temps around 50c not sure where to go from here
 
Ultimately with PBO limits disabled your running the power limits set in the chip which is lower. You do loose a little performance but you are sort of throttling the chip potential to get lower temps. R23 loose about 1K with a score of 22K It’s a good compromise. The chip is really clever in the way it try’s to get the maximum out from a given power envelope, very clever!
 
The Asgard said:
Ultimately with PBO limits disabled your running the power limits set in the chip which is lower. You do loose a little performance but you are sort of throttling the chip potential to get lower temps. R23 loose about 1K with a score of 22K It’s a good compromise. The chip is really clever in the way it try’s to get the maximum out from a given power envelope, very clever!
Click to expand...

I'll just have to play around and test seems time consuming but planning not upgrading anytime soon so at some point will be set and forget about it ;) just have to find out if its stable which will take some time currently getting on cinebench r20 multi 86k and 640 single which I dont think is to shabby with temps not exceeding 60c
 
humbug said:
Pentium III
Skt 478 Pentium IV 3.2Ghz HT (Good Grief... switched to AMD)

Athlon 3800+ (oh wow.....)
Athlon X2 5200+
Phenom II X6 1090T (one of my favourites)
FX 9590 (Embarrassed to admit it, switched back to Intel)

Core i7 930 (loved that chip, regretted selling it on)
Core i5 4690K (Was quite happy with that for a couple of years but it started to come over all 4 core, switched back to AMD again)

Ryzen 1600
Ryzen 3600
Ryzen 5800X (blows my mind, still)
Click to expand...

First time ive been back to AMD in a few years .

Athlon 64 4000
Athlon 64 4400
Phenom x4 960t - still running with HD6950 - Beast of a chip but runs damn hot.

i5 2500k
i5 4670k - still running with HD7870
i5 6600k - still running with HD7950

Ryzen 5600x - technological marvel !


Undervolting seems like its going to be fun, playing around with curve optimizer. I don't think I've this much of an itch to play with a chip since the 960t - the gen we could unlock free cores, now that's what you call a silicone lottery :D.
 
I have been struggling with this like made.

My 5900X had my 2 best cores running on -20, everything else on -15.
200Mhz boost,
and Limits - motherboard.

I am almost at my wits end on getting this stable at low loads.
I also don't know enough about getting everything else set right as i'm not even sure what it is!

MSI x570 Tomohawk, Anyone have any advice

I have tried removing the boost but as soon as I use CO, I get the WHEA error almost without failure on low loads.
 
You must log in or register to reply here.
Back
Top Bottom