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5700x undervolting made no difference? Help?

Removed User 345456

Removed User 345456

Removed User 345456

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10 Nov 2005
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So basically when I built the rig I tried both methods of undervolting by adjusting the mv and then trying the PBO2 undervolt method... And it literally made ZERO difference in power consumption/temps and ran the same at the wall monitoring it with a plug metre and the same in hwinfo (or whatever it's called)... Nor did the actual core voltage run less than stock whilst monitoring it
:wallbash:


The only difference is when I did the PBO2 method I was able to boost at a higher than stock ghz and obviously then my power draw was even more than stock...

What am I doing wrong? Or am I just unlucky?

For reference I used this method first:

And when that did nothing I tried this the PBO2 method:
 
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Cyber-Mav said:
Normal, freeing up more power just gets consumed again in higher boost so you get more performance for same wattage
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That's my point it didn't give me anymore power or use any less.

The only time it made a difference was ironically pbo2 when it decided to use like 92-112w vs the usual 59-65w and was boosting at 4.9ghz vs 4.6... But I wasn't after an overclock.

I just want it to use less power.

All the videos I see they do the same stress test or game and are suddenly using less power?
So why isn't that the case when I do it?
 
From what I know, when you start to apply negative PBO it allows the CPU to clock higher. This means temps end up staying the same, or potentially being higher. You said yourself it boosted higher, so that fits with that.
The more you add negative PBO, you eventually get to a point where it won't boost any higher then further PBO reductions end up reducing power usage, temps then start to go down.

So you just need to do more negative PBO to get past the part where it boosts higher, or use another method for reducing power.
 
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Nutty667 said:
From what I know, when you start to apply negative PBO it allows the CPU to clock higher. This means temps end up staying the same, or potentially being higher. You said yourself it boosted higher, so that fits with that.
The more you add negative PBO, you eventually get to a point where it won't boost any higher then further PBO reductions end up reducing power usage, temps then start to go down.

So you just need to do more negative PBO to get past the part where it boosts higher, or use another method for reducing power.
Click to expand...
Yeah see I understood that method and why, but it's the fact that when I did it the first method's way which doesn't touch pbo etc it literally made no difference in temp/voltage/vcore/performance. All it did was give a slightly lower cinebench score lol.
As I mentioned I tried 2 different methods. So surely 1 should have done what I'd wanted and the other is pbo and did what pbo does with lower mv's.
 
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You'll get better results with an all core overclock/undervolt.
I used to run my 5800x at 4.65ghz all core at 1.325 and it was a fair bit cooler than stock trying to boost it's nuts off
 
Dreadi said:
You'll get better results with an all core overclock/undervolt.
I used to run my 5800x at 4.65ghz all core at 1.325 and it was a fair bit cooler than stock trying to boost it's nuts off
Click to expand...
All I'm after is just for it to consume less power mate. No overclock gains just run as low power draw as possible at stock ghz/boost and then paired with undervolting a new gpu that'd give me very good bang per buck power consumption on both parts.
 
keef247 said:
All I'm after is just for it to consume less power mate. No overclock gains just run as low power draw as possible at stock ghz/boost
Click to expand...
Perfectly achievable, but you need to limit your CPU boost clocks and/or power budget in combination with PBO2 curve optimizer.

If goal was keep stock clocks and lower power.
1. Run some load at stock, record what clock cpu boosts to normally (clock X)
2. Limit boost to clockX via negative PBO2 boost clock override
3. Tune per core curve optimizer
4. optionally pair it with lower power limit
5. Profit

this results in that PBO2 won't use power budget freed by undervolting to boost even higher. Also curve optimizer can be tuned more agressively if it is not required to hit high clocks.
 
If you dont have the power supply to run a 65w cpu and dont have cooling capacity for a 65w cpu all running at stock then YOU are the problem and not the computer.
Thats a very easy cpu to run even at stock it doesnt need any undervolting or fiddling with to get great performance.
Whats your full spec? What cooler you running and what temps you getting? Is it throttling? What do you want to achieve from your setup?
 
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Cyber-Mav said:
If you dont have the power supply to run a 65w cpu and dont have cooling capacity for a 65w cpu all running at stock then YOU are the problem and not the computer.
Thats a very easy cpu to run even at stock it doesnt need any undervolting or fiddling with to get great performance.
Whats your full spec? What cooler you running and what temps you getting? Is it throttling? What do you want to achieve from your setup?
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I think you've completely missed the point, I just want to run the cpu as low wattage as possible paired with undervolting my gpu so my pc doesn't eat electric at the disgusting inflated per kw/hr we're paying - I'm happy with the 65w'ish it uses but it's annoying me I can't make it lower like everyone else does with an undervolt - as WHY wouldn't I want to when it can do it, it's literally free savings on electric? It's not like I'm asking to achieve a mad overclock.

I have a 850w NZXT psu, 5700x with a thermalright peerless assassin 120se dual 120mm big boy hsf, msi mortar b550 matx max wifi 6e, 32gb corsair 3600mhz cas 16, 2tb mp600 pro with heatsink, 2x 140mm fronts 1x120mm rear case wise.
 
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Cyber-Mav said:
in that case dont worry about undervolt, just change the ppt power limit to anything you want like 35w even.
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Someone else told me stupid windows power management can over-ride what's set in the bios - seems very counter intuative to me considering the bios SHOULD govern what software/os behaves with surely? I've been using linux/macs for last 15 years and this really annoys me tbh. Am I better off if not just using amd adrenaline or again will windows mess with what I've set?
 
As mentioned above. Enable PBO. Set the power limits to be manual rather than auto, and change PPT to a lower value. I have my 3950X set at 88 watts, but 65W would work as well.

That will still let it boost etc on single core spikes etc, but limit the overall package power to keep power use and temps down. Made a nice difference for me.

I also have a slight negative voltage offset. I dont bother with PBO curves or anything like that. I just wanted reduced power use like you.
 
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Donnie Fisher said:
As mentioned above. Enable PBO. Set the power limits to be manual rather than auto, and change PPT to a lower value. I have my 3950X set at 88 watts, but 65W would work as well.

That will still let it boost etc on single core spikes etc, but limit the overall package power to keep power use and temps down. Made a nice difference for me.

I also have a slight negative voltage offset. I dont bother with PBO curves or anything like that. I just wanted reduced power use like you.
Click to expand...
Thanks mate, nice and simple to the point :)
 
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