I wanna try PBO on my 5700X3D but...

[foxbill86]

I wanna try PBO on my 5700X3D but X3D Chips are known to be not "Unlocked" because X3D chips cannot work on high voltage right? that is why its not overclockable and I know PBO is not like overclocking but feeding more power to the chip, but isn't that the same thing? will it damage my chip? or is it okay?
 

[RONOTHAN##]

9 minutes ago, foxbill86 said:

I know PBO is not like overclocking but feeding more power to the chip, but isn't that the same thing?

There's a difference between higher power limits and higher voltage. The power a chip draws is voltage times current, and current is proportional to clock speed in a given workload. Increasing the power limit will allow the clock speeds to go higher, even if the voltage doesn't increase any higher. 

 

11 minutes ago, foxbill86 said:

will it damage my chip?

No. 

[TheDankKoosh]

18 minutes ago, foxbill86 said:

I wanna try PBO on my 5700X3D but X3D Chips are known to be not "Unlocked" because X3D chips cannot work on high voltage right? that is why its not overclockable and I know PBO is not like overclocking but feeding more power to the chip, but isn't that the same thing? will it damage my chip? or is it okay?
 

The only changes available to AM4 X3D chips are curve optimizer (via PBO2 tuner) and BCLK changes, you cannot raise max load voltage beyond ~1.2v as it's fused at the factory to do so, mostly to protect the 3D cache. Most you're likely to get without a clockgen is 102 BCLK AKA +84mhz to core clocks, best you should reasonably do with your system is to just undervolt via PBO2 tuner to ensure max clocks are getting reached in game, definitely give the ram a tune for less stutter in games.

[RONOTHAN##]

1 minute ago, TheDankKoosh said:

you cannot raise max load voltage beyond ~1.2v as it's fused at the factory to do so

Not true, changing the voltage is completely up to the motherboard and therefore you can set 1.4V+ if you want on those chips. It's just that since the multiplier is locked and BCLK overclocking the X3D chips kinda sucks, there's no reason to actually touch the VCore setting outside of very niche scenarios. The default voltage will never go above 1.2V though. 

[foxbill86]

This is my 1st time in undervolting or overclocking ever in my life (with my 5700x3d). Is this a good tutorial? Link: 

 I am really scared but many people said that I should undervolt it

[WereCat]

Just use Curve Optimizer. These CPUs are both power limited amd multiplier locked so there is no point trying to use PBO.

 

You can get around power limit with skewing the CPU current Telemetry readings if you have option for that in the BIOS but that will not really help for gaming as you will never run into power limit when playing games.

 

[WereCat]

1 hour ago, RONOTHAN## said:

There's a difference between higher power limits and higher voltage. The power a chip draws is voltage times current, and current is proportional to clock speed in a given workload. Increasing the power limit will allow the clock speeds to go higher, even if the voltage doesn't increase any higher. 

 

Yes but also the clocks are temperature sensitive so more power = more heat and in case of X3D you're most likely to run into higher heat load and thus get clock regression or clock stretching so it's not worth it unless you have really good cooling.

 

And also it will do nothing for gaming as these chips sip power when playing games. It's in loads like Linpack Xtreme or OCCT where this will make the difference. Heck even Cinebench isn't that heavy for it to matter too much though it may affect the scores with weaker cooler.

[WereCat]

1 hour ago, foxbill86 said:

This is my 1st time in undervolting or overclocking ever in my life (with my 5700x3d). Is this a good tutorial? Link: 

 I am really scared but many people said that I should undervolt it

That is a very old video. You most likely have Curve Optimizer settings in the BIOS now. Just set a negative offset of anything between 0 to 30 and make sure to test for stability.

30 will be the best if you can actually run it. I had to settle for 25 with LLC lvl 3 on my ASUS motherboard as default LLC was causing voltage droops and preventing me from going above CO 20.