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Limit 5800x clocks

Wing-Man said:
in bios....
AMD Overclocking > PBO Setting > Max CPU boosh clock override (set enable plus or minus) > adjust in 50mhz steps

So if you set Enable Negative / 200, it should be 200mhz below the MAX pbo will try to boost. it dose and doesn't work lol
my cpu boosts to 4.85Ghz if i set negative 200 when it not under load i still see spikes to 4.85 but then you load up the chip with games or cinebench the max clock is 4.65
Click to expand...
Thanks Will look later
Not that a 5950x is slow lol
But there's definitely room to improve my all core boost
Especially given the motherboard is a beast so should overclock well
 
Mcnumpty2323 said:
Any idea what the setting is called?
Somewhere around 4400mhz all core would do me
And 5ghz on single core as my board has asus dynamic overclocking switching
Click to expand...
I believe the setting in question on Asus is called Max CPU Boost Clock override.
In your example it would affect the max clock reached in single/low threads. Which for stock 5950X is 5050MHz I believe. Honestly, for 5950X it is not useful.
It won't limit the all core clocks in any way.

Normally PBO by itself would only increase power limits. This allows CPU to clock higher in heavy loads, the all core 4650 you mention. But if it is unstable, means it is not getting enough voltage and mid-range clocks, means its not using the voltage curve?
Now we are getting into muddy waters as you are mixing the dynamic overclock switching and PBO. I would rather stay away from that dynamic crap and try as simple solution as possible.

1. PBO advanced, increase power limits if you want more all-core boost.
2. Tweak per core Curve Optimizer so that it has boosting headroom (affects both single and multicore)
3. ??? (test stability)
4. Profit
 
alec said:
I believe the setting in question on Asus is called Max CPU Boost Clock override.
In your example it would affect the max clock reached in single/low threads. Which for stock 5950X is 5050MHz I believe. Honestly, for 5950X it is not useful.
It won't limit the all core clocks in any way.

Normally PBO by itself would only increase power limits. This allows CPU to clock higher in heavy loads, the all core 4650 you mention. But if it is unstable, means it is not getting enough voltage and mid-range clocks, means its not using the voltage curve?
Now we are getting into muddy waters as you are mixing the dynamic overclock switching and PBO. I would rather stay away from that dynamic **** and try as simple solution as possible.

1. PBO advanced, increase power limits if you want more all-core boost.
2. Tweak per core Curve Optimizer so that it has boosting headroom (affects both single and multicore)
3. ??? (test stability)
4. Profit
Click to expand...
Thanks Will look at that too
Already tried curve optimiser
Seemed to work but would get random crashes when on light loads
Was fine under heavy load
Apparently others have had same issue
 
Mcnumpty2323 said:
That's interesting
On my previous 3900x
I just turned on pbo and let it do its thing
Didn't adjust anything and it worked fine

But yesterday on my new 5950x
Turned on pbo which just caused immediate crashing
Pretty sure I saw it boosting all cores to 4650mhz as it crashed
Which would be a very aggressive overclock

Any idea what the setting is called?
Somewhere around 4400mhz all core would do me
And 5ghz on single core as my board has asus dynamic overclocking switching
So you can overclock for both all core and single

Not overclocked in years but assumed just turning on pbo
Would just give a moderate overclock
Not aim for huge one
Even the 2 oc presets in bios caused immediate crashes
Didn't even try to boot into windows
Guess they also turned on pbo
But it's trying to add 650mhz to all cores :(

I can in ryzen master just set all core speed without pbo
But then it doesn't downclock under light loads
And doesn't boost single core load either
Click to expand...

Thats weird as I always thought PBO would only boost within certain limits, temp, voltage etc. Wing-Man already beat me to it but on my board the setting is called CPU Boost Clock Overide which you can set to either Positive or Negative and then select how much + or - you want below. I set my 5600x to +100mhz so it boosts to 4750mhz all core. I also have Curve Optimizer set per core and PBO limits such as PPT, TDC and EDC all set manually
 
Mcnumpty2323 said:
Seemed to work but would get random crashes when on light loads
Click to expand...
yeah, typical on Zen3, instability on light loads - on max boost clocks which are hit rarely.
need more stability testing with variable load in a tool which reports which core failed. CoreCycler or OCCT is good.

Once properly tested, it is the best of both worlds solution. High single core boost, all-core boost according to power limit, high efficiency
 
SpudMaster said:
Thats weird as I always thought PBO would only boost within certain limits, temp, voltage etc. Wing-Man already beat me to it but on my board the setting is called CPU Boost Clock Overide which you can set to either Positive or Negative and then select how much + or - you want below. I set my 5600x to +100mhz so it boosts to 4750mhz all core. I also have Curve Optimizer set per core and PBO limits such as PPT, TDC and EDC all set manu
Click to expand...
Yeah I didn't expect pbo to be so aggressive
There's also the asus auto overclock
Though didn't try that
Used it years ago on intel but didn't find it very reliable
Will have another look later
But this asus crosshair viii extreme bios has stuff I have never even heard of
No simple up cpu voltage and increase multiplier nowadays
 
Mcnumpty2323 said:
Yeah I didn't expect pbo to be so aggressive
There's also the asus auto overclock
Though didn't try that
Used it years ago on intel but didn't find it very reliable
Will have another look later
But this asus crosshair viii extreme bios has stuff I have never even heard of
No simple up cpu voltage and increase multiplier nowadays
Click to expand...
I always stay away from auto overclock features on boards as they always temp to overcompensate with voltage.
 
alec said:
yeah, typical on Zen3, instability on light loads - on max boost clocks which are hit rarely.
need more stability testing with variable load in a tool which reports which core failed. CoreCycler or OCCT is good.

Once properly tested, it is the best of both worlds solution. High single core boost, all-core boost according to power limit, high efficiency
Click to expand...
I've had two Zen3 CPUs, both hit max boost and I've not had a single problem with either (other Zen3 I gave to my mother and zero problems since moving to a different motherboard). Unless you're specifically talking about the 5950x?

I'm just confused as you said "typical", it's not something I usually see.
 
Mcnumpty2323 said:
There's also the asus auto overclock
Click to expand...
no if your going to manual then just do it your self. its a lot safter.

Mcnumpty2323 said:
Yeah I didn't expect pbo to be so aggressive
Click to expand...
is bios upto date? dose the board know what its boosting.

set everthing to auto and install ryzen master and use the curv optimiser, take about 40min to run and give you a good idea when can be done.
it will undervolt and find max stable clocks
 
Wing-Man said:
no if your going to manual then just do it your self. its a lot safter.


is bios upto date? dose the board know what its boosting.

set everthing to auto and install ryzen master and use the curv optimiser, take about 40min to run and give you a good idea when can be done.
it will undervolt and find max stable clocks
Click to expand...
Yeah it's on the latest bios 1101
Did curve optimiser previously in ryzen master
but under light loads it would randomly crash
2 or 3 times a day
 
Thanks guys
Making a bit of progress now
Turned pbo to manual
But what confused me before was there was only auto option for max frequency
Was expecting to see +50 +100 etc
Or -50 -100 etc
Like you said
But turned out I literally had to type in "minus" or "plus"
Never seen that before usually it's a drop down option for you
So can select whatever you want
First attempt minus 300 didn't alter power or voltage,ppt,edc etc
So far it's doing between 4300 and 4400mhz all core and 5050mhz single core
And only 52c in cinebench multi core
Before was 3900mhz all core and 5050mhz single
 
Mcnumpty2323 said:
Yeah it's on the latest bios 1101
Did curve optimiser previously in ryzen master
but under light loads it would randomly crash
2 or 3 times a day
Click to expand...

yer i had that too, its when its set a little too low on the best cores, so they try to boost super high and run out of power..
if it sets say -17 and core 1 / 5 are the fastest, then them to -7 so they get a little more power.

you can see the fastest cores in RM, then just set curve in bios
 
Mcnumpty2323 said:
Thanks guys
Making a bit of progress now
Turned pbo to manual
But what confused me before was there was only auto option for max frequency
Was expecting to see +50 +100 etc
Or -50 -100 etc
Like you said
But turned out I literally had to type in "minus" or "plus"
Never seen that before usually it's a drop down option for you
So can select whatever you want
First attempt minus 300 didn't alter power or voltage,ppt,edc etc
So far it's doing between 4300 and 4400mhz all core and 5050mhz single core
And only 52c in cinebench multi core
Before was 3900mhz all core and 5050mhz single
Click to expand...
Sorry should have said you need to type in the values. On my board you selece either 'Enabled (Positive) or Enabled (Negative)' then when you type in the max booster override it will be wither + or -.
As for PBO limits I would choose manual instead of motherboard. Im running PPT 150W, TDC 90A and EDC 150A with my 5600X. I wouldn't copy those with a 5950X but check what HW Monitor is reporting when you system is underload and go with something in that ballpark and then see how its affects the boost clocks.
 
just going to take another look at it
it seems there may be 2 x pbo sections in my bios
the one i was in didnt have options like enabled positive/negative
or pbo limits motherboard etc
seems a bit stupid but apparently in advanced section rather than oc tweaker is
where i should be looking
 
yeah was another pbo for ##### sake
in advanced/amd overclocking/pbo
that did have all the options you guys mentioned
had a play around with it
but for now i just set it to auto
thats boosting it from original 3900mhz all core
to 4400mhz all core though lost 100mhz on single core to 4950mhz
only thing is temperatures have jumped to 75c on all core loaded

this board can probably push it to 4500 or 4600mhz all core
and i didnt get to curve optimiser yet
so can probably drop temps a bit with that
but had enough for one day
very time consuming and this asus doesnt have reboot to bios
that was quite useful on previous board

thanks for all the pointers guys :)
 
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