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*** AMD "Zen 4" thread (inc AM5/APU discussion) ***

running the memory at 6400mhz from xmp sets the soc voltage and VDDIO at 1.4v , do i lower it or leave it on auto (msi b650 tomahawk board)
running the memory at 6000mhz from xmp sets the soc voltage and VDDIO at 1.350v

so far these gave errors at 6400mhz
soc 1.300 vddio 1.400 crash aida
soc 1.250 vddio 1.400 crash os
soc 1.300 vddio 1.350 crash aida
soc 1.350 vddio 1.350 crash aida
soc 1.350 vddio 1.400 crash aida (maybe fclk too high at 2133mhz)
soc 1.400 vddio 1.400 testing ...

image for reference (fclk can go to 2133mhz) post some results from a 7600x cpu
i still havent tuned the timings

2100-6400-xmp-uclk-mclk-jpg.2597832
 
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So...
How does one go about doing the whole undervolting and PBO thing?
Or is it better to just manually overclock (and how do you do that)?
I guess maybe set up a motherboard profile for each?

FYI, I've got a 7700 and Asus TUF Gaming B650-Plus (with 5600MHz TeamGroup RAM), in case any of that makes a difference?
 
mite_jan said:
running the memory at 6400mhz from xmp sets the soc voltage and VDDIO at 1.4v , do i lower it or leave it on auto (msi b650 tomahawk board)
running the memory at 6000mhz from xmp sets the soc voltage and VDDIO at 1.350v

so far these gave errors at 6400mhz
soc 1.300 vddio 1.400 crash aida
soc 1.250 vddio 1.400 crash os
soc 1.300 vddio 1.350 crash aida
soc 1.350 vddio 1.350 crash aida
soc 1.350 vddio 1.400 crash aida (maybe fclk too high at 2133mhz)
soc 1.400 vddio 1.400 testing ...

image for reference (fclk can go to 2133mhz) post some results from a 7600x cpu
i still havent tuned the timings

2100-6400-xmp-uclk-mclk-jpg.2597832
Click to expand...


what memory do you have ?
 
From having a fair amount of mem tuning experience, I'd strongly advice against using AIDA as any of type of a stability test. Passing AIDA does not mean you'll be stable in strenous workloads and games. It's like "passing" cinebench. It's borderline useless.

If you're just running XMP, my basic recommendation would be Karhu: https://www.karhusoftware.com/ramtest/

If you're going a step further and tuning timings, I'd still use Karhu but add Ycruncher to the list:
Y-Cruncher: http://www.numberworld.org/y-cruncher/ It's command line based and free. For 16gb, run options 0,1,7 and for 32gb 0,1,8.

Finally, I'd complete any mem/fclk/core tuning with OCCT Large/AVX2: https://www.ocbase.com/ This is the default option when you start the program. You want to pass 30mins for quick changes and 1hr for a something stable.

If any of these error, you're not stable. Simple as that.
 
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ShiWarrior said:
what memory do you have ?
Click to expand...
Kingston fury renegade i think it was 6400mhz @32 timings 1.40v no expo profiles just intel xmp
Robert896r1 said:
From having a fair amount of mem tuning experience, I'd strongly advice against using AIDA as any of type of a stability test. Passing AIDA does not mean you'll be stable in strenous workloads and games. It's like "passing" cinebench. It's borderline useless.

If you're just running XMP, my basic recommendation would be Karhu: https://www.karhusoftware.com/ramtest/

If you're going a step further and tuning timings, I'd still use Karhu but add Ycruncher to the list:
Y-Cruncher: http://www.numberworld.org/y-cruncher/ It's command line based and free. For 16gb, run options 0,1,7 and for 32gb 0,1,8.

Finally, I'd complete any mem/fclk/core tuning with OCCT Large/AVX2: https://www.ocbase.com/ This is the default option when you start the program. You want to pass 30mins for quick changes and 1hr for a something stable.

If any of these error, you're not stable. Simple as that.
Click to expand...
I am aware that aida64 on its own is not enough , i am just doing initial testing with it , occt i know , the other 2 i was not aware of , is it normal to have soc voltage so high 1.4v , what would you recommend for finding which core crashes when trying to find per core curve optimiser, there was some utility core cycler if i remember and from windows events should be able to find which core crashes right
 
set your bios to default, TNEN go to advanced and change it manually

forget enabling XMP on the main screen

XMP Profile #1: DDR5-6400 CL32-39-39 @1.4V
 
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mite_jan said:
Kingston fury renegade i think it was 6400mhz @32 timings 1.40v no expo profiles just intel xmp

I am aware that aida64 on its own is not enough , i am just doing initial testing with it , occt i know , the other 2 i was not aware of , is it normal to have soc voltage so high 1.4v , what would you recommend for finding which core crashes when trying to find per core curve optimiser, there was some utility core cycler if i remember and from windows events should be able to find which core crashes right
Click to expand...

1.4v soc is fine. It's not like zen3.

You can use Corecycler or set occt like this:
image.png
 
ShiWarrior said:
set your bios to default, TNEN go to advanced and change it manually

forget enabling XMP on the main screen

XMP Profile #1: DDR5-6400 CL32-39-39 @1.4V
Click to expand...
xmp loads fine but yes i can use some of the msi presets (msi memory try it) or set manually
i couldnt find option for gear down mode to disable it , zen timings reports that it is enabled as you can see from my photo , there is option for power down mode but that should be different
setting to 2T command rate should disable gear down mode ? better to run 2t than 1t with gear down mode ?
 
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Robert896r1 said:
1.4v soc is fine. It's not like zen3.

You can use Corecycler or set occt like this:
image.png
Click to expand...
everything seems to be crashing until i use 1.4v soc and 1.4v CPU VDDIO
nice thing about this 7600x is that i can use curve optimizer -30 negative on all cores (still needs testing to confirm )
cpu voltage drops significant from 90C+ to 78C in cinebench (with brocken cpu bracket , i am waiting on a new one to do some proper testing)
 
Last edited:
GoogalyMoogaly said:
So...
How does one go about doing the whole undervolting and PBO thing?
Or is it better to just manually overclock (and how do you do that)?
I guess maybe set up a motherboard profile for each?

FYI, I've got a 7700 and Asus TUF Gaming B650-Plus (with 5600MHz TeamGroup RAM), in case any of that makes a difference?
Click to expand...

I don't know much about it. I have a 7600x and I gained a lot just by turning on PBO in the bios and sticking it to aggressive settings. I think this guy walks us through the AMD undervolting thing though.

www.youtube.com

Fixing Ryzen 7000 - PBO2 Tune (insanity)

Check prices on Amazon belowAMD Ryzen 7950X: https://geni.us/POdZzAMD Ryzen 7700X: https://geni.us/wVA29rcAMD Ryzen 5800X3D: https://geni.us/WfQS9s2RTX 3070:...
www.youtube.com www.youtube.com
 
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kute said:
I don't know much about it. I have a 7600x and I gained a lot just by turning on PBO in the bios and sticking it to aggressive settings. I think this guy walks us through the AMD undervolting thing though.

www.youtube.com

Fixing Ryzen 7000 - PBO2 Tune (insanity)

Check prices on Amazon belowAMD Ryzen 7950X: https://geni.us/POdZzAMD Ryzen 7700X: https://geni.us/wVA29rcAMD Ryzen 5800X3D: https://geni.us/WfQS9s2RTX 3070:...
www.youtube.com www.youtube.com
Click to expand...
how high does the clocks go single core and multicore in cinebench
 
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