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Intel 13th gen undervolt stability

dazzlaa

dazzlaa

dazzlaa

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Recently upgraded to a 13600k system and I’ll just start by saying how amazing the CPU is. No complaints at all.
However, the new architecture is different when it comes to overclocking and tuning with the P and E cores. I’ve spent time trying to understand the various settings and had a very stable 5.5 P core value with a negative voltage offset of -0.05. Incredible to say this would sit smashing Cinebench multi core tests at this frequency and only pulling 130 watts!
The problems start with gaming though, when gaming, this is not stable. My PC won’t crash or lock up but games freeze and quit to desktop, something I’m not really used to with CPU tuning and historically I’d expect more BSOD.
Anyone had similar experiences or would like to share some knowledge?

I’m also using a Strix motherboard if anyone has any particular settings for ASUS bios.

Merry Christmas! (Back on default settings for now with manual memory timings and negative offset voltage and stable)
 
I lack a lot knowledge in this area and I followed a few youtube guide's so someone will be better to inform but with my 12600k and my MSI z690 a-pro I run the following:

CPU Core voltage mode: Adaptive and offset
CPU Core voltage offset mode: - (minus)
CPU Core voltage offset 0.080

This has taken my stock 12600K down from 125w to around 95-100w with around 100-150 points off the score in Cinebench and all core loads seem to be the same and this is stable without any problems.

Do you have an adaptive and offset setting in your bios as running just a offset maybe causing the instability with certain cpu loads?

Edit: I see you seem to be also running an overclock and my setting where stock so this may also be an issue.
 
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I have a 13900k but didn’t bother with the per core adaptive voltage etc. whichever way you do it Cinebench is your problem in my opinion. It’s good to get a baseline and to track performance increase, but not a good stability test. I would recommend running Realbench at least then when stable play games and adjust voltage if needed. Are you checking HWInfo for whea errors when this happens in games?
 
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Thanks guys, without being at my computer and checking factually I believe I was set to offset mode and not adaptive.

Haven’t tried realbench either so that is something else I’ll include next time.

The 5.5Ghz overclock was something the ASUS Ai software set and in all honesty I was just blown away that it seemed to be somewhat stable at that frequency!

More investigation required but will def check that the ‘adaptive’ setting is applied :D
 
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from some video I watched I cant remember which the adaptive and offset, not just the adaptive or just the offset setting can adapt the voltage that can help maintain stability and stop crashing which may occur using just an offset setting.
 
dazzlaa said:
Thanks guys, without being at my computer and checking factually I believe I was set to offset mode and not adaptive.

Haven’t tried realbench either so that is something else I’ll include next time.

The 5.5Ghz overclock was something the ASUS Ai software set and in all honesty I was just blown away that it seemed to be somewhat stable at that frequency!

More investigation required but will def check that the ‘adaptive’ setting is applied :D
Click to expand...
Being able to get 5.5 is great and all but dropping it down to even 5.2 would get you much better temps, and you won’t notice the difference performance wise.

It took me a few days of testing to get my 13900k where I wanted it to be temp wise, and 5.5 was what I settled on because I wasn’t happy with temps pushing any higher, even though it was all well within limits etc. 6GHz sounds impressive but I’d much prefer better temps at 5.5.

Good luck.
 
Harshell123 said:
Being able to get 5.5 is great and all but dropping it down to even 5.2 would get you much better temps, and you won’t notice the difference performance wise.

It took me a few days of testing to get my 13900k where I wanted it to be temp wise, and 5.5 was what I settled on because I wasn’t happy with temps pushing any higher, even though it was all well within limits etc. 6GHz sounds impressive but I’d much prefer better temps at 5.5.

Good luck.
Click to expand...

Thanks! To be honest, the temps were superb when combined with the offset. I’m on a custom loop and the cpu was never exceeding 70c, obviously unstable though. Part of me is thinking it could be stable but I’m missing something with my unfamiliarity with the architecture. Obviously this is being very optimistic!
 
I had similar results undervolting my 13900k, games would crash.
Turns out it was my ram crashing games, not undervolting my CPU

My ram doesn't like it's XMP profile in this setup so I needed to drop the speed from 3600 to 3200.
It wouldn't even run at 3600 with some extra voltage.

Once I did this I've had no stability problems even with my -0.08v CPU offset
 
The best way to undervolt the 13th gen on an Asus MB is based on the guide I've used below.
The basic gist is to Set Disable MCE, Set LLC4 DC_LL 1.02 and AC_LL 0.2, run CBR23 and continue to drop AC_LL 0.19 , 0.18 etc until your PC is no longer stable.

Guide here:

www.overclock.net

Asus Maximus Z790 and Intel i9-13900k/14900k - An...

www.overclock.net www.overclock.net

At stock I ended up with AC_LL 0.03 which reduced my full load voltage from 1.28V to 1.138V which reduced temps by 20C. You can then use adaptive voltage for low load voltages.
 
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OC2000 said:
The best way to undervolt the 13th gen on an Asus MB is based on the guide I've used below.
The basic gist is to Set Disable MCE, Set LLC4 DC_LL 1.02 and AC_LL 0.2, run CBR23 and continue to drop AC_LL 0.19 , 0.18 etc until your PC is no longer stable.

Guide here:

www.overclock.net

Asus Maximus Z790 and Intel i9-13900k/14900k - An...

www.overclock.net www.overclock.net

At stock I ended up with AC_LL 0.03 which reduced my full load voltage from 1.28V to 1.138V which reduced temps by 20C. You can then use adaptive voltage for low load voltages.
Click to expand...

Awesome, thanks for sharing. Got a relatively lazy day tomorrow so I’ll be trying to get the system dialled in and stable.
 
dazzlaa said:
Recently upgraded to a 13600k system and I’ll just start by saying how amazing the CPU is. No complaints at all.
However, the new architecture is different when it comes to overclocking and tuning with the P and E cores. I’ve spent time trying to understand the various settings and had a very stable 5.5 P core value with a negative voltage offset of -0.05. Incredible to say this would sit smashing Cinebench multi core tests at this frequency and only pulling 130 watts!
The problems start with gaming though, when gaming, this is not stable. My PC won’t crash or lock up but games freeze and quit to desktop, something I’m not really used to with CPU tuning and historically I’d expect more BSOD.
Anyone had similar experiences or would like to share some knowledge?

I’m also using a Strix motherboard if anyone has any particular settings for ASUS bios.

Merry Christmas! (Back on default settings for now with manual memory timings and negative offset voltage and stable)
Click to expand...
Usually if you crash instead of bsod, it means your voltage is really close to stability. So bump it a bit and see what happens
 
OC2000 said:
The best way to undervolt the 13th gen on an Asus MB is based on the guide I've used below.
The basic gist is to Set Disable MCE, Set LLC4 DC_LL 1.02 and AC_LL 0.2, run CBR23 and continue to drop AC_LL 0.19 , 0.18 etc until your PC is no longer stable.

Guide here:

www.overclock.net

Asus Maximus Z790 and Intel i9-13900k/14900k - An...

www.overclock.net www.overclock.net

At stock I ended up with AC_LL 0.03 which reduced my full load voltage from 1.28V to 1.138V which reduced temps by 20C. You can then use adaptive voltage for low load voltages.
Click to expand...

Found a decent set up using that guide. AC LL 0.17, DCLL 0.2, LLC 4, offset -0.04 all core synced at 5.3.

Very happy with temps, power and performance right now so thanks again for sharing :)
 
1P Core Boost - 5700MHz - Vcore-1.25v
All P Cores no AVX Boost - 5200MHz - Vcore-1.15v
All P Cores AVX Boost - 5100MHz - Vcore-1.11v
E Cores - 4100Mhz
Ring - 4600Mhz

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CPU Lite Load and TVB Voltage Optimization settings are important
 
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