OFFICIAL 5900X and 5950X two chiplet Zen 3 CPUs Overclocking thread

kairi_zeroblade · Aug 24, 2021

cowboy44mag said:
Windows version 21H1 OS build 19043.1165. I don't really have a "favorite" version of Windows 10, I usually just keep it up to date. I know that sometimes Windows updates can cause system issues and even loss of performance however I started keeping it up to date for the security patches. So far I have been lucky and haven't had any issues with keeping Windows up to date.

Thanks..will have a look into that build..

boldenc · Aug 25, 2021

anyone noticed if the EDC is lower than 140 the boost will be higher?
I did some testing with EDC from 140 to 200 and basically all my scores/boost are same.
I tried EDC 125 - 130 and all single scores are higher and boost is also higher
I wonder if is motherboard issue or this behavior is normal ?

MikeS3000 · Aug 25, 2021

boldenc said:
anyone noticed if the EDC is lower than 140 the boost will be higher?
I did some testing with EDC from 140 to 200 and basically all my scores/boost are same.
I tried EDC 125 - 130 and all single scores are higher and boost is also higher
I wonder if is motherboard issue or this behavior is normal ?

Normal behavior. This has been talked about since near launch of Zen 3. You have to find the EDC sweet spot. I use 170 for my 5900x as this balanced single core and mutli-core. Low EDC will hurt multi-core.

Milkysunshine · Aug 25, 2021

boldenc said:
anyone noticed if the EDC is lower than 140 the boost will be higher?
I did some testing with EDC from 140 to 200 and basically all my scores/boost are same.
I tried EDC 125 - 130 and all single scores are higher and boost is also higher
I wonder if is motherboard issue or this behavior is normal ?

I just did some testing in r23 single. I set affinity to one thread on my best core and watched the core effective clock. At my usual 155 EDC, that core's effective clock averages 4842.5. Lowering to 125EDC raises it to 4866.1 effective clock average. Boost was 50mhz higher, but overall a difference of less than 24mhz avg doesn't make this a worthwhile tweak for everyday use. Too much is lost overall. YMMV of course.

Milkysunshine · Aug 25, 2021

Here you go. Different results at different EDC for me. PPT and TDC are set too high to be reached.
I wanted to re-run these anyway after finishing my curve optimizer tuning, so thanks for the motivation. Best EDC for my setup didn't change with changes to the PBO curve.

This bunch is with C23
Please note: Scores are for comparison to each other only. Tests were done with ryzen master & HWiNFO64 open, corsair icue, and armoury crate running my absolutely unnecessary LEDs. Having those all running is a 1200-1800 point loss.

EDC-MHZ - Temp (Tctl/Tdie) - Score (best of 3 runs, 1 minute between to allow cpu to cool.)
125 - 4330 - 74.0 - 26938
135 - 4370 - 78.9 - 27293
145 - 4401 - 82.9 - 27438
150 - 4414 - 84.9 - 27446
155 - 4418 - 87.0 - 27695 *This is where the CPU runs right up before throttling, it allows it to run a bit hotter than higher EDC.
160 - 4409 - 86.3 - 27669
165 - 4402 - 86.3 - 27391
No point in graphing higher, they just get progressively worse in all 3 categories.
2.8% difference from best to worst.

This Bunch with Prime95 Small AVX2 enabled
EDC-MHZ - Temp (Tctl/Tdie)
125 - 3686 - 65.2
135 - 3771 - 68.0
145 - 3855 - 71.5
150 - 3917 - 73.3
155 - 3955 - 74.5
160 - 3982 - 76.6
165 - 3976 - 77.2
8% difference from best to worst.

Multi core CPU-z bench
135 - 12735.4
145 - 12874.1
150 - 12880.5
155 - 12865.5
160 - 12859.5
165 - 12834.4
175 - 12808.9
1% difference from best to worst. (Essentially standard deviation/margin of error stuff here.)

Single core CPU-Z bench (set to single thread to not heat soak the cpu during multi thread test. ...Sorry, I wasn't sitting through 7 single core R23s at this point.)
115 - 659.3
125 - 658.3
135 - 656.6
145 - 656.9
155 - 655.5
165 - 654.3
175 - 653.1
<1% difference from best to worst... (Again, Standard deviation/margin of error range.)

As you can see, not worth losing multi-core for single core. I suggest you do your own testing though, so many factors determine optimal settings.

Thanh Nguyen · Aug 25, 2021

Need help for first time AMD user. I tried to oc ram and pc does not post at any setting I use. Flck 1800, ram 3600. Dram voltage 1.55v soc voltage is 1.25v.

KedarWolf · Aug 26, 2021

Milkysunshine said:
Here you go. Different results at different EDC for me. PPT and TDC are set too high to be reached.
I wanted to re-run these anyway after finishing my curve optimizer tuning, so thanks for the motivation. Best EDC for my setup didn't change with changes to the PBO curve.

This bunch is with C23
Please note: Scores are for comparison to each other only. Tests were done with ryzen master & HWiNFO64 open, corsair icue, and armoury crate running my absolutely unnecessary LEDs. Having those all running is a 1200-1800 point loss.

EDC-MHZ - Temp (Tctl/Tdie) - Score (best of 3 runs, 1 minute between to allow cpu to cool.)
125 - 4330 - 74.0 - 26938
135 - 4370 - 78.9 - 27293
145 - 4401 - 82.9 - 27438
150 - 4414 - 84.9 - 27446
155 - 4418 - 87.0 - 27695 *This is where the CPU runs right up before throttling, it allows it to run a bit hotter than higher EDC.
160 - 4409 - 86.3 - 27669
165 - 4402 - 86.3 - 27391
No point in graphing higher, they just get progressively worse in all 3 categories.
2.8% difference from best to worst.

This Bunch with Prime95 Small AVX2 enabled
EDC-MHZ - Temp (Tctl/Tdie)
125 - 3686 - 65.2
135 - 3771 - 68.0
145 - 3855 - 71.5
150 - 3917 - 73.3
155 - 3955 - 74.5
160 - 3982 - 76.6
165 - 3976 - 77.2
8% difference from best to worst.

Multi core CPU-z bench
135 - 12735.4
145 - 12874.1
150 - 12880.5
155 - 12865.5
160 - 12859.5
165 - 12834.4
175 - 12808.9
1% difference from best to worst. (Essentially standard deviation/margin of error stuff here.)

Single core CPU-Z bench (set to single thread to not heat soak the cpu during multi thread test. ...Sorry, I wasn't sitting through 7 single core R23s at this point.)
115 - 659.3
125 - 658.3
135 - 656.6
145 - 656.9
155 - 655.5
165 - 654.3
175 - 653.1
<1% difference from best to worst... (Again, Standard deviation/margin of error range.)

As you can see, not worth losing multi-core for single core. I suggest you do your own testing though, so many factors determine optimal settings.

Here is what I used, optimized for multicore, but I have a really decent chip for Curve Optimizer, and it's Core Cycler stable as well.

KedarWolf · Aug 26, 2021

KedarWolf said:
Here is what I used, optimized for multicore, but I have a really decent chip for Curve Optimizer, and it's Core Cycler stable as well.

View attachment 2522381

View attachment 2522382

View attachment 2522383

View attachment 2522384

View attachment 2522385

View attachment 2522386

EDC at 155 is better for single-core though.

dansi · Aug 26, 2021

Milkysunshine said:
Here you go. Different results at different EDC for me. PPT and TDC are set too high to be reached.
I wanted to re-run these anyway after finishing my curve optimizer tuning, so thanks for the motivation. Best EDC for my setup didn't change with changes to the PBO curve.

This bunch is with C23
Please note: Scores are for comparison to each other only. Tests were done with ryzen master & HWiNFO64 open, corsair icue, and armoury crate running my absolutely unnecessary LEDs. Having those all running is a 1200-1800 point loss.

EDC-MHZ - Temp (Tctl/Tdie) - Score (best of 3 runs, 1 minute between to allow cpu to cool.)
125 - 4330 - 74.0 - 26938
135 - 4370 - 78.9 - 27293
145 - 4401 - 82.9 - 27438
150 - 4414 - 84.9 - 27446
155 - 4418 - 87.0 - 27695 *This is where the CPU runs right up before throttling, it allows it to run a bit hotter than higher EDC.
160 - 4409 - 86.3 - 27669
165 - 4402 - 86.3 - 27391
No point in graphing higher, they just get progressively worse in all 3 categories.
2.8% difference from best to worst.

This Bunch with Prime95 Small AVX2 enabled
EDC-MHZ - Temp (Tctl/Tdie)
125 - 3686 - 65.2
135 - 3771 - 68.0
145 - 3855 - 71.5
150 - 3917 - 73.3
155 - 3955 - 74.5
160 - 3982 - 76.6
165 - 3976 - 77.2
8% difference from best to worst.

Multi core CPU-z bench
135 - 12735.4
145 - 12874.1
150 - 12880.5
155 - 12865.5
160 - 12859.5
165 - 12834.4
175 - 12808.9
1% difference from best to worst. (Essentially standard deviation/margin of error stuff here.)

Single core CPU-Z bench (set to single thread to not heat soak the cpu during multi thread test. ...Sorry, I wasn't sitting through 7 single core R23s at this point.)
115 - 659.3
125 - 658.3
135 - 656.6
145 - 656.9
155 - 655.5
165 - 654.3
175 - 653.1
<1% difference from best to worst... (Again, Standard deviation/margin of error range.)

As you can see, not worth losing multi-core for single core. I suggest you do your own testing though, so many factors determine optimal settings.

even so, with how tight amd auto regulation of clocks with zen. those differences can be just run time variations. it is impossible to determine which is best edc settings from such tests.

MikeS3000 · Aug 26, 2021

Putting my new Arctic LF II 420mm to the test! Not bad for just PBO and +50 AutoOC.

boldenc · Aug 26, 2021

EDC 130A worked best for me, I get the highest MT in CB23 compared to 150A. This is with 170W PPT 120W EDC
There is something getting me mad is the single thread boost is not fixed, like sometimes CB23 ST can run the bench with boost up to 5GHz, sometimes 4.95GHz, sometimes 4.9GHz, sometimes 4.8GHz. Same for CPUZ some times my single score bumps to 700 ( I never was able to get 700 again),sometimes 690, sometimes 680.
Even in games sometimes boost to 4.9, sometimes 4.8 in the same game in same areas. (That's all with same settings)
Something in this CPU is playing around, and I am sure it is not from background processes.
And yes I made sure it is the same core being benched in all single core tests.

rdr09 · Aug 30, 2021

Thanh Nguyen said:
Need help for first time AMD user. I tried to oc ram and pc does not post at any setting I use. Flck 1800, ram 3600. Dram voltage 1.55v soc voltage is 1.25v.

Your DRAM and SOC voltages are too high. You might want to ask here . . .

NEW!!! DRAM Calculator for Ryzen™ 1.7.3 (overclocking...

AMD Ryzen Memory Tweaking & Overclocking Guide AMD Ryzen Memory Tweaking & Overclocking Guide MEMbench 0.6 README https://www.overclock.net/forum/27960952-post4412.html HOW USE MEMTEST in MEMbench https://www.overclock.net/forum/28069030-post5047.html DRAM Calculator for Ryzen™ 1.7.3 +...

www.overclock.net

At 3600MHz just lv flck alone. May have to loosen the timings a bit to work. Like if the RAM is designed to run at 16,18,18, 21, for example, try 16,19,19, 39.

BTW, if you are the one who sold me an Asus AM3 motherboard years ago, i like to tell you that it still works paired with a Phenom II 840T used as my HTPC

Thanh Nguyen · Aug 30, 2021

With PBO, those single thread score look so good but how about real life usage? Gaming?

Asmodian · Aug 31, 2021

PBO is better for gaming than a fixed OC, at least in my testing.

KedarWolf · Aug 31, 2021

Someone shared in another thread what PBO settings they are using.

This nets me the below. Passes Core Cycler too. BRB, gonna boot into BIOS, get screenshots.

The Curve offsets are what I know works Core Cycler stable and so far with new settings, stable as well

dansi · Aug 31, 2021

KedarWolf said:
Someone shared in another thread what PBO settings they are using.

This nets me the below. Passes Core Cycler too. BRB, gonna boot into BIOS, get screenshots.

The Curve offsets are what I know works Core Cycler stable and so far with new settings, stable as well

View attachment 2522966

View attachment 2522967

View attachment 2522970

View attachment 2522971

View attachment 2522972

View attachment 2522973

View attachment 2522974

what's your ambient temps? lowering it helps a lot too

KedarWolf · Aug 31, 2021

dansi said:
what's your ambient temps? lowering it helps a lot too

I'm maybe at 68F/20C, I forgot to turn my A/C off when I left for work.

dansi · Aug 31, 2021

KedarWolf said:
I'm maybe at 68F/20C, I forgot to turn my A/C off when I left for work.

that's a cool temp, you can probably raise more edc tdc and ppt in pbo. cinebench can used 250w of ppt if your cpu is cool enough

Thanh Nguyen · Aug 31, 2021

Now my chip can do 47ccx0 ccx0 46ccx1. What is the PBO setting for me?

vigorito · Aug 31, 2021

When i get whea error in event viewer APIC ID 10,okay its core 5 id,but which value in bios under curve optimizer is to change, direct number 5 core id as i see (0-11 are values msi mobo) or Core 4 since core 4 in bios is core 5 in ryzen master

OFFICIAL 5900X and 5950X two chiplet Zen 3 CPUs Overclocking thread

kairi_zeroblade

boldenc

MikeS3000

Milkysunshine

Milkysunshine

Thanh Nguyen

KedarWolf

KedarWolf

dansi

MikeS3000

boldenc

rdr09

NEW!!! DRAM Calculator for Ryzen™ 1.7.3 (overclocking...

Thanh Nguyen

Asmodian

KedarWolf

dansi

KedarWolf

dansi

Thanh Nguyen

vigorito

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