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post #781 of 906 (permalink) Old 06-01-2020, 06:25 PM
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no need to use master. i doubt it will make you boost any higher.
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post #782 of 906 (permalink) Old 06-02-2020, 12:35 AM
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Quote: Originally Posted by dansi View Post
no need to use master. i doubt it will make you boost any higher.
Quote: Originally Posted by dansi View Post
no need to use master. i doubt it will make you boost any higher.
I agree. I pretty much figured out the rule of thumb on my setup. It's all about temps. ~50 is like 4275 ~60 4250 ~68 4175 ~70 4150 etc.
I can undervolt vcore / SOC to lower temps but then I have to increase the scaler for the higher boost to compensate and I get the same 9800+ scores and temps.
I can increase LLC ; that seems to allow higher temps on certain frequency but frequency caps at lower frequency as llc increases.
Not much else to test unless I can lower my temps additional 8c to get CB20 10000 score with PBO. Seems like it should boost max until 80c.

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post #783 of 906 (permalink) Old 06-02-2020, 01:06 AM
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Quote: Originally Posted by dansi View Post
9800 cb on pbo is very good, the baseline is around 9500 pbo. I guess you overclocked your ram to tight 3800? or very good ambient temps for all cores to stay boosted?

You could get higher on ST, i seen 538 pbo, but i dont think it is worth the effort anymore.

what are your bios bios setting, im interested to know.

#pbo4lyfe (at least coz' p95 was stable on pbo for me)
I'm done with testing the configuration. In the process I never did hit 538 but I did single core boost 4.7! Kind of figured out the pattern between under voltage, LLC, scaler for my setup. In the end, it's just the temps. Pretty much what everyone already knows.
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post #784 of 906 (permalink) Old 06-02-2020, 01:15 AM
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Quote: Originally Posted by Steven Stacy View Post
I agree. I pretty much figured out the rule of thumb on my setup. It's all about temps. ~50 is like 4275 ~60 4250 ~68 4175 ~70 4150 etc.
I can undervolt vcore / SOC to lower temps but then I have to increase the scaler for the higher boost to compensate and I get the same 9800+ scores and temps.
I can increase LLC ; that seems to allow higher temps on certain frequency but frequency caps at lower frequency as llc increases.
Not much else to test unless I can lower my temps additional 8c to get CB20 10000 score with PBO. Seems like it should boost max until 80c.
LLC increases temperature = lower clocks... But you need more voltage for higher frequency... Temperature & voltage battle each other for frequency gains with PBO. You hit the sweet spot and your good and all you can do is try maximize cooling the last few increments.

The higher voltage will help in low current single-core to boost higher but your all-core Cinebench & Prime95 AVX etc will not get better as you are temperature limited according to the algorithm.

You can change the temperature limit in PBO settings. AUTO is 90C as far as I've seen yet. If you are adventurous you can choose 95C but above you might issues with stability if you allow it to run long hours.

I've found that about ~100A TDC is the limit that you able to cool per 8-core CCD-die with your cooling even if using waterblocks. So 3950X could do 200A TDC with proper cooling until temperatures become unmanageable.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
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Last edited by Nighthog; 06-02-2020 at 01:55 AM.
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post #785 of 906 (permalink) Old 06-02-2020, 04:07 AM
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Quote: Originally Posted by Steven Stacy View Post
I agree. I pretty much figured out the rule of thumb on my setup. It's all about temps. ~50 is like 4275 ~60 4250 ~68 4175 ~70 4150 etc.
I can undervolt vcore / SOC to lower temps but then I have to increase the scaler for the higher boost to compensate and I get the same 9800+ scores and temps.
I can increase LLC ; that seems to allow higher temps on certain frequency but frequency caps at lower frequency as llc increases.
Not much else to test unless I can lower my temps additional 8c to get CB20 10000 score with PBO. Seems like it should boost max until 80c.
Yes, my thread on PBo + undervolt.

https://www.overclock.net/forum/10-a...0-part-ii.html

I guess the next step is to change any voltage to 'normal' which in gigabyte bios means the least voltages driven or stock.
Then undervolt your vcore. The thing with undervolt, it will lose you single / low cores performance if overdoing it. Just need to find the right balance

Seems the 3950x is best with undervolting, and on gigabyte boards. Certain boards have issue with pbo, certain chips hate undervolt
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post #786 of 906 (permalink) Old 06-02-2020, 10:29 AM
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Quote: Originally Posted by Muqeshem View Post
this is my run for classroom using blender. Could you please try it out and see if someone scores below 4 minutes flat.

Sub four-minute Blender I just ran.

My Blender on my Godlike, the quoted first one was my Unify.

I expected to get an only marginally better overclock on my Godlike, it's pretty much CPU dependent.

Still, a decent Blender run.


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post #787 of 906 (permalink) Old 06-02-2020, 10:39 AM
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Quote: Originally Posted by KedarWolf View Post
My Blender on my Godlike, the quoted first one was my Unify.

I expected to get an only marginally better overclock on my Godlike, it's pretty much CPU dependent.

Still, a decent Blender run.

Nice, Getting 4:04.

Hopefully I get better scores when I get the mounting kit for the cooler and some B-Die ram.

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post #788 of 906 (permalink) Old 06-02-2020, 07:39 PM
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Quote: Originally Posted by dansi View Post
Yes, my thread on PBo + undervolt.

https://www.overclock.net/forum/10-a...0-part-ii.html

I guess the next step is to change any voltage to 'normal' which in gigabyte bios means the least voltages driven or stock.
Then undervolt your vcore. The thing with undervolt, it will lose you single / low cores performance if overdoing it. Just need to find the right balance

Seems the 3950x is best with undervolting, and on gigabyte boards. Certain boards have issue with pbo, certain chips hate undervolt
Funny you saying that. This morning before heading out on a call, I set the LLC normal, undervolted vcore -.024 and left soc normal with no offset. I set the scaler to 9x. I got 9867 and 529. But I think I'm running like a deg cooler. 3 CB20 runs back to back with max 68.6c.
I'll check out your thread. I'm not sure how to get cooler unless flip the bottom rad as intake. That rad has airflow entering it about 4 deg warmer then ambient. I'm sure the loop balances out anyway so I'm sure that won't help.

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post #789 of 906 (permalink) Old 06-03-2020, 02:16 AM
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Quote: Originally Posted by KedarWolf View Post
My Blender on my Godlike, the quoted first one was my Unify.

I expected to get an only marginally better overclock on my Godlike, it's pretty much CPU dependent.

Still, a decent Blender run.

You are using a higher overclock and voltage, thus the lower result. I am not sure if memory overclocking would shave 2 seconds from the test or not.
I tried to overclock my memory but i get errors in TM5, so I stopped playing with the memory since I started to get bsod in windows.
I am using a 280mm aio, and to me doing blender and getting 68 degrees max on the test after running it 4 times in a row is just perfect for me. I don't care if it can do it in 4:30 minutes.
Won't lie though, I would love to get 3:50 minutes on blender classroom.

Cheers.
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post #790 of 906 (permalink) Old 06-04-2020, 06:51 PM
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Quote: Originally Posted by Awsan View Post
I bench everyday with the same settings with the same temps and everyday I get a different score ranging between 9500-9900 and single of 480 to 520.

So either have an insanely bloat-free version on another drive or USB drive or live with it as it is.

Thanks A lot Microsoft
On Windows 7, the score will stay exactly the same, all the time.
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