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post #661 of 697 (permalink) Old 06-07-2019, 06:29 AM
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Do folks have suggested bios settings to adjust for overclocking? Assuming I will need to adjust llc etc... Wondering if there are any threaripper/amd specific settings I should worry about.
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post #662 of 697 (permalink) Old 06-07-2019, 08:16 AM
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Quote: Originally Posted by HBizzle View Post
Do folks have suggested bios settings to adjust for overclocking? Assuming I will need to adjust llc etc... Wondering if there are any threaripper/amd specific settings I should worry about.
Overclocking is CPU specific. The amount of voltage required to sustain a specific clock varies by silicon.

You will need to set the Vcore with the setting paired with the LLC. Someone else may be better at explaining doing P-state OC, but all core is straight forward.

An easy way is to have a program to monitor heat under load. Select a voltage to start, like 1.25V or 1.3V. Then set the all core to around 3.9GHz. Increase by 50MHz at a time until testing shows instability or the Tdie reaches 68C under load. If you haven't reached 68C on Tdie, bump up the voltage by one or two ticks (I think it is 7.5mV resolution on the board, but would need to check as it could be 6.25mV). Alternatively, you can just go up in 25mV increments (0.025V).

Repeat until you are near the Tdie temp and then robustly stress test for stability using multiple programs. After achieving proven stability in robust testing, you should be ready to use the system.

If doing memory overclocking, be aware that later manipulating the SOC voltage can increase the heat output, so leaving 2-5C under the Tdie of 68C would give the needed buffer.

But, if overclocking the memory, plan on spending a large amount of time tuning the ram and doing tests to verify stability. For memory, I set aside about two weeks for tuning and stability testing before I trust it with deployment. Memory errors can even corrupt OS system files. So do a macrium backup for a quick redeployment during or after memory tuning (when you think it is stable, deploy your backup, then run through the HCI memtest, memtest86+, testmem5 v0.12, p95 with the custom sets for stressing memory use, etc.).

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post #663 of 697 (permalink) Old 06-07-2019, 07:49 PM
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Quote: Originally Posted by dalathegreat View Post
I decided to get some second hand ram sticks, went from the Gskill 2133 Hynix (2800mhz OC) to Corsair 3600-Bdie (currently at 3333mhz)

Going above 3400mhz caused memtest errors for some reason. Time to tune some timings!
To get anything past 3200 requires some tunings in place of the stock XMP settings. Try the RAM calculator. You will most assuredly have to bump RAM voltage to around 1.4V.

[Edit] What ajc9988 said.

+1

I let Auto take care of Vcore but I have settled on LLC3 for both cpu and memory for 100% BOINC loading.

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Last edited by Keith Myers; 06-07-2019 at 07:54 PM.
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post #664 of 697 (permalink) Old 06-09-2019, 08:19 AM
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Quote: Originally Posted by ajc9988 View Post
Overclocking is CPU specific. The amount of voltage required to sustain a specific clock varies by silicon.

You will need to set the Vcore with the setting paired with the LLC. Someone else may be better at explaining doing P-state OC, but all core is straight forward.

An easy way is to have a program to monitor heat under load. Select a voltage to start, like 1.25V or 1.3V. Then set the all core to around 3.9GHz. Increase by 50MHz at a time until testing shows instability or the Tdie reaches 68C under load. If you haven't reached 68C on Tdie, bump up the voltage by one or two ticks (I think it is 7.5mV resolution on the board, but would need to check as it could be 6.25mV). Alternatively, you can just go up in 25mV increments (0.025V).

Repeat until you are near the Tdie temp and then robustly stress test for stability using multiple programs. After achieving proven stability in robust testing, you should be ready to use the system.

If doing memory overclocking, be aware that later manipulating the SOC voltage can increase the heat output, so leaving 2-5C under the Tdie of 68C would give the needed buffer.

But, if overclocking the memory, plan on spending a large amount of time tuning the ram and doing tests to verify stability. For memory, I set aside about two weeks for tuning and stability testing before I trust it with deployment. Memory errors can even corrupt OS system files. So do a macrium backup for a quick redeployment during or after memory tuning (when you think it is stable, deploy your backup, then run through the HCI memtest, memtest86+, testmem5 v0.12, p95 with the custom sets for stressing memory use, etc.).
My memory is QVL at 3200 on their list for 4 sticks, and seems to be running fine right now. Will HCI it tonight though.

I might fiddle with the OC today then. Thanks.
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post #665 of 697 (permalink) Old 06-12-2019, 08:40 AM
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Ran HCI Memtest to 2000% so the xmp profile for the ram seems solid. Going to see how much I can boost things tonight.

Anyone have suggestions on LLC modes?
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post #666 of 697 (permalink) Old 06-12-2019, 05:04 PM
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Quote: Originally Posted by HBizzle View Post
Ran HCI Memtest to 2000% so the xmp profile for the ram seems solid. Going to see how much I can boost things tonight.

Anyone have suggestions on LLC modes?
I like LLC3 for both cpu and memory.

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post #667 of 697 (permalink) Old 06-12-2019, 07:19 PM
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Quote: Originally Posted by Keith Myers View Post
I like LLC3 for both cpu and memory.
So I played with some overclocks tonight and the Tdie temp got all the way up to 85.5 at one point. This was at 3.9 @ 1.325v. So when it goes above 68 it starts to throttle, but doesn't necessarily BSOD?
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post #668 of 697 (permalink) Old 06-12-2019, 08:32 PM
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Quote: Originally Posted by HBizzle View Post
So I played with some overclocks tonight and the Tdie temp got all the way up to 85.5 at one point. This was at 3.9 @ 1.325v. So when it goes above 68 it starts to throttle, but doesn't necessarily BSOD?
Don't know, I've never had my Tdie temp ever go above 68° C. But I have custom loop cooling on the cpu.

I end up at ~1.34 -1.38V on PBO Level 2 and fluctuate between 4100-4200Mhz. The PBO on my system just downclocks the cpu frequency to maintain the 68° C. Tdie temp or less.

I've never has a BSOD as I don't run Windows anymore. Very stable system, only gets rebooted for the occasional software update that updates the kernel or system files that require a reboot and I decide that 20 odd days of uptime is sufficient.

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post #669 of 697 (permalink) Old 06-13-2019, 08:29 AM
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Quote: Originally Posted by HBizzle View Post
So I played with some overclocks tonight and the Tdie temp got all the way up to 85.5 at one point. This was at 3.9 @ 1.325v. So when it goes above 68 it starts to throttle, but doesn't necessarily BSOD?
Correct. Tctl should be 27C higher than Tdie.

As you get hotter, you will increase electron leaking and need more voltage. Try reducing your voltage until you get a system halt or bsod.

I do have a cherry chip, but you may be able to use a fair amount less voltage than that at 3.9GHz.

I'm also running a custom water loop, but even those temps seem high compared to when I was running an AIO while waiting for water blocks.

What cooler are you using? What temps at stock? Are you having large disparity between die temps?


Just trying to figure out why so high. In part it may be your cooling solution and P95. Which version are you using? With or without AVX?

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post #670 of 697 (permalink) Old 06-13-2019, 10:37 AM
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Quote: Originally Posted by ajc9988 View Post

What cooler are you using? What temps at stock? Are you having large disparity between die temps?


Just trying to figure out why so high. In part it may be your cooling solution and P95. Which version are you using? With or without AVX?
Cooler: Noctuna NH-U9, in an MATX case, so full IHS coverage. Lot of case fans though.

At stock when under 100% load it will go up and hold steady right at 67.5 after a few minutes. Seen this with Blender BMW render, and P95 Small FFTs.

No disparity between die temps.

I saw it do this when at that voltage with Cinebench R15 and R20, Blender BMW, RealBench stress test, and the newest version of P95, which does have AVX enabled.

When I went back to all stock it would hit right below 68 on TDie both dies and then hover below it.

I have CPU and Case fan mode at performance. wondering if I should go in and make custom fan curves?
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