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post #1 of 9 (permalink) Old 03-06-2020, 11:06 AM - Thread Starter
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set max boost speed for this cpu

Hi

I have the cpu 3800x and motherboard Asus tuf + wifi x570. How I can set this cpu speed to boost speed 4.5GHz like in the specification ? I am looking for one setting without manipulate other OC settings ?
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post #2 of 9 (permalink) Old 03-07-2020, 12:28 AM
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Quote: Originally Posted by Welliam View Post
Hi

I have the cpu 3800x and motherboard Asus tuf + wifi x570. How I can set this cpu speed to boost speed 4.5GHz like in the specification ? I am looking for one setting without manipulate other OC settings ?
Look for PBO and it's settings in the BIOS.

Asus Prime x470 Pro BIOS 5406 1004b
R7 3700x. CM Nepton 140XL
2 x Kingston HyperX KHX3600C17D4/8GX
Samsung 960 Evo 250GB
Asus strix 570 OC 4gb
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post #3 of 9 (permalink) Old 03-07-2020, 01:30 PM - Thread Starter
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Quote: Originally Posted by MishelLngelo View Post
Look for PBO and it's settings in the BIOS.
Thanks, I tried to play with scaler and add 100Mhz but did not see it maintain 4.5Ghz. Can you tell me which settings to change and why ?

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post #4 of 9 (permalink) Old 03-08-2020, 04:53 AM
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Only scalar to max and Boost to 200 or auto. How far it would boost also depends on temperature and bellow 65c is most desirable.
Scalar mostly determines how long single core boost will last (miliseconds or until critical temp is reached on that core).
More important than single core max is how close other cores perform to that single core boost.

Asus Prime x470 Pro BIOS 5406 1004b
R7 3700x. CM Nepton 140XL
2 x Kingston HyperX KHX3600C17D4/8GX
Samsung 960 Evo 250GB
Asus strix 570 OC 4gb
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post #5 of 9 (permalink) Old 03-08-2020, 10:52 AM - Thread Starter
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Thanks MishelLngelo, I will try that. The 3800x is very good it has heavy metal spreader and cooper pipes and base so the temp is very good.
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post #6 of 9 (permalink) Old 03-08-2020, 12:37 PM - Thread Starter
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I tried scaler to max 10x and boost override to 200 but the max speed is alwayes 4.1 under load with temp of 79C. in idle it is 50 ~ 58C.

should I change CPU ratio to 45 ? without any change in voltage.
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post #7 of 9 (permalink) Old 03-08-2020, 12:47 PM
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PBO scales with consideration of things like load, PBO parameters, internal current limits, temperatures, voltage offsets, motherboard capability, cooling capability, phase of the moon, and whether or not it "feels like it". You can't force it to boost higher.

Anyway your idle temperatures sound high, mine are in the low 30s, are you using stock cooler (Wraith Prism)? Temperatures being too high will prevent PBO from boosting much at all.

And changing the CPU ratio is an entirely different ballgame and puts the system into Manual OC mode. It will force all cores to run at that speed all the time, even if unstable or dangerous. If you DO go for manual OC, you must always set a voltage with it, leaving it on "Auto" is dangerous and the mobo can pick a voltage that is way too high. You should also not start with 45. Maybe try something safer, like 40 / 1.28v, then up the multiplier from there and see what you can get at that voltage to get a feel for it. But fix your temps first..
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post #8 of 9 (permalink) Old 03-08-2020, 12:53 PM - Thread Starter
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yes I am using stock cooler , what you use ?
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post #9 of 9 (permalink) Old 03-09-2020, 01:30 PM
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Instead of the PBO setting to auto try Enabled if it is an option. On the MSI motherboards, at least, that raises the power limits that the chip can use to boost.

MSI MEG X570 Ace
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