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post #1 of 5 (permalink) Old 02-24-2020, 03:21 AM - Thread Starter
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Ryzen 3000 PBO question....

I have PBO and Auto OC enabled and the +200mhz off set and all that good stuff.

I manually set voltage to 1.3. Should I leave it at that, or just set it to auto?
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post #2 of 5 (permalink) Old 02-24-2020, 05:58 AM
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Quote: Originally Posted by RWBY FNDM View Post
I have PBO and Auto OC enabled and the +200mhz off set and all that good stuff.

I manually set voltage to 1.3. Should I leave it at that, or just set it to auto?
Auto
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post #3 of 5 (permalink) Old 02-24-2020, 06:49 AM
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Auto but depending on MB and BIOS, you can also try with negative offset of about .0.05 - 0.1v.

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 #4 of 5 (permalink) Old 02-25-2020, 04:32 PM
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In that scenario you limit the max voltage it may use to 1.3v, which means it will cut back on the boost clocks. I think it also prevents downvolting on idle, though clock speeds will still reduce.
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post #5 of 5 (permalink) Old 02-25-2020, 11:37 PM
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As I said, depends on MB, BIOS and probably even on particular CPU. I have auto starting voltage 1.100v which goes up to 1.42v on auto but drops to 1 1.326v at full load with PBO to max. With -0.05 negative offset. max voltage drops under 1.4v at idle but only to 1.32v at full load. that's enough to keep temps under 65c (mostly 62c depending on environment temps) and results with 4.4GHz boost on single cores, 4.317GHz on others.
A friend has also 3700x but on MSI b450 Max MB and he can go to -0.1v offset with further reduction in temps with same frequencies a mine.
So, it's not some universal value but changes from case to case.
Picture is from my best case scenario in cool environment. Normal scores range from 5008 to 5024.
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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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