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PC Processors

Macbang
Adept I

5800X3d never reach boost of 4.5ghz, it just locks at 4.449Ghz

Why is CPU locked at 4.449ghz in games and C20 or C23 runs??

 

första 5800x3d.PNG

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1 Solution

it seems to have helped, but i also put performance enhancer mode from AUTO to level 3 OC in bios, of my Asus X570 E gaming motherboard

Screen Shot 11-03-22 at 03.38 AM.PNGScreen Shot 11-03-22 at 03.26 AM.PNG

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9 Replies
DimkaTsv
Miniboss

Ah, that is simple. Because Bus speed can hover around 99.98-100.03 mHz, depending on mobo and settings and actual CPU speed is determined from this by multiplier. So it can be 99.98*45=4499.1 mHz. And different tools reports stuff more or less precise. 
For HWINFO 99.98 = 100.00 basically, because normal step for BCLK is 0.1 mHz even for top tier motherboards iirc. 

DimkaTsv_0-1667342741644.png

 

Another possibility as there is some another factor that limits max boost clock for this specific core. Like for my cores it can be voltage requested (they likely get to border of their V/F curve even despite offset). But it shouldn't be an issue for 4500 mHz, though. More than that, it only affects effective clock, not nominal clock. 

Matt_AMD
Community Manager

Disabling spread spectrum in the bios might help you hit the round number of 4.55Ghz on 1-2 CPU cores.

it seems to have helped, but i also put performance enhancer mode from AUTO to level 3 OC in bios, of my Asus X570 E gaming motherboard

Screen Shot 11-03-22 at 03.38 AM.PNGScreen Shot 11-03-22 at 03.26 AM.PNG

 

Improvements are real

 

Screen Shot 11-05-22 at 12.08 AM.PNG

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Hi, i know this is a old thread. May i know what bios setting did you configure to get the boost clock pass 4643Mhz ? I have the same proc & mobo with you. My maximum boost is 4550Mhz for a few cores. Can you share the bios settings? Thanks.

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Hi, enthusiast I'am faceing with next gen Zen5 now, but yes I have some Bios capture of this BCLK 102.25 setup

5800X3D_3954CL15_GearOFF_102,25_PBOLimitsOFF_CO-PerCore_LCLK DPM off.png

IMG_20240114_080603_edit_156086471415196_copy_3456x2315.jpg

IMG_20240403_232923.jpg

IMG_20230812_212209.jpg

IMG_20240831_165803_copy_2304x1036.jpg

IMG_20240831_165736.jpg

Thanks for sharing, i tried to change BLCK settings pass 100 and pc won't boot, it looks like i still have to change other settings in bios.

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Tatilica
Journeyman III

https://drive.google.com/file/d/15MZe1sfk0vQZKtrIdkxyurU1WpCJNiDo/view?usp=drivesdk

Hi guys, as you can see, then YES 5800X3D can do 4.55ghz all cores in games only BCLK 102.25 C-states & CCPC Preffered Enables in BIOS CO-22

https://drive.google.com/file/d/15NH1HjftQvjEHynFKWWz_K219Lbdx8aK/view?usp=drivesdk

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by chance is your monitor refresh rate set to 59.9999Hz also?

 

 

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