Question 5950x getting 4.9Ghz on 1 motherboard, 4.7Ghz on another

[fobos8]

Hi guys

I have rigs with exact same gear and on same bios on MB. On 1 motherboard I'm getting single core speeds of 4.9GHz from my CPU, if I drop it into the other motherboard I get 4.7GHz.

What could be the cause of this?

Kit list for both rigs is below.

Cheers, Andrew


Windows 10 Pro 64-bit
Ryzen 5950x
64GB Dual-Channel Corsair Vengeance @ 1599MHz (16-20-20-38) 4 x 32GB stick
Micro-Star International Co. Ltd. MEG X570 UNIFY (MS-7C35) (AM4) bios from 2019
2047MB NVIDIA GeForce GTX 1660 Ti (MSI)
7452GB Seagate ST8000DM004-2CX188 (SATA ) 36 °C
465GB Samsung SSD 970 EVO Plus 500GB (Unknown (SSD))
953GB Sabrent (Unknown (SSD))
1863GB Sabrent Rocket 4.0 2TB (Unknown (SSD))
Corsair RM1000x PSU

 

[drea.drechsler]

Hi guys

I have rigs with exact same gear and on same bios on MB. On 1 motherboard I'm getting single core speeds of 4.9GHz from my CPU, if I drop it into the other motherboard I get 4.7GHz.

What could be the cause of this?

Kit list for both rigs is below.

Cheers, Andrew


Windows 10 Pro 64-bit
Ryzen 5950x
64GB Dual-Channel Corsair Vengeance @ 1599MHz (16-20-20-38) 4 x 32GB stick
Micro-Star International Co. Ltd. MEG X570 UNIFY (MS-7C35) (AM4) bios from 2019
2047MB NVIDIA GeForce GTX 1660 Ti (MSI)
7452GB Seagate ST8000DM004-2CX188 (SATA ) 36 °C
465GB Samsung SSD 970 EVO Plus 500GB (Unknown (SSD))
953GB Sabrent (Unknown (SSD))
1863GB Sabrent Rocket 4.0 2TB (Unknown (SSD))
Corsair RM1000x PSU

So absolutely all hardware is identical?

Do both motherboards have identical BIOS revision and setups? Just dating from 2019 means they're pretty old anyway, possibly even shipping BIOS'. I'd want to update to latest to get all fixes and updates. I'd compare numbers with BIOS in full default settings, as after a CMOS reset or loading of Optimized Defaults from within BIOS.

And if making these comparisons from within Windows: you have to be very careful to make sure both OS' are set up identically which is pretty hard to do, and to keep common with Windows Update being what it is. Just making sure Power Plan settings are identical can be a pain when trying to maintain a rigidly common configuration. PP settings have major effect on things like processor boosting and sleep states while idling, not to mention background processes that are running.

 

[fobos8]

So absolutely all hardware is identical?

Do both motherboards have identical BIOS revision and setups? Just dating from 2019 means they're pretty old anyway, possibly even shipping BIOS'. I'd want to update to latest to get all fixes and updates. I'd compare numbers with BIOS in full default settings, as after a CMOS reset or loading of Optimized Defaults from within BIOS.

And if making these comparisons from within Windows: you have to be very careful to make sure both OS' are set up identically which is pretty hard to do, and to keep common with Windows Update being what it is. Just making sure Power Plan settings are identical can be a pain when trying to maintain a rigidly common configuration. PP settings have major effect on things like processor boosting and sleep states while idling, not to mention background processes that are running.

Thanks for that. I made a mistake with the bios it is the latest one. Take you point about window will check it out. All gear the same