Guys, as
@Shadowsong told us Bios 1.40 is available since the 12th of August ! We have now Agesa 1.2.0.2, and Performance Boost Override and Curve Optimizer with advanced settings are available in the Bios ! \o/
So I updated and told myself it was a good time to start playing with CPU fine tuning to try to max out the watt / performance ratio...
I followed two ways : the first one is PBO + CO fine tuning, and the second one, CTR 2.1 RC5
PBO + CO fine tuning :
More information here :
https://www.reddit.com/r/overclocking/comments/octeuh
The main advantage is that you still have boost enabled for one threaded applications with this configuration, so you can achieve between 4800 and 5100 Mhz boost depending on your proc and cooling system
It's much longer to fine tune than CTR which makes it all automatic for you, here are my results :
Fine tuning PBO and CO following the video tutorial :
PPT 200
TDC 150
EDC 150
Curve Optimizer set to -20 on all core
I didn't take the time to test which core was failing at -25, as the watt consumption with these parameters didn't satisfy me for my usage (335 Watts on Cinebench R20 benchmark)
CTR 2.1 RC5 :
This soft is so easy to use ! In a matter of seconds it is able to tell you the optimized frequencies for each CCX depending on the voltage you use for each profile. If your workload works on WIndows, you can let the software start at boot and automatically switching profiles depending on your workload, allowing you to boost for monothreaded applications or optimizing efficiency when all your cores are working on multithreading apps.
My workload is containerization on Linux, so I will just use the P1 multithreaded profiles and put the values in BIOS.
Here are the synthetic results :
Watts measurements are taken from the computer plug with this tool (
https://www.amazon.fr/54365-Compteu...1&keywords=mesure+watt&qid=1632214282&sr=8-16)
For CTR results, Voltage and CCX frequency are calculated by the soft
Configuration | Voltage (mA) | CCX1 Frequency (Mhz) | CCX2 Frequency (Mhz) | Cinebench R20 Score | Watt on 100% CPU |
Stock config PBO enabled no advanced config | (max voltage seen with HWINFO) 1387 | 4400 | 4400 | 11057 | 340 |
Stock config PBO with advanced config | forgot to check sorry | forgot to check sorry | forgot to check sorry | 11300 | 335 |
Stock config PBO disabled | 1125 | 3930 | 3930 | 10115 | 203 |
CTR Undervolt 1 | 1000 | 3900 | 3825 | 9982 | 176 |
CTR Undervolt 2 | 1050 | 4100 | 4000 | 10445 | 196 |
CTR Undervolt 3 | 1100 | 4250 | 4150 | 10840 | 215 |
CTR small overclock 1 | 1150 | 4425 | 4300 | 11250 | 238 |
CTR overclock 2 | 1200 | 4550 | 4400 | 11535 | 250 |
CTR overclock 3 | 1250 | 4625 | 4475 | 11740 | 290 |
The next try at 1300 mA, 4700 Mhz CCX1 - 4550 Mhz CCX2 was not successfull, error popped out from Cinebench at first run.
Looking at the number, I decided that overclock 1 was a good basis for working on final values and putting them in BIOS. Sadly the Bios does not give an option to put different values for each CCX, so you've got to put the same Frequency for both.
At 1150 mA, 4425 Mhz was not stable in Cinebench, error popped out fast enough, like at the second or third run. First run still had 11311 points
At 1150 mA, 4375 Mhz, error popped out around the 15th pass. 11230 points though
At 1150 mA, 4350 Mhz, no errors after half an hour of cinebench ! \o/ 11114 points on Cinebench R20 and 28649 on Cinebench R23, Watts are around 230 on full load, temperatures don't go over 70°, I'm happy with these numbers
IMO it's still a lot better than stock with or without PBO activated !
If you want to optimize your RIG and your OS is windows, update to the last BIOS and use CTR, for me it is a no brainer. If your OS is Linux, make your choice between boost with PBO or stable frequencies for multi threading !
Happy under/overclocking