Your CPU is not defective, you are just getting a lower score in R20 than you should. This indicates something maybe not enabled in the BIOS. PBO, Precision Boost Overdrive, is not normally enabled on motherboards by default. Mine was set to Auto which seemed to never use it. You would most likely get scores that are closer to what everyone else gets if you enable it in the BIOS. My 3900X scored lower in R20 bench tests as well compared to what others were getting and it was my PBO settings. By default A-XMP, memory settings, and PBO seem to be not enabled(turned on) by default. Being that you are building your own system you will find that somethings you need to enable or change to get the best performance.
MSI MEG X570 Ace
AMD Ryzen 9 3900x
Corsair H115i Platinum, Corsair Crystal 570x RGB Case
32GB G-Skill Trident Z Neo 3600 [email protected] 3800 14-15-15-15-30
MSI Geforce RTX 2080 Super Ventus SX OC w/ Acer Predator X34P
I am fiddling with X570 Taichi and I cannot get an OC at 4.3 or 1.30v with R3900x ,, I also have ASUS ROG Strix X570-E Gaming and with this I get 4.3 at 1.25v with the calibration at minimum
Is anyone working with this board ?? I can't achieve something stable