Don't buy this motherboard! GIGABYTE B450M H

tomcer2003 · September 22, 2021

Hi, so today I repaired pc and noticed something weird. PC was crashing while booting to windows (that eventually brought it to blue screen). Customers had it in 3 repair shops and they said that motherboard or cpu was bad. So he called me. He was using pc with gigabyte b45pm h and r5 3600. He bought new motherboard (some Asus b550, it is some rog, idk) it was doing same thing. So set cpu to 3Ghz 1.4V vcore and system to 1.1(from 1.05). Ram to 1.4V. And system started working. So I did some testing and cpu was so degraded that it can only run 4.05Ghz with 1.375V and 1.1V (that other important rail that is supposed to be at 1.05V) So system could pass prime 95. I brought gigabite bord home and tested it. It was putting 1.44V under load!! Cpu used while testing was r7 3700. Original cpu (r5 3600) was never overclocked for information. This is ridiculous, did anyone noticed this weird behaviour with cheap AM4 motherboards?

Skiiwee29 · September 22, 2021

Thats normal voltage at stock/idle for Ryzen 3000 and 5000 series CPUs because of the way PBO works. Once its under load you will see voltages go way down, usually in the 1.1 to 1.2v range all core.