![]() PBO ON overwhelmed my 240mm radiator, temps shot up to 95 C instantly. Once voltage was set, I tried 4.6 Ghz, crashed, 4.55 Ghz, unstable and landed on 4.5 Ghz all-core. So that is what I used during dialing in the voltage. ![]() 1.293v was it! Each time booting to Windows and running Prime95 smallFFT.Īnd from previous 'experiments' I knew my CPU could do 4.4 Ghz stable. Still not enough, 1.287v, nope, not enough. That was still not enough so I repeated the procedure, plus sign again. You do this by pressing plus sign once on Numpad when CPU voltage line is highlighted in BIOS. Initially it would drop to 1.26 (vdroop in action/LLC) or lower in Prime95 so that wasn't enough voltage. So my procedure was to start at 1.275v in BIOS, LLC 3 and raising CPU voltage til it landed at 1.275 at full load. So during light loads it sits at 1.29 but during Prime95 it drops to 1.27-1.275v. In order to get 1.275 during heavy load, my 5600x is set up to run 1.29v in BIOS and LLC 3 on Asus X470. ![]() This will most likely be different for you so don't copy my settings. So you have to set CPU voltage and LLC accordingly. Can't trust other monitoring programs on Ryzen. Monitor this with HwInfo64 and nothing else. You want to sit at FIT voltage during Prime95 test. If you crash or are unstable, lower CPU clock/ratio. If you pass that for a couple minutes, you should be stable. ![]() You are going to have to test for stability. That said, I used Prime95 smallFFT for everything.Īnd then set up a static OC and static CPU voltage, turn off PBO/CO (Curve Optimizer, shouldn't be on by default but just in case I'm mentioning it). Going above is when you risk degradation." Manually overclock frequency to this only. The FIT voltage is your chip's safe voltage. (torture test) The SVI2 TFN (v-core) reading in HWInfo 64, what that reads, that is your fitness voltage. Run Prime95 128k FFT with in-place unticked. ![]()
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