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HWiNFO there is a new beta, quite a few sensor readouts are now fixed. Some still exist due to how "access" to monitoring data has been given to dev, plus SMU firmware needs an update, source someone close to AMD. I have noted at least ~100mV difference of VCORE in HWiNFO vs measured on DMM.
Next some testing I had been doing comparing what I set in bios vs actual VCORE measured on DMM, mobo C6H.
CPU Stock (R7 1700), so ACB is 3.2GHz = ~1.089V steady on DMM for VCORE with x264.
I set 3.7GHz ACB OC, I do no "funky" stuff else in UEFI, set only +0.01875V offset, load x264 = ~1.228V on DMM.
I set 3.8GHz ACB OC, again no "funky" stuff else in UEFI, set only +0.10625V offset, load x264 = ~1.319V on DMM.
I set 3.9GHz ACB OC, again no "funky" stuff else in UEFI, set only +0.19375V offset, load x264 = ~1.409V on DMM.
I set 3.9GHz ACB OC, with LVL 3, set only +0.19375V offset, load x264 = ~1.465V on DMM.
Next format of data:-
+18.75mV offset in bios over +0mV, created actual jump of 139mV.
+106.25mV offset in bios over +0mV, created actual jump of 230mV.
+193.75mV offset in bios over +0mV, created actual jump of 320mV.
+193.75mV offset in bios over +0mV, engage LLC LVL 3, created actual jump of 370mV.
I have scrapped using 3.9GHz ACB OC profile for 24.7 use .
Official info on voltage (which you may see in some reviews, in reviewers own words):-
I'm now going with 3.8GHz ACB OC profile.
Next some testing I had been doing comparing what I set in bios vs actual VCORE measured on DMM, mobo C6H.
CPU Stock (R7 1700), so ACB is 3.2GHz = ~1.089V steady on DMM for VCORE with x264.
I set 3.7GHz ACB OC, I do no "funky" stuff else in UEFI, set only +0.01875V offset, load x264 = ~1.228V on DMM.
I set 3.8GHz ACB OC, again no "funky" stuff else in UEFI, set only +0.10625V offset, load x264 = ~1.319V on DMM.
I set 3.9GHz ACB OC, again no "funky" stuff else in UEFI, set only +0.19375V offset, load x264 = ~1.409V on DMM.
I set 3.9GHz ACB OC, with LVL 3, set only +0.19375V offset, load x264 = ~1.465V on DMM.
Next format of data:-
+18.75mV offset in bios over +0mV, created actual jump of 139mV.
+106.25mV offset in bios over +0mV, created actual jump of 230mV.
+193.75mV offset in bios over +0mV, created actual jump of 320mV.
+193.75mV offset in bios over +0mV, engage LLC LVL 3, created actual jump of 370mV.
I have scrapped using 3.9GHz ACB OC profile for 24.7 use .
Official info on voltage (which you may see in some reviews, in reviewers own words):-
As a general guideline: a CPU voltage of 1.35V is acceptable for driving everyday overclocks of the AMD Ryzen processor. Core voltages up to 1.45V are also sustainable, but our models suggest that processor longevity may be affected. Regardless of your voltage, make sure you’re using capable cooling to keep temperatures as low as possible.
While there are never guarantees with overclocking, the majority of users should find that an 8C16T AMD Ryzen processor will achieve 4.2 GHz @ 1.45V of CPU voltage. Advanced and accomplished overclockers trying to push record frequencies may find more headroom by disabling cores and disabling SMT on motherboards that offer the option in the BIOS.
I'm now going with 3.8GHz ACB OC profile.