My build is 2 weeks old and this is my first one :
-1600X@ 3.6ghz 1.20v stock ( displayed on bios ), MSI X370 gaming pro carbon bios version 1.50 ( updated at the first start, no WHQL 1.60 since then ), Noctua nh-u14s, Corsair lpx 3200C16R at 2667 MHz cl14 ( via memory try it! in bios ) Gtx 1070 gaming X, Corsair rm650x, Be quiet silent base 800, thermal grizzly compund, ssd evo 500 GB, seagate barracuda 2TB, Win10 64bits .
Under HWINFO64 my idle cpu core voltage fluctuates between ~0.8v and ~1.53v which involves temps between ~30°C and today ~62°C pike on Tdie , with only Norton, Nvidia Geforce experience, realtek audio in background plus firefox with 4 tabs and hwinfo64 activated . Yesterday I played Shadow tactics: blades of the shogun for one hour and the temps didn't exceed 58°C according to hwinfo.
I don't want to oc my cpu, just let the turbo doing its job and use my system the way it has been presented by manufacturers ( i'd also like to hit 3200 MHz with my DIMM but when i tried to a-xmp it ( after the first launch and bios update ) it didn't succeed , the ram was stuck at 2133 mghz at 1.36v so I found memory try it! and stayed at 2667 cl14 @ 1.36V ( stable ) being afraid of blocking the bios trying to go higher and have to clear CMOS ect ... I don't want to take any risks and it shouldn't be the case. )
This 1.53v is way too high and is very bad for the cpu, it's been said that with my air cooler it would be better not going over 1.40v and for cpu longevity not going over 1.45v. I found and read this topic : https://community.amd.com/message/2805219 .
There's an answer into it but not concerning the same motherboard. Are the cpu volt at 1.375v and soc at 1.1875v sure for the x370 pro carbon ?
Do these settings involve that they won't go any higher ? Is it a limit ?
Why does the cpu reacts with such "modulations" ?
Is it because of the PSU ?
Is it good for the ram to be at 1.36v and not 1.35 ( according to msi ram compatibility site page for x370 carbon MB ) ?
With CPU voltage left on Auto it will switch between many voltage states, none of which are damaging to the CPU. The CPU makes the calls to swap to different states very quickly, faster than monitoring software can display. Ryzen still does not have perfect memory compatibility even with AGESA 220.127.116.11, especially with Hyinx made RAM, and that is perfectly acceptable voltage.
OK. How do you know this corsair ram is hynix made ? On msi site it's shown as samsung...
From what you said , setting any cpu voltage will make it constantly run at this voltage, right ?
They used to be Samsung, so unless you bought it waaaaay back it's Hynix. CL14 is Samsung, CL16 is Hynix. Price is also a good indicator, the ones that come with Hynix are dirt cheap compared to the Samsungs.
I bought them 152.89 euros on amazon in May the 29th ... they're 162 euros just now . Ryzen is a 2017 product, how could msi have made this mistake announcing that 3200cl16r is samsung made and can run at 3200 on x370 pro carbon ? Or maybe is it due to my cpu IPC ?
Mobo manufacturers have a lot of memory modules on stock and MSI probably had v.4.31 which is Samsung. It's not really their fault for Corsair using the exact same serial number for their newer Hynix based modules (pretty indecent move I'd say).
1.375v should hold 3.6ghz stable if you want to lock cpu at 3.6ghz. with the multiplier. the voltage jumping up and down is the cpu using voltages a little higher to keep from crashing.
i would set ram at 1.4 for stabiltiy which is fine. the 1.1875 on the SOC is good dont go over 1.2 the soc helps ram run stable. if you dont want to get into setting many voltages just let it on turbo and auto.
the ram you should manually put timings in and set voltage as mentioned .. 1.4 and soc 1.1875 you may get a higher clock on ram this way.
if it was me i would call corsair and see what they have to say then the distributor and once its known they are not samsung request exchange or refund for g.skill flare x 3200 sticks.