Originally Posted by EarlZ
The fixed voltage was set for 1.360, VR Vout is reporting 1.330~1.348
I dont intend to run at fixed voltage but I wanted to test it out see if my chip can really handle 5Ghz, I intend to use Adaptive. I am using the Gigabyte Z390 Master, My apologies if this was not indicated.
VCCIO is at 1.150 and VCCSA is at 1.250, cooler is a Noctua D15S with a single fan.
Cache is left at auto which defaults to X43
I just need a way to put a hard limit on the voltage for it to never go over 1.348v as the overshoot is very high on sudden load changes like ending a prime95 run or when it changes to a certain FTTsize, it can over shoot to 1.367~1.45 during that transition.
If you intend to run at adaptive, I've never understood why the recommendation is to start at fixed. I find that completely counterintuitive.
If you want to run on adaptive (which I did), what you're trying to find is what setting on adaptive will give you stability at a certain speed. So, after messing with Fixed voltage for awhile in my setup and not really learning anything particularly useful (other than the fact that VR VOUT varies a bit, even when on Fixed) , I just switched over to adaptive and started playing with the offset. I would note the min/max VR VOUT voltages and temperatures for each test run so I could compare them to each other and understand what was going on. I ended up finding a nice negative offset voltage on adaptive that gave me good stability at 5.0 and proved to myself that even with a hefty positive offset, I couldn't get stability at 5.1. So, I had my limit at 5.0 and a good configuration for 24/7 running.
Obviously, every CPU and motherboard is a bit different so I'm not suggesting my settings work for you, but I do think the process might be useful.
FYI, once I proved stability at a certain CPU multiplier, I found that finding how low I could make VCCIO and VCCSA really helped a lot with CPU temperatures. My temps under load dropped meaningfully by lowering VCCIO and VCCSA without sacrificing stability. And, dropping the CPU adaptive offset by even 5mv helps with temps to (provided you still have stability).
(-1 AVX offset) on ASRock Z390 Taichi
with Noctua NH-D15 air cooler
CPU offset voltage of -25mv, runs VRVout 1.240-1.313V on full AVX load, 1.225-1.275V on non-AVX load
2x8GB [email protected] at 1.45V
, G.Skill F4-3733C17Q-32GTZKK (XMP rated [email protected]
EVGA GTX 1060 6GB OC with Corsair RMx 750W power supply
Samsung 970 EVO 500GB NVMe boot SSD and four other drives all in a Fractal Design R6 Case