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post #21 of 54 (permalink) Old 02-09-2019, 02:16 PM - Thread Starter
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Quote: Originally Posted by EarlZ View Post
Would raising the VCCIO/SA voltage help in idle stability or that is purely vcore ?
VCCIO and VCCSA power things like the memory controller and PCIE communications. If their voltage is too low, they could cause system stability problems at any time. They don't power the CPU cores - that is vcore. What is your specific stability issue?

[email protected] (-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
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post #22 of 54 (permalink) Old 02-09-2019, 04:06 PM
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Quote: Originally Posted by jfriend00 View Post
VCCIO and VCCSA power things like the memory controller and PCIE communications. If their voltage is too low, they could cause system stability problems at any time. They don't power the CPU cores - that is vcore. What is your specific stability issue?
I lowered the VCCIO/SA last night while still running at 2133Mhz on my ram and I got a BSOD on idle, I am not sure how long it took for the BSOD to happen as I left it over night. That was the only thing I changed and haven't had a BSOD on idle for the entire week.

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post #23 of 54 (permalink) Old 02-09-2019, 04:31 PM
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Prime95 AVX disabled.
Overclocking i7 9700k 4.9GHz LLC AUTO, DVID -0.170 = 1.320v-1.332v
Max temperature 96c ambient 71F,
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post #24 of 54 (permalink) Old 02-11-2019, 12:18 AM
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@jfriend00

Will you be running at 5.1Ghz for daily usage ?

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post #25 of 54 (permalink) Old 02-11-2019, 12:42 AM - Thread Starter
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Quote: Originally Posted by EarlZ View Post
@jfriend00

Will you be running at 5.1Ghz for daily usage ?
I am figuring that out. I've been running at 5.1 for a couple days now and it has been perfectly stable. I probably need to do some more stress testing both with and without AVX to more firmly establish whether the temperatures are OK with my air cooling. And, before doing that, I want to improve the airflow through my case a bit by rearranging some hard drives so there's an uninterrupted airflow from the front intake fans right to the CPU cooler intake. It's also possible I could lower VCCIO and VCCSA some which could remove some heat from the CPU and since I finished my memory tuning, I haven't tried to minimize those yet. This may give me a little better temps.

One limitation here is that there isn't a separate voltage for AVX and non-AVX. So, while I had OK temps at 5.0 non-AVX and 4.9 AVX (-1 offset), I'm probably going to have to do 5.1 and -3 or -4 AVX offset to keep the AVX temps in check at this higher voltage. The extra voltage needed for 5.1 makes the 4.9 AVX (which I was using before) too hot. So, to get faster non-AVX, I'd have to go with slower AVX. Maybe not a net win.

It takes a lot of extra voltage/heat on this chip to get it from 5.0 to 5.1 which probably means the sweet spot of this chip is really at 5.0.

My guess now is that I may dial back to 5.0 to have lower temps and faster AVX. Will know more when I spend some more time working on it.

[email protected] (-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
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post #26 of 54 (permalink) Old 02-12-2019, 02:41 PM
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Sounds like a good plan,the VR Vout range though to 1.391 is that still a safe voltage for gaming use ?

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post #27 of 54 (permalink) Old 02-12-2019, 03:11 PM
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Quote: Originally Posted by EarlZ View Post
Sounds like a good plan,the VR Vout range though to 1.391 is that still a safe voltage for gaming use ?
What is VR vout and where do you read it?

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post #28 of 54 (permalink) Old 02-12-2019, 04:22 PM - Thread Starter
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Quote: Originally Posted by wingman99 View Post
What is VR vout and where do you read it?
VRVout is a voltage option shown for some motherboards and some CPUs in HWiNFO64. From what I've read, it's a newer method of reporting processor input voltage that comes from a sensor in the actual CPU. It is supposed to more accurately represent what actual voltage is being fed into the CPU than VCore which was measured somewhere on the motherboard. Measuring further from the CPU is upstream of voltage drops that can occur at high load current because of resistance and thus doesn't as accurately show what the actual CPU is getting in high load circumstances (which is when the voltage is most critical).

I've since rearranged the rows in my HWiNFO64 screen, but VRVout for me was about 2/3 of the way down from the top (I had to scroll down to see it). I've since dragged it up with the other voltages I like to monitor so they are all together.

Here are a couple discussions involving VR Vout which should give you more info.

HWinfo Vcore vs VR VOUT

Which Vcore - Vcore or VR VOUT?

[email protected] (-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
jfriend00 is online now  
post #29 of 54 (permalink) Old 02-12-2019, 05:11 PM
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Quote: Originally Posted by jfriend00 View Post
VRVout is a voltage option shown for some motherboards and some CPUs in HWiNFO64. From what I've read, it's a newer method of reporting processor input voltage that comes from a sensor in the actual CPU. It is supposed to more accurately represent what actual voltage is being fed into the CPU than VCore which was measured somewhere on the motherboard. Measuring further from the CPU is upstream of voltage drops that can occur at high load current because of resistance and thus doesn't as accurately show what the actual CPU is getting in high load circumstances (which is when the voltage is most critical).

I've since rearranged the rows in my HWiNFO64 screen, but VRVout for me was about 2/3 of the way down from the top (I had to scroll down to see it). I've since dragged it up with the other voltages I like to monitor so they are all together.

Here are a couple discussions involving VR Vout which should give you more info.

HWinfo Vcore vs VR VOUT

Which Vcore - Vcore or VR VOUT?
Thanks for the information.

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post #30 of 54 (permalink) Old 02-14-2019, 02:14 PM
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Can u still use the which ever setting down clocks the CPU ? I would like to try offset voltage OC, but what voltage level is the base or reference ? Is it what ever the CPU would get at stock clocks, if u set auto?

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