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Trident Z Royal DDR4-4000 XMP II - What should vccio/vccsa be approximately?

 
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post #1 of 9 (permalink) Old 11-29-2019, 12:36 PM - Thread Starter
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Trident Z Royal DDR4-4000 XMP II - What should vccio/vccsa be approximately?

Does anyone know what VCCIO/VCCSA voltage I should be setting for my ram?
I have been stress testing a new gaming pc I built last week with an
Asus Rog Maximus XI Extreme eATX Motherboard
9900KS
G.Skill Trident Z Royal DDR4-4000 CL17-17-17-37 4x8gb

I am testing 1.32V at 5.1ghz all cores (0 AVX offset, LLC at 5)
I set XMP II to get it to 4000mhz on the ram (during testing also) and I had VCCIO/VCCSA on Auto and then I noticed it was setting it at 1.424V in HWiNFO when I checked it.

I spoke to a few people in the forums and they said to set it manually lower because it's too high.
I put it at 1.20V for both VCCIO/VCCSA

Is that normal for this ram kit? It is a pretty good ram kit that I bought, but I think I may have had a restart during a RealBench 2.56 1 hour stress test that I started to do.

I just started another realbench 2.56 stress test to see if it happens again and set it again to 30 minutes (it's at 18 minutes in and no issues)

Anyone know where the issue could be?

Specs: Asus Maximus XI Extreme eATX, i9 9900KS, Aorus Xtreme 2080 Ti, G.Skill Trident Z Royal DDR4-4000 4x8, 970 Pro 1Tb
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post #2 of 9 (permalink) Old 11-29-2019, 12:46 PM
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I'm surprised you can get away w/a 1.20V VCCSA/VCCIO setting for DDR-4000. It takes 1.17V to get my RAM to DDR4-3200 (which is overclocked from 2800Mhz.).
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post #3 of 9 (permalink) Old 11-29-2019, 01:07 PM - Thread Starter
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Quote: Originally Posted by 8051 View Post
I'm surprised you can get away w/a 1.20V VCCSA/VCCIO setting for DDR-4000. It takes 1.17V to get my RAM to DDR4-3200 (which is overclocked from 2800Mhz.).
I'm not quite sure if it does work at 1.20V safely yet. I ran Prime95 26.6 for hours and nothing happened. Started RealBench 2.56 and there was a crash I believe (im at work doing this remotely so i cant tell for sure, but the computer restarted which should mean it crashed during the stress test).

Im redoing it now but either way, I may increase it to 1.22V and do some more testing.

Specs: Asus Maximus XI Extreme eATX, i9 9900KS, Aorus Xtreme 2080 Ti, G.Skill Trident Z Royal DDR4-4000 4x8, 970 Pro 1Tb
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post #4 of 9 (permalink) Old 11-29-2019, 01:21 PM
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Quote: Originally Posted by 8051 View Post
I'm surprised you can get away w/a 1.20V VCCSA/VCCIO setting for DDR-4000. It takes 1.17V to get my RAM to DDR4-3200 (which is overclocked from 2800Mhz.).
Coffee lake IMC's (at least for 9900K/KF/KS) are pretty strong usually. My 9900k's IMC is actually pretty bottom of the barrel compared to others but I can still do 4000 quite easy with 1.15v VCCSA/IO on a kit of b-die. Board also has a big say in it too so perhaps you were just struggling with your boards topology since 3200 is insanely low for that voltage you're giving.

In response to the other person, yes 1.2v on both seems pretty inline for 4000. You can go all the way to 1.35v on both for 24/7 if you so needed, but shouldn't need to unless you're trying like 4400+.

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post #5 of 9 (permalink) Old 11-29-2019, 01:39 PM - Thread Starter
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Quote: Originally Posted by ComansoRowlett View Post
Coffee lake IMC's (at least for 9900K/KF/KS) are pretty strong usually. My 9900k's IMC is actually pretty bottom of the barrel compared to others but I can still do 4000 quite easy with 1.15v VCCSA/IO on a kit of b-die. Board also has a big say in it too so perhaps you were just struggling with your boards topology since 3200 is insanely low for that voltage you're giving.

In response to the other person, yes 1.2v on both seems pretty inline for 4000. You can go all the way to 1.35v on both for 24/7 if you so needed, but shouldn't need to unless you're trying like 4400+.
Thank you for this. I'll keep testing to make sure there's no errors.

Specs: Asus Maximus XI Extreme eATX, i9 9900KS, Aorus Xtreme 2080 Ti, G.Skill Trident Z Royal DDR4-4000 4x8, 970 Pro 1Tb
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post #6 of 9 (permalink) Old 11-29-2019, 11:52 PM
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Quote: Originally Posted by ComansoRowlett View Post
Coffee lake IMC's (at least for 9900K/KF/KS) are pretty strong usually. My 9900k's IMC is actually pretty bottom of the barrel compared to others but I can still do 4000 quite easy with 1.15v VCCSA/IO on a kit of b-die. Board also has a big say in it too so perhaps you were just struggling with your boards topology since 3200 is insanely low for that voltage you're giving.

In response to the other person, yes 1.2v on both seems pretty inline for 4000. You can go all the way to 1.35v on both for 24/7 if you so needed, but shouldn't need to unless you're trying like 4400+.
I forgot to mention I'm using 4 sticks of 4 GiB Corsair Vengeance that's only rated to 2800Mhz.
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post #7 of 9 (permalink) Old 12-01-2019, 02:48 AM
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Quote: Originally Posted by 8051 View Post
I forgot to mention I'm using 4 sticks of 4 GiB Corsair Vengeance that's only rated to 2800Mhz.
Still that is pretty low speed for that IMC voltage, only way I could see it being that bad is if you're using 4 dimms on a daisy chain board or the board just has trash memory shielding/traces.

CPU
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Motherboard
MSI X570 ACE
GPU
2080Ti FE (Buildzoid edition + waterblock)
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Hard Drive
Samsung 860 EVO
Power Supply
Leadex Superflower 1000W platinum
Cooling
Corsair H150i Pro
Cooling
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Case
Phanteks Enthoo Evolv
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ASUS MG28U
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Samsung 970 pro 1TB
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post #8 of 9 (permalink) Old 12-07-2019, 03:12 PM
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9900k + auros master + F4-4000C17Q-32GTZR @ XMP

In my case it seems that lowering SA\IO to 1.17\ 1.15 actually stabilized, then being at 1.2 for both. Still needs more testing...

All tests I throw at it work, but Apex is another story. Would constantly get the dxgi_device_hung and thought it was the gpu, nope... Returned to defaults + xmp and now I can do 2-3h without issues, before it would crash within 30min...

Edit: it now seems that 4133 17-17-17-37 @ 1.4v to be stable at the same io\sa

Oh and your instability (restart in realbench) has nothing to do with io\sa, it's your core voltage, run linpack or linx to confirm (beware this is worse than p95 smallest ftt)

Edit: setting the io\sa to 1.1\1.15 resulted in a restart on linx, my current sweet spot looks to be 1.15 on both, will see if it holds up...

Last edited by AndrejB; 12-08-2019 at 03:36 PM.
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post #9 of 9 (permalink) Old 12-19-2019, 10:05 PM
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Last edited by AndrejB; 12-24-2019 at 09:28 PM.
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