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[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

CaseySJ

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@CaseySJ could the "ReleaseUSBownership" thing of OC may be useful in this case?
It’s certainly worth trying. However for @qthegaijin the problem was a total shutdown of USB ports, which was solved by enabling this checkbox.
 
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Will read that section of the OC manual soon, but meanwhile do they provide any information about the possibility of correcting IOMMU configuration?
Question: how we consider if IOMMU is "misconfigured in the firmware" or not, and how we can check that "configuration" ... ?
 
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@CaseySJ
Note that DisableIoMapper's Note 2 is something new in 0.7.1, it is not present in any previous OC version configuration.pdf
 
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Just to be clear, is your memory natively spec’d at 3000MHz, but you’ve disabled XMP and down-clocked it to 2666MHz?
I'm embarrassed to say I can't tell whether it's native or not :angel: It's Corsair CMK32GX4M2B3000C15. I'm guessing not native since it defaults to 2133 without XMP.

Edit: Checked the link @Inqnuam shared, it's 2133 native and verified supported for all four slots.
 

UtterDisbelief

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I'm embarrassed to say I can't tell whether it's native or not :angel: It's Corsair CMK32GX4M2B3000C15. I'm guessing not native since it defaults to 2133 without XMP.

Edit: Checked the link @Inqnuam shared, it's 2133 native and verified supported for all four slots.

Your memory is 3000MHz.

All memory above 2133 in BIOS is classed as overclocked, so that's the default. Above that, yes, your memory is fine although unwanted ejecting USB devices on wake-from-sleep may occur.
 
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Your memory is 3000MHz.

All memory above 2133 in BIOS is classed as overclocked, so that's the default. Above that, yes, your memory is fine although unwanted ejecting USB devices on wake-from-sleep may occur.
Thanks! So confusing with this in the compatibility list:

Skärmavbild 2021-06-27 kl. 13.46.31.png
 
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Interesting. What is the make/model of your 8GB DIMM, and its native speed?

I tried various combinations of 16GB DIMMs on my Z490 Vision D that is also running stock F5, but side effects disappear when only one 16GB module is installed. Haven’t tried 8GB modules exclusively on that system yet.
On my z490 box, I’m using 32 GB of Corsair vengeance rgb memory @ 3200 MHz. 8 GB DIMMs.
 
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Wow! So a Z390 Designare with 64GB of native 2666MHz memory has no side effects with AppleVTD!
  • Is XMP Profile 1 disabled?
  • Which version of BIOS is installed?
Will add your name and to “Experiment Update #3”.

Does anyone else have native 2666MHz memory??
Yes, I have 128GB of 2666MHz but haven't done any experimentation with the test BIOS.
 
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