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How to extend the iMac Pro to X99 [Successful Build/Extended Guide]

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kgp

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Actually, my Haswell-E still boosts to its overclocked speed just fine at 4300. The issue is that PMDrvr.kext is unstable for the system. When I enable EIST and use PMDrvr.kext, I get the best geekbench scores as I believe that enables the cores to throttle up and down far more responsively to load. However it causes the system to crash under load in Adobe CC 2018, especially Premiere Pro and After Effects. This is despite its stability in Prime95. My guess is that the voltage movement isn't as responsive at sometimes the CPU gets caught in a moment of high speed but unsuitably low voltage that then causes it to hang. This behavior occurs even at stock speeds, so I believe my conjecture is likely right. Without PMDrvr and EIST, my geekbench scores are significantly lower. So I'd rather force it to run full throttle all the time to get the desired score and performance. The chip is sufficiently cooled, so there are no concerns there. Please PM me if you have a solution that you don't wish to publish publicly.

Did you try to increase the AVX offsets in BIOS?
 
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There's no AVX offset settings in BIOS. My board is the Rampage V Extreme.
 

kgp

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There's no AVX offset settings in BIOS. My board is the Rampage V Extreme.

There should be.. did you watch carefully?
 
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I assure you, this avx offset thing came after Skylake.
 
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To be clear, I believe you're thinking of your X299 setup that has AVX offset. X99 does not have that feature. AVX offset came around during Z170 days with Skylake, adaptive voltage overclocking, and AVX offset. Please kgp or anyone else, how do I eliminate all other states save for the full throttle state?
 

kgp

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I assure you, this avx offset thing came after Skylake.

To be clear, I believe you're thinking of your X299 setup that has AVX offset. X99 does not have that feature. AVX offset came around during Z170 days with Skylake, adaptive voltage overclocking, and AVX offset. Please kgp or anyone else, how do I eliminate all other states save for the full throttle state?

You are totally wrong!

See Bios 1801 ASUS X99-A II:

IMG_0340.png


Start with an AVX offset of 3 and increase stepwise by 1, until your system is stable.

Good luck,

KGP
 
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That setting is not available in Rampage V Extreme. Absolutely certain. I'm an experienced overclocker. It's not in RVE.
 

kgp

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That setting is not available in Rampage V Extreme. Absolutely certain. I'm an experienced overclocker. It's not in RVE.

Do you use the most recent BIOS? In any case, that the AVX offset has been introduced after skylake is simply wrong, as clearly demostrated above.
 
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Latest bios. And I'm not wrong. X99-A II is part of the X99 refresh when Broadwell-E came out, and that's in the post-skylake era.
 

kgp

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Latest bios. And I'm not wrong. X99-A II is part of the X99 refresh when Broadwell-E came out, and that's in the post-skylake era.

Whatever... in any case there is a AVX offset setting in the ASUS X99-A II BIOS, which might be crucial with respect to your software issue.
 
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