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Skylake X Phantom Throttling - Page 3

post #21 of 29
Quote:
Originally Posted by OZrevhead View Post

Has anyone collected any data on this for MSI motherboards? I'm having a weird issue with my 7820x and Gaming Pro Carbon. It seems to score well and increase linearly with clocks in xtu, cinebench and firestrike but my time spy and 3d11 physics are down (10800 and 16000 respectively). I haven't tested all clocks in these, just in fire strike, so maybe I need to do this to see if it plateaus. My stable daily clock is 4700 1.22v, 3000 cache and 4000-16-16-16-28 1T on the rams at 1.45v.

Any help would be great
Quote:
Originally Posted by Mysticial View Post

By now, it's pretty clear that the phantom throttling in particular is caused by the vdroop in the VCCIN. So on all motherboards, the fix is to either increase VCCIN so it stays above 1.75v at all times or to enable the right LLC to compensate for it.

But as you've noticed, there's a lot of other types of (non-phantom) throttling as well. (I count 17 of them in Intel's technical docs.) But getting around those is unfortunately motherboard-specific since each mobo/BIOS gives slightly different names to all the various throttling limits.

Well ive been running AVX prime95 for the past 4 hours and my VCCIN is reading 1.808v. Maybe this means this MSI board isn't suffering the same issue?

I don't notice any drop in temps or power consumption anyway.
Edited by The_Rocker - 9/14/17 at 12:00am
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post #22 of 29
I've noticed the "Vccin tracker" setting in the new Asus bios really works. No change in ycruncher bbp time with vccin 1.8v and LLC1 (lowest). At this setting vccin droops to 1.6v at load. rolleyes.gif
post #23 of 29
I did everything suggested in the thread, yet my phantom throttling still remains. x264 stress test causes my 4500mhz overclock to go down as much as 4200mhz on random cores.

I tried with VRIN as high as 1.95 still no go.

7900x and gigabyte aorus gaming 9.
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post #24 of 29
Thread Starter 
Quote:
Originally Posted by Nautilus View Post

I did everything suggested in the thread, yet my phantom throttling still remains. x264 stress test causes my 4500mhz overclock to go down as much as 4200mhz on random cores.

I tried with VRIN as high as 1.95 still no go.

7900x and gigabyte aorus gaming 9.

Since you can see the clock drop, it's not the phantom throttling. You're throttling for other reasons. Are you hitting Tj.Max?

HWInfo64 will be able to catch most throttling reasons. But it doesn't detect phantom throttling itself. So you can try using that to see what you're throttling on.
post #25 of 29
Quote:
Originally Posted by Mysticial View Post

Since you can see the clock drop, it's not the phantom throttling. You're throttling for other reasons. Are you hitting Tj.Max?

HWInfo64 will be able to catch most throttling reasons. But it doesn't detect phantom throttling itself. So you can try using that to see what you're throttling on.



Thank you. I think I found it. Says: Max Turbo Limit. Uhmm but it doesn't make any sense because i disabled all the Turbo.
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post #26 of 29
Help I'm literally having the same problem as this guy above me... Everything was just fine for me for a while I had my 7900x @ 4.7 1.275v and it was all great and suddenly today all of my scores took a poop and I look in hwinfo and I see that? I have no clue what to do... My mobo is the Asus X299 deluxe and I have a custom loop with two 360 rads and there is zero thermal issues. Delidded CPU and my temps never went above 75. I've looked everywhere and cannot find a thing so any help would be GREATLY appreciated! Thank you!
post #27 of 29
Thread Starter 
Quote:
Originally Posted by Bootsyyy View Post

Help I'm literally having the same problem as this guy above me... Everything was just fine for me for a while I had my 7900x @ 4.7 1.275v and it was all great and suddenly today all of my scores took a poop and I look in hwinfo and I see that? I have no clue what to do... My mobo is the Asus X299 deluxe and I have a custom loop with two 360 rads and there is zero thermal issues. Delidded CPU and my temps never went above 75. I've looked everywhere and cannot find a thing so any help would be GREATLY appreciated! Thank you!

Back off to 4.0 GHz and re-run your benchmarks to make sure they are good. Then slowly work your way back up to 4.7 GHz. What happens then?
Edited by Mysticial - 11/7/17 at 6:33pm
post #28 of 29
Hi,
I haven't noticed any throttling since after delidding my 7900x :/
I've benched just about everything at this clock never a bsod.... so it seems pretty stable
If it weren't realbench would crash and it doesn't
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post #29 of 29
Im not sure, but should avoid or loosen this limits?

https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-scalable-datasheet-vol-1.pdf#G3.1045466
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/6th-gen-x-series-datasheet-vol-1.pdf#G6.1041963
TDP140W CPUs, VCCIN ICCMAX 190A, Pmax Package 297W, VCCIN VID Rang Min 1.60V
TDP165W CPUs, VCCIN ICCMAX 228A, Pmax Package 363W, VCCIN VID Rang Min 1.60V

300W/1.60V=187A, this is very close.
300W/1.80V=166A
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