Exclusive thread for i9 9900k lottery losers :-) - Page 32 - Overclock.net - An Overclocking Community

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Exclusive thread for i9 9900k lottery losers :-)

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post #311 of 317 (permalink) Old 07-09-2020, 04:13 PM
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Quote: Originally Posted by enthusiastdre View Post
Ugh my brand-new 9900k needs 1.325V @ 4.9GHz (with -50% LLC on an EVGA Z370 Classified K + NZXT X62 280mm AIO) just to complete a single CB15 run. This isn't even CB20 or anything more intensive. It requires 1.4V to hit 5.0GHz.

I haven't read through all the thread pages here, but this has got to be one of the worst performing 9900k's out there. Of course, Newegg doesn't permit returns for opened items. Super disappointing, especially considering that a good portion of the previous posts on this thread seem be along the lines of "I needed 1.35V to hit 5.1GHz... terrible!"

voltage + llc you might be at high voltage cause your llc is incorrect these chips need deliding at 5.0 to become slightly efficient , start with llc to see what your cooling limitation really are

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post #312 of 317 (permalink) Old 07-09-2020, 04:14 PM
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Quote: Originally Posted by enthusiastdre View Post
Ugh my brand-new 9900k needs 1.325V @ 4.9GHz (with -50% LLC on an EVGA Z370 Classified K + NZXT X62 280mm AIO) just to complete a single CB15 run. This isn't even CB20 or anything more intensive. It requires 1.4V to hit 5.0GHz.

I haven't read through all the thread pages here, but this has got to be one of the worst performing 9900k's out there. Of course, Newegg doesn't permit returns for opened items. Super disappointing, especially considering that a good portion of the previous posts on this thread seem be along the lines of "I needed 1.35V to hit 5.1GHz... terrible!"
Oh there have been worse chips. Seen some needing 1.35v load for 4.9 ghz (Load voltage/VR VOUT, not bios, so that's still worse than your chip as Z370 classified doesn't have die-sense, and I assume your 1.325v is bios set, -50% LLC is 0.8 mOhms of loadline, which makes it an 'average' 4.9 ghz sample according to silicon lottery binning statistics.

If you had been reading posts the last 6 months, the # of CPU's that could not reach 5 ghz on reasonable voltages skyrocketed after 9900KS binning happened, and even though that binning is now over, quality of 9900k samples in the wild is still hit and miss.

When 9900KS binning was alive and well, only about 23% of 9900k chips were hitting 5 ghz at reasonable voltages, so yes, you unfortunately lost the lottery Sorry.
The only guaranteed way to get a good chip now is to buy someone's binned pre-tested chip (e.g. with temps, frequency, load "VR VOUT" or "die-sense" voltages shown during 5.0 and 5.1 ghz stress tests, HWinfo64 "WHEA" section shown, and with time/date stamps for validation). There should still be a decent number of people selling chips in classified or hardware swap, but you would have to ask for that binning verification.
But you would have a hell of a time selling a bad sample 9900k at this point in time.

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Quote: Originally Posted by sakete View Post
Well, I want you to know I have an academic degree in speculation.

Last edited by Falkentyne; 07-09-2020 at 04:21 PM.
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post #313 of 317 (permalink) Old 07-09-2020, 04:37 PM
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Just seen this thread, my i9 9900k is a lemon, I need i would say 1.35v to hit 5.0ghz stable,

1.3v instant crash in prime
1.32v I get errors
1.34v it's ok but I don't trust it
1.35v it's ok but I still don't trust it
1.36v is what I use every day..
Llc Turbo.

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post #314 of 317 (permalink) Old 07-09-2020, 05:05 PM
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Quote: Originally Posted by Falkentyne View Post
Oh there have been worse chips. Seen some needing 1.35v load for 4.9 ghz (Load voltage/VR VOUT, not bios, so that's still worse than your chip as Z370 classified doesn't have die-sense, and I assume your 1.325v is bios set, -50% LLC is 0.8 mOhms of loadline, which makes it an 'average' 4.9 ghz sample according to silicon lottery binning statistics.

If you had been reading posts the last 6 months, the # of CPU's that could not reach 5 ghz on reasonable voltages skyrocketed after 9900KS binning happened, and even though that binning is now over, quality of 9900k samples in the wild is still hit and miss.

When 9900KS binning was alive and well, only about 23% of 9900k chips were hitting 5 ghz at reasonable voltages, so yes, you unfortunately lost the lottery Sorry.
The only guaranteed way to get a good chip now is to buy someone's binned pre-tested chip (e.g. with temps, frequency, load "VR VOUT" or "die-sense" voltages shown during 5.0 and 5.1 ghz stress tests, HWinfo64 "WHEA" section shown, and with time/date stamps for validation). There should still be a decent number of people selling chips in classified or hardware swap, but you would have to ask for that binning verification.
But you would have a hell of a time selling a bad sample 9900k at this point in time.
Thanks for the awesome reply! I've been on AMD since Zen 1, so I'm used to losing the silicon lottery. Though I must say, my last couple Zen 2 and Zen+ chips turned out to be decent. I'm trying to play catch-up since this is my first Intel platform since Haswell, so I'm pretty out-of-the-loop when it comes to overclocking Skylake-based chips in general. I was aware that the 9900KS binning consumed a good portion of the top performing chips, and indeed, my 9900K is a R0-stepping so this all makes sense now. But I suppose you made me feel a little better now that I know this chip isn't quite as bad as I initially thought, relatively speaking.

Other than 4.9GHz @ 1.325V Vcore and my tuned memory, I've left everything else at stock. According to Tweaktown's review, the Z370 Classified K has a pretty decent VRM with the IR35201. But at stock settings, the Vdroop seems to be pretty huge. At stock, I'm seeing the "VR VOUT" reading drop a full 1V at load (I'm assuming that's the most reliable voltage reading for this board using HWInfo). I have another board using a similar VRM configuration (the MSI X470 Gaming Pro Carbon), and I don't recall it's Vdroop being anywhere near as severe.  

Edit2: Actually, I seem to be stable at 4.9GHz @ 1.325V with default LLC. VR VOUT drops to 1.225V and cores max out at 82C. Not sure how much more headroom I have in terms of temperatures or voltage at this point.

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Last edited by enthusiastdre; 07-12-2020 at 03:39 PM.
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post #315 of 317 (permalink) Old 07-20-2020, 01:35 PM
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I got a 9900K (February 2020 batch) not long ago and 4.9 is all I can manage with a 280mm AIO and needing ~1.35v load voltage for no correctable errors. Memory tops out at 4300. I have the TjMax set at 115 and the cores get above 100 in stress tests. Runs plenty cool while gaming and I'll just load a different profile in the BIOS with lower clocks for when I do encoding batches.

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post #316 of 317 (permalink) Old 08-14-2020, 01:32 PM
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Paid the MC premium (about $600 after tax but way better than SL though) for mine at launch to replace 8700K, but glad I did seeing how the tail end of 9900K's are looking based on these reports. Just recently finished stability testing mine at 5.2GHz 0AVX offset at 1.336v. Had been running daily 5GHz at 1.224v with 0AVX offset and had 5.1GHz semi stable while using paste. When I rebuilt my loop a week ago, I swapped it out to liquid metal and the extra temperature headroom seems to have helped a lot.

Stressed with Realbench 2.56 and multiple loops of GCC and linux kernel builds.

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post #317 of 317 (permalink) Old 08-14-2020, 01:56 PM
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I was messing around on eBay and "accidentally" won a used (open box? It was way too clean to have ever actually been used lol) 9900k for about $370. I was intending to buy one so not really an "accident", but at that price I was really expecting to be outbid last second lol. Was able to get it to 5.1 core 4.7 uncore at around 1.35v 0 AVX offset (tested Prime95 AVX disabled and hours of Witcher 3). Not sure if dud or not? Seems to be pretty average I guess.

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