*Official* Intel DDR4 24/7 Memory Stability Thread - Page 1045 - Overclock.net - An Overclocking Community

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post #10441 of 10693 (permalink) Old 11-10-2019, 07:15 AM
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4133 no changes.
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Asus Z390 Maximus XI Extreme.
Asus Z390 Maximus XI Apex.
Asus Z390 Maximus XI Hero.
Intel I9 9900K. C Stepping P0 revision.
Intel I9 9900K. (new) D Stepping R0 revision.
Custom Watercooling.

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post #10442 of 10693 (permalink) Old 11-10-2019, 07:46 AM
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Anyone tried the 9900KS IMC ? Is the 9900K with R0 stepping the strongest so far regarding z390 ?

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post #10443 of 10693 (permalink) Old 11-10-2019, 07:55 AM
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Quote: Originally Posted by Carillo View Post
Anyone tried the 9900KS IMC ? Is the 9900K with R0 stepping the strongest so far regarding z390 ?

Jon
I have both C stepping P0 Revision and D stepping R0 Revision 9900K's, the D stepping R0 revision is what the 9900KS is. My 9900K D/R0 seems to have a slightly better IMC and requires slightly less voltages for the same frequencies.
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Asus Z390 Maximus XI Extreme.
Asus Z390 Maximus XI Apex.
Asus Z390 Maximus XI Hero.
Intel I9 9900K. C Stepping P0 revision.
Intel I9 9900K. (new) D Stepping R0 revision.
Custom Watercooling.
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post #10444 of 10693 (permalink) Old 11-10-2019, 08:03 AM
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Quote: Originally Posted by moorhen2 View Post
I have both C stepping P0 Revision and D stepping R0 Revision 9900K's, the D stepping R0 revision is what the 9900KS is. My 9900K D/R0 seems to have a slightly better IMC and requires slightly less voltages for the same frequencies.
So your 9900k D/R0 has a better IMC than the 9900ks ? I have a maximus gene with g.skill 3600 c15 and a 9600k with pretty weak IMC, and im wondering if i should go for 9900k or 9900KS. The IMC is more important to me than having the best binned cores. But i guess there is no guaranty to get a 9900k D/RO chip ?
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post #10445 of 10693 (permalink) Old 11-10-2019, 08:19 AM
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Quote: Originally Posted by Carillo View Post
So your 9900k D/R0 has a better IMC than the 9900ks ? I have a maximus gene with g.skill 3600 c15 and a 9600k with pretty weak IMC, and im wondering if i should go for 9900k or 9900KS. The IMC is more important to me than having the best binned cores. But i guess there is no guaranty to get a 9900k D/RO chip ?
I wouldn't know about the IMC on a 9900KS's, that would be chip dependant, I am just saying the new KS's have the same stepping and revision as my new 9900K.

Asus Z390 Maximus XI Extreme.
Asus Z390 Maximus XI Apex.
Asus Z390 Maximus XI Hero.
Intel I9 9900K. C Stepping P0 revision.
Intel I9 9900K. (new) D Stepping R0 revision.
Custom Watercooling.
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post #10446 of 10693 (permalink) Old 11-10-2019, 11:07 AM
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There is zero guarantees on IMC quality. As I said before any 9900K can run 5Ghz core and any 9900K(s) can run any memory clock theoretically but the voltages needed can be so high that they aren't useful / runnable.

My 9900K C P0 has great OC potential for the cores doing 5.1Ghz 4.8Ghz cache at well under 1.3v (1.25 to 1.28v depending on load and LLC level). It gets hot but if temps are controlled it can go way higher. It benches all cores HT on 5.5Ghz pretty easily just can't be realistically cooled at that point.

IMC however is pretty weak. Doesn't boot above 4800 at any voltage / timing, can only max out at 4400-4500 stable with insane IO/SA voltages (1.4v+) and needs 1.30v SA 1.25v IO to stabilize 4200 CL16. So yeah.

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post #10447 of 10693 (permalink) Old 11-10-2019, 11:27 AM
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Quote: Originally Posted by Imprezzion View Post
There is zero guarantees on IMC quality. As I said before any 9900K can run 5Ghz core and any 9900K(s) can run any memory clock theoretically but the voltages needed can be so high that they aren't useful / runnable.

My 9900K C P0 has great OC potential for the cores doing 5.1Ghz 4.8Ghz cache at well under 1.3v (1.25 to 1.28v depending on load and LLC level). It gets hot but if temps are controlled it can go way higher. It benches all cores HT on 5.5Ghz pretty easily just can't be realistically cooled at that point.

IMC however is pretty weak. Doesn't boot above 4800 at any voltage / timing, can only max out at 4400-4500 stable with insane IO/SA voltages (1.4v+) and needs 1.30v SA 1.25v IO to stabilize 4200 CL16. So yeah.
if booting 4800 is considered a weak IMC, mine is trash. No matter what IO/SA voltage i use, i can not boot higher than 4533mhz. And i have a Maximus Gene motherboard. I do of course understand there is no guaranty for anything, but what im asking is people experience so far. So thanks for sharing. How many of you can actually boot 5000mhz ? if you can, please share a screenshot I was also thinking to swap out the old 3600c15's for maby G.Skill Royal's 3200c14 or the Hyper X 4266c19 kit shown above here. What do you think ?
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post #10448 of 10693 (permalink) Old 11-10-2019, 12:18 PM
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Quote: Originally Posted by Apothysis View Post
Well the kit shouldn't be relevant in this scenario as I firmly believe the issue lies in the motherboard and how it trains. I've tested two different kits, 4000 CL19 and 3600 CL16 (G.Skill). I'm currently running G.Skill F4-360016D-32GTZN. Mem OK is disabled, MRC Fast Boot also disabled (to ensure training). I did also state that I already confirmed GSAT stability (which, as I've understood it, primarily tests the stability of dram voltage and timings). The issue lies in VCCIO and training (Karhu and Prime95 112k in-place non-avx both test this and confirm instability in my case, due to bad training). I'm sure the XI Apex does exceptionally well with 2x8GB sticks but dual rank is very, very different. There's a lot of stuff the motherboard does on auto-training that has to be manually tweaked to get it to post properly at high frequencies (generally setting things to tight).



It looks weird sure but it's not uncommon for B-die and there's no issue with it - I've seen plenty similar cases, like I said all the timings in the picture are 1 hour GSAT stable. The same issue persists even with 18-18-18-40 and very safe, stable secondary timings. 4000MHz is very, very demanding even with a really good IMC and motherboard. Buildzoid has a video of him overclocking a pair of 16GB Corsair Dominator sticks where he mentions only one of his motherboards actually capable of pushing it above 3866, an MSI ITX board that just handles training well.


The kit I have is capable of a lot tighter timings than what the pictures show but set most things a lot safer just to find VCCIO stability first, hoping that'd alleviate any difficulty training.
You found out about 112K in place FFT test from me?

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post #10449 of 10693 (permalink) Old 11-10-2019, 04:11 PM
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I went from [email protected] at 1.43v DRAM and 1.15v IO/SA (set in BIOS) unstable ONLY in HCI MemTest and not in MemTest86 to 1.45v DRAM and 1.25v IO/SA (set in BIOS, real voltage between 1.26~1.28v for both) and now I'm stable in HCI MemTest and will run tonight the MemTest86 to check if I will be stable too. From 1.15v IO/SA to 1.25v, huge jump and just 0.02v more in DRAM, I don't know if I have the patience to try these two tests again at lower IO/SA voltage, probably will just leave like this.

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post #10450 of 10693 (permalink) Old 11-10-2019, 04:37 PM
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Quote: Originally Posted by Carillo View Post
if booting 4800 is considered a weak IMC, mine is trash. No matter what IO/SA voltage i use, i can not boot higher than 4533mhz. And i have a Maximus Gene motherboard. I do of course understand there is no guaranty for anything, but what im asking is people experience so far. So thanks for sharing. How many of you can actually boot 5000mhz ? if you can, please share a screenshot I was also thinking to swap out the old 3600c15's for maby G.Skill Royal's 3200c14 or the Hyper X 4266c19 kit shown above here. What do you think ?
I have a couple of sets of G.Skill F4-4400C19-8GTZKK and a Gene and I'm getting a 9900ks later this week.
Not sure if the ram is any good or not but I will keep you posted of the results. Hoping for over 5MHz
I haven't tried a Z390 9900k setup before so I will look around for some idea of:
dram voltage
vccio
vccsa
cache frequency
vcore

Not looking to fry anything but don't mind pushing it for a screen shot

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