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Z370 Killer/ac - XMP issues also?
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steveg View Drop Down
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    Posted: 09 Mar 2018 at 11:04am
I am curious what experiences others here have had with this board.

I have an I5-8400 (yes, no overclocking)
Corsair Vengeance LPX 8GB 4000MHz
GTX 1060 6GB


II bought this memory after buying the MB because it was listed in the MB QVL list.
However, I have yet to get it to even breach 2133 (1067MHz x 2).

I can set it to XMP and choose auto, 4000, 3800, 3200 and while the system boots, the MB is reverting it to 2133 (verified using cpuz, Task manager, HWInfo).
DRAM voltage appears to be working and uses the XMP of 1.35 . I have also tried manually setting VCCIO at various levels from .97-1.1, VCCSA from 1.07-1.1 experimenting and either it did not boot or it came up at 2133 anyway.

Also have tried bios 1, 1.1, 1.2,  (have not done 1.5 yet as I am waiting until I am finished, since that seems to have only updated for M/Spectre thing.

Anyone else have any experience with this board> From reading here it sounds like ASRock is having trouble with memory voltage bios settings and I am wondering if the same issues are happening with other boards.



Edited by steveg - 09 Mar 2018 at 11:09am
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steveg View Drop Down
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nobody else experience similar (or have better results) with this board?

I have tried some more but it always just seems to reset back to 2133 no matter what I set. 

BIOS 1.5 (latest) does not help.


Edited by steveg - 20 Mar 2018 at 2:11pm
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wardog View Drop Down
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What is the Kit part number of the mem?
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CMK8GX4M2B4000C19R

The end R is for red. It is on the QVR kist which is why I bought it.
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abitcloudy View Drop Down
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Originally posted by steveg steveg wrote:

CMK8GX4M2B4000C19R

The end R is for red. It is on the QVR kit which is why I bought it.

My RAM is CMK16GX4M2B3000C15 and freezes constantly with win10 and i5 8600K across all BIOS versions.   Difference is I have Z370 extreme4 MB. There's no rhyme or reason as to when it may lock from what I can tell.  I've tried the voltage adjustments mentioned in other threads as well, disabling intel virtualization extensions/secure boot etc, no joy.
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wardog View Drop Down
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Originally posted by steveg steveg wrote:

CMK8GX4M2B4000C19R

The end R is for red. It is on the QVR kist which is why I bought it.


Steve, I apologize for not getting back to you sooner.

Your mem.

Go to http://www.softnology.biz/files.html and install the Freeware ver of Thaiphoon Burner. Once installed start it and select "Read' there in the middle top. Select a bank that has a stick in it.

Full screen it so that all data is shown in the app. Then at the bottom click on Screenshot, upload that to an image hoster and paste the link here please.

.

Too, try setting them up with/by/using their XMP Profile, BUT, change the mem speed to 2666, Save and Reboot. Any change or still revert to 2133?
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Originally posted by abitcloudy abitcloudy wrote:

My RAM is CMK16GX4M2B3000C15 and freezes constantly with win10 and i5 8600K across all BIOS versions.   Difference is I have Z370 extreme4 MB. There's no rhyme or reason as to when it may lock from what I can tell.  I've tried the voltage adjustments mentioned in other threads as well, disabling intel virtualization extensions/secure boot etc, no joy.


abc, post a pic of/with the stickers of both sticks of your mem Kit please. Readable.
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Also.

Both of you.

You DO have the sticks in slots A2 and B2, right?

If not, change them, clear the BIOS and post back. Clear the BIOS after, this is important. Whenever you move mem in and out or swap ALWAYS clear the BIOS. Even if moving the same sticks in and out.
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Thanks for your help.

Mem is in slot 2 & 4 (A2 and B2)

Interestingly following your advice I was able to hit 2666. Then I tried 2800 and it worked as well. Anything above 2800 fails or reverts to 2133. Voltages were on auto.

I am wondering if the issue is with the voltages. At 2800 it looks like they may be maxed out.
They are: 
VCCIO 1.144
VCCSA 1.216
VCCST 1.152

I tried to bump them up manually just a touch (to attempt 2933 or 3200 that way) but I would increasing would hit red and revert to near these. The MB did not seem to want me to go any higher.

I tried manually setting
VCCIO 1.140
VCCSA 1.200 (highest manual it would do)
VCCST 1.150 (highest manual it would do)

But 2933 or higher would not boot.

Thaiphoon screenshot:



Edited by wardog - 24 Mar 2018 at 4:05pm
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Originally posted by steveg steveg wrote:

Thanks for your help.

Interestingly following your advice I was able to hit 2666. Then I tried 2800 and it worked as well. Anything above 2800 fails or reverts to 2133. Voltages were on auto.


Thanks for the confirmation at 2666.

Hmmmm.......... where to begin here with you................


For starters, I'm an AND FanBoy Wink , so Intel is at times foreign to me. I google too much when here on the Intel side of the forum. That's good, and at the same time, not so.

This time it appears it's good. A few hours practicing my Google Fu here on this turned up a nugget.

Intel i5-8400 CPU Review: 2666MHz & 3200MHz Gaming Benchmarks:
https://www.gamersnexus.net/hwreviews/3086-intel-i5-8400-cpu-review-2666mhz-vs-3200mhz-gaming

And yes. Those v's are steep for the gain. No sense shortening this processors life-span running it at those v's 24/7 daily.

Back to mem, which I know like I was born with 4 sticks in my mouth.

The link above. Not much diff at all between 2666 and 3200 on a locked 8400. Some, yet not a whole lot.

Here's what I'd do here knowing that. Grab AIDA64 and find the sweet spot between voltages and timings. Seeing how low you can get the timings at 2666. That 4000 kit you have uses Samsung e-die IC's which will offer up quite the plethora of options timing wise at 2666. Don't get your head wrapped around a low CAS/CL either. High speed mem behaves very differently when lowering the Mhz than say 2800 mem being OC'd to 3200/3600.

My Sig. That 4133 is Samsung b-die IC's. I can make it pump out comparable latencies using different CL's and if you were to look at the only the resultant generated numbers you wouldn't know that they were using different CL's.

But I wouldn't be comfortable running a VCCIO at that stated 24/7. By the slight gains @ 3200 plotted in graphs of the article above? Nope. No way.


Keep me posted on your progress.




EDIT: that > than






Edited by wardog - 25 Mar 2018 at 5:43am
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