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What to do about this memtest86+ memory error?

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post #1 of 41 (permalink) Old 12-13-2018, 03:29 PM - Thread Starter
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What to do about this memtest86+ memory error?

I have G.SKILL TridentZ Series 32GB (4 x 8GB) memory rated for 3733MHz with timings of 17-17-17-37 at 1.35V. It's running on an ASRock Taichi Z390 board with an Intel 9700k overclocked to 5.1GHz.

I've been running it for a few weeks and it's stable under Prime95/Blend mode for hours.

In preparation to see if I could OC the memory higher, I thought I'd thoroughly test it out and then establish a few performance benchmarks, then tweak some secondary timings to see if I could improve things. So, as part of testing it, I put memtest86+ on a DVD, booted from that DVD and ran memtest86+ for awhile. In fairly short order, sometimes on the first pass, sometimes not until the third pass, I'd get a few memory errors like this:



Not that it particularly matters, but the errors are nearly always on Test #7.

If I drop the memory speed down to 3333MHz, there are no errors on memtest86+ when run for hours. I tried removing the processor OC so it was running only at the stock speed and the memory still won't run at the rated 3733MHz without memteset86+ errors. The errors are not always the same memory address. Sometimes nothing shows up until the third pass, sometimes it shows up quickly on the first pass. I've tried increasing the DRAM Voltage from the XMP value of 1.35 up to 1.39. No change.

I tried raising the timings from 17-17-17-37 to 18-18-18-38 and it won't POST. At 18-18-18-37 it will POST (which seemed strange to me), but still exhibits similar errors under memtest86+.

So, I'm trying to figure out what next step make sense?
  1. Return the DRAM immediately and buy something different?
  2. Contact G.Skill with documentation of the issues to see what they say
  3. Seek advice on appropriate timing/voltage adjustments that might get rid of the errors
  4. Upgrade to new BIOS for my Z390 motherboard that just came out today and start a bunch of the testing over with the new BIOS
  5. Something else you might recommend

FYI, the QVL for these particular memory sticks on G.SKill's site lists this specific motherboard so someone believes they are compatible.

I've read everything I can get my hands on about memory overclocking, but this is my first attempt. I was planning on just starting with the XMP setting and once that proved stable, then fiddle some more after that, but I'm finding that even the XMP setting isn't stable.

Thoughts on what I should do next?

Here are my detailed timings:

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post #2 of 41 (permalink) Old 12-13-2018, 03:49 PM
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I recommend number 2. Contact manufacturer and see what they say. They have a limited lifetime warranty on RAM. You might want to test each stick individually even though they are a matched set. Good luck...

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post #3 of 41 (permalink) Old 12-13-2018, 03:54 PM
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You should test with the CPU not being overclocked. I once sent a memory kit back because I thought it wasn't stable, but later found out that what really wasn't stable was my CPU overclock. I also had things running fine with lower memory clocks but saw error with higher memory clocks, but ultimately it was not enough Vcore on the CPU and not the memory's fault.

Do you see WHEA warnings being logged in the Windows Event Viewer?
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post #4 of 41 (permalink) Old 12-13-2018, 04:14 PM
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Hi,
Might just try with two sticks in
If it passes try the other two sticks
If they pass it's just the board doesn't like running with all four sticks in there that high.

CPU
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Titan Xp with copper Water Block
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Trident Z 3600C16 4x8gb's b-die default timings 16-16-16-36
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post #5 of 41 (permalink) Old 12-13-2018, 04:21 PM - Thread Starter
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Quote: Originally Posted by deepor View Post
You should test with the CPU not being overclocked. I once sent a memory kit back because I thought it wasn't stable, but later found out that what really wasn't stable was my CPU overclock. I also had things running fine with lower memory clocks but saw error with higher memory clocks, but ultimately it was not enough Vcore on the CPU and not the memory's fault.

Do you see WHEA warnings being logged in the Windows Event Viewer?
As I mentioned in my original post in the description of things I've tried, I already removed the processor OC and the problem does not change.

Where exactly to I look for WHEA warnings? I've poked around in the Computer Management app where lots of event viewer things are and I don't know exactly what I'm looking for there.
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post #6 of 41 (permalink) Old 12-13-2018, 04:54 PM
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Try with another software like several instances of HCI MEMTEST or a live cd of linux + stressapptest. Memtest is a very old application and that error can be a false positive

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post #7 of 41 (permalink) Old 12-13-2018, 04:54 PM
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Quote: Originally Posted by jfriend00 View Post
As I mentioned in my original post in the description of things I've tried, I already removed the processor OC and the problem does not change.

Where exactly to I look for WHEA warnings? I've poked around in the Computer Management app where lots of event viewer things are and I don't know exactly what I'm looking for there.
I apologize, I overlooked that you already tried it.

About the WHEA warnings:

Select the "Administrative Events" category on the left, then look in the "Source" column for events that say "WHEA-Logger". The level for the events will be "Warning". You can sort the list by the date column and can then scroll through what was happening the last few days.

Those WHEA warnings mean that the CPU itself is noticing corruption and fixing it. If those kind of warnings show up, it's a sign that things aren't 100% stable and that settings could be improved.
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post #8 of 41 (permalink) Old 12-13-2018, 05:05 PM - Thread Starter
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Quote: Originally Posted by deepor View Post
I apologize, I overlooked that you already tried it.

About the WHEA warnings:

Select the "Administrative Events" category on the left, then look in the "Source" column for events that say "WHEA-Logger". The level for the events will be "Warning". You can sort the list by the date column and can then scroll through what was happening the last few days.

Those WHEA warnings mean that the CPU itself is noticing corruption and fixing it. If those kind of warnings show up, it's a sign that things aren't 100% stable and that settings could be improved.
I don't see any WHEA warnings in there. I guess that's a good sign.
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post #9 of 41 (permalink) Old 12-13-2018, 05:46 PM - Thread Starter
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Quote: Originally Posted by lexer View Post
Try with another software like several instances of HCI MEMTEST or a live cd of linux + stressapptest. Memtest is a very old application and that error can be a false positive
Do you know any modern memory test apps that can be booted from a DVD or USB stick? I'd like to test outside of Windows so when I'm testing overclocking, I don't boot Windows until I have reason to believe the memory is solid (and thus avoid one possible way your Windows installation gets corrupted).

HCI MEMTEST looks like it's a Windows app so it can only test unused memory and requires booting into windows before running it.

linux + stressapptest looks like I'd have to install Linux on my computer first which isn't my favorite path to go.

Any DVD bootable suggestions?
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post #10 of 41 (permalink) Old 12-13-2018, 06:10 PM
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Quote: Originally Posted by ThrashZone View Post
Hi,
Might just try with two sticks in
If it passes try the other two sticks
If they pass it's just the board doesn't like running with all four sticks in there that high.
Hi,
Cough cough
Anything especially hard about the above
If nothing it could point to which couple is bad and then test one stick at a time till you find the bad one or if all are good.

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GPU
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RAM
Trident-Z 3200C14 4x8gb's b-die default timings 14-14-14-34
Hard Drive
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Power Supply
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2-240 GTX Black Ice Nemesis rads/ D5 pump-res combo and D5 top before and after rads.
Case
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Red Dragon Perdition
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