Random Reboot without BSOD, Memtest Fails Hammer Test

[majarman]

EDIT: Here's the Memtest86.log file: Memtest86.log - Pastebin.com

I have been having a few issues with my custom build recently. I have noticed my computer randomly rebooting after being idle for a while, but it hardly ever does this during use (still hasn't). It also hangs a little more frequently. It never used to do this before, but I suspect memory faults?

I don't remember if this started happening before or after I enabled XMP in my BIOS.

What should I be looking at? I disabled XMP but the rebooting issue and memtest failures persist.

Thank you for any help you can offer. It's much appreciated!

Here is the memtest86 report (if I need to post something else, let me know):

Summary

Report Date 2015-03-25 10:17:58
Generated by MemTest86 V6.0.0 Free (64-bit)
Result FAIL
System Information

EFI Specifications 2.31
CPU Type Intel Core i7-4790 @ 3.60GHz
CPU Clock 3600 MHz [Turbo: 4000.1 MHz]
# Logical Processors 8
L1 Cache 64K (160451 MB/s)
L2 Cache 256K (60858 MB/s)
L3 Cache 8192K (45488 MB/s)
Memory 8239M (18062 MB/s)
DIMM Slot #0 4GB DDR3 XMP PC3-12800
Corsair / CML8GX3M2A1600C9
9-9-9-24 / 800 MHz / 1.500V
DIMM Slot #1 4GB DDR3 XMP PC3-12800
Corsair / CML8GX3M2A1600C9
9-9-9-24 / 800 MHz / 1.500V
Result summary

Test Start Time 2015-03-25 01:00:28
Elapsed Time 6:10:01
Memory Range Tested 0x0 - 22FE00000 (8958MB)
CPU Selection Mode Single: CPU # 0
# Tests Passed 44/48 (91%)
Lowest Error Address 0x21C4470AC (8644MB)
Highest Error Address 0x21C4470AC (8644MB)
Bits in Error Mask 0000000000020000
Bits in Error 1
Max Contiguous Errors 1
Test # Tests Passed Errors
Test 0 [Address test, walking ones, 1 CPU] 4/4 (100%) 0
Test 1 [Address test, own address, 1 CPU] 4/4 (100%) 0
Test 2 [Address test, own address] 4/4 (100%) 0
Test 3 [Moving inversions, ones & zeroes] 4/4 (100%) 0
Test 4 [Moving inversions, 8-bit pattern] 4/4 (100%) 0
Test 5 [Moving inversions, random pattern] 4/4 (100%) 0
Test 6 [Block move, 64-byte blocks] 4/4 (100%) 0
Test 7 [Moving inversions, 32-bit pattern] 4/4 (100%) 0
Test 8 [Random number sequence] 4/4 (100%) 0
Test 9 [Modulo 20, ones & zeros] 4/4 (100%) 0
Test 10 [Bit fade test, 2 patterns, 1 CPU] 4/4 (100%) 0
Test 13 [Hammer test] 0/4 (0%) 4
Last 10 Errors
[Data Error] Test: 13, CPU: 0, Address: 21C4470AC, Expected: 00000000, Actual: 00020000

Here are my specs, as I have them listed on my profile:
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom
OS
Windows 7 Home Premium 64 Bit
CPU
Intel Core i7-4790
Motherboard
Gigabyte Z97X Gaming 3
Memory
8 GB (2x4GB) Corsair Vengeance LP 1600 1.5v
Graphics Card(s)
XFX HD-687A-ZNBC (HD6870 black edition 1GB)
Sound Card
N/A
Monitor(s) Displays
N/A
Screen Resolution
1920x1080
Hard Drives
Samsung 840 EVO 250 GB SSD
WD Purple 2.0 TB HDD
PSU
750 Watt

 

[Gator]

Upon any failures with memory you have either bad memory or a bad memory controller.

You can find out which one it might be by using the link below:
http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

Also of help, below is something one of our members Arc posted a while ago.

http://www.sevenforums.com/bsod-hel...driver-problem-99-9-likely-2.html#post2749913

 

[carwiz]

Follow the procedure in Part 3 of this tutorial: http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

It will help determine which module or slot is bad. The bad module(s) will have to be replaced. There is no way to repair memory errors. Your model carries a lifetime warranty so other than the inconvenience, it shouldn't be too painful.

 

[carwiz]

There's an echo in here.... here..... here.

I guess I should have refreshed the page.

 

[Gator]

There's an echo in here.... here..... here.

I guess I should have refreshed the page.

Its ok, great minds think alike

 

[majarman]

So I ran the tests, and something interesting happens. When I ran the tests initially, it always failed exactly once in the same way in test 13, the hammer test, with a single 1 bit error. When I tested the sticks one at a time, in each slot, they worked perfectly. The only way to reproduce the error is by testing them both simultaneously.

 

[Boozad]

Are you using MemTest86+ or just MemTest86? There's a big difference.

 

[majarman]

Memtest86-6.0.0.iso that I'm running off a bootable flash drive, extracted using Rufus if that means anything.

 

[carwiz]

Strange. Here's what I see when I go to the download page.

 

[Boozad]

He's using this Ken.



Once more for the OP as you seem to have misread the links provided above, or not read them at all.

Download and run MemTest86+ to test your RAM. http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

   Note

Run MemTest86+ for at least 8 passes. Ideally set it off before you go to bed and leave it overnight, we're looking for zero errors here. A single error will show something's going bad with your RAM.

 

[majarman]

I apologize, as I went through google for the download after I read the links and didn't realize they were indeed two different things. I will now test it with Memtest86+ and post the results. Sorry for the flub.

 

[Boozad]

No problem, let us know the results.

 

[majarman]

I ran two passes with the proper Memtest86+ (since I need to travel back home for the weekend and am leaving soon) and returned no errors whatsoever. I am curious about the one bit error on the hammer test with memtest86, but the computer hasn't been hanging or rebooting lately....

Should I continue with a full seven passes or should I call it solved by unknown divine intervention?

 

[Boozad]

No let it run the full eight passes, that's the least you should go for to get conclusive results.

 

[majarman]

So I left it running over the weekend (accidentally). It ran 41 times and returned no errors. Am I good? Should I even worry about the single bit error on the hammer test with Memtest86?

 

[majarman]

Sorry to keep this going, but it has been randomly restarting again. What do I need to look at? Since there's no memory problems, what would cause it to reboot with no bsod? Is there a log somewhere that I need to dig up?

 

[carwiz]

http://www.sevenforums.com/tutorials/174459-dump-files-configure-windows-create-bsod.html

Check your settings against the above tutorial. Use Option One, steps 1-4 then step 6. After that jump to step 9.

 

[majarman]

I have found the following dump files so far, but I'm not sure how to open them or decipher what they mean. If anyone can find the reason behind the random reboots in these files you are golden.

https://www.dropbox.com/sh/7vuf2zzrta532co/AACqzFhgZ804DfWl9Q9eoupza?dl=0

EDIT: I have found out how to open them in Visual Studio, but I'm not quite sure how to decipher the problem. If anyone needs me to post a link to the dump output on pastebin I can do that as well, or you could run it through VS with WDK because you probably know more about this than I do.