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MemTest86 Instant Errors, bad RAM or Mobo? Maybe even the CPU?

post #1 of 4
Thread Starter 
I ran some tests with Memtest86, and I get errors immediately.

I've got 4 4GB sticks of RAM that I have tested individually.
Stick 1 in Slot 1, 2, 3, 4 and the same for each. 16 tests in total

When launching Memtest, it takes a little while to get errors, but when I do it gets 65535+ quickly once it reaches a test that uses all the cores at once. I decided to test all of the sticks by starting off with a Parallel test by pressing C, 4, 1, 0 when it loads up and errors come instantly.

I've ran the tests at stock speeds, enabled XMP, upped some voltages,turned HT on and off, disabled some CPU cores, and the only thing that worked to get rid of the errors was disabling all buy one Core. With only one core active, I got no errors. Enabling 2 brought them all back, along with three.

I've tried lowering some clock speeds and that doesn't help at all.


I'm pretty sure something is wrong, I get occasional game crashes and other memory errors.
What do you guys think is most likely the problem?
Since the Sandy Bridge CPUs have the memory controller integrated, I'm thinking it could be that, bad memory slots on the motherboard, or an unlikely four bad sticks of RAM.

I'll probably get some extra RAM to test in a few days as that would be the cheapest.


i7-2600K
G.Skill Ripjaws 4x4 1600 - http://www.newegg.com/Product/Product.aspx?Item=N82E16820231315
MSI P67a-C43 (B3) - http://www.newegg.com/Product/Product.aspx?Item=N82E16813130571
MemTest86 V4.3.2

If you want any pictures of the Errors that I get, I'll go get some.


I'd also like to say that I've ran the test on two other computers and didn't get a single error. Doubt anything is wrong with the test or the actual DVD I burned it to.
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post #2 of 4
Both the newest MemTest86 and the beta MemTest86+ 5.0 apparently give false positives when run in parallel mode. They did that with my MSI Z68A G43 but not with any of my older motherboards (Socket 775, AM2).

OTOH G.Skill 1600 MHz memory is made of 1333 MHz or no-name chips (a common practice with almost all retail brands), and a lot of motherboards won't reliably run 4 DIMMs at once, at least not at the full rated speed of the RAM chips.
post #3 of 4
Thread Starter 
What would you recommend I do to test for errors if MemTest has false positives?
I get errors while I'm playing games, so something is definitely causing some trouble.

I just ran MemTest86+ v4.2 and it did 2 passes on the Standard test, showing up three errors. I was using one stick running at DDR3 1333 set in the BIOS.

I've also tried updating my BIOS, should be at the latest version for my motherboard according to the manufacturer's site.


If these errors are all false positives, the only thing I could think of is that maybe something from within my OS is corrupted.
To test for that, I'd have to install another OS and use that for about a week to see if I get any strange errors. Is there anything else you could suggest I do between that and now?

I've installed this OS to 4 different hard drives, using both cloning and a CD for some, and I still got application crashes and strange errors. I've also tried switching the SATA port.
i7 Sandy
(8 items)
 
Skylake Pentium
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-2600K ASRock Z75 Pro3 GTX 970 16GB 
Hard DriveOSMonitorPower
250GB Samsung 850 Evo WinXP Pro / Win7 Pro 1080p 60Hz Thermaltake Smart M850W 
CPUMotherboardGraphicsRAM
Pentium G4400 ASRock H110M-HDV GTX 550 Ti 8GB (2x4) 
Hard DriveOSPowerOther
250GB SSD Windows 7 500W 300Mbps WLAN 
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i7 Sandy
(8 items)
 
Skylake Pentium
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-2600K ASRock Z75 Pro3 GTX 970 16GB 
Hard DriveOSMonitorPower
250GB Samsung 850 Evo WinXP Pro / Win7 Pro 1080p 60Hz Thermaltake Smart M850W 
CPUMotherboardGraphicsRAM
Pentium G4400 ASRock H110M-HDV GTX 550 Ti 8GB (2x4) 
Hard DriveOSPowerOther
250GB SSD Windows 7 500W 300Mbps WLAN 
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post #4 of 4
You can run MemTest86+ in failsafe mode and specify that only one CPU core be tested at a time. I don't remember the options available in MemTest86, but I think you have to use a version 3.xx to avoid trouble with it.

Then there's Gold Memory, which sometimes beats MemTest86/86+ in finding errors and did better than MemTest86 in a very recent review by RealWorldTech.com just 13 years ago. (that's the newest evaluation of memory diagnostics I've been able to find on the Internet)
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