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Troubleshooting a memory problem - urgently need some help

post #1 of 6
Thread Starter 
Hey everyone, I'm trying to resolve an issue with this machine.

( http://www.overclock.net/t/1015070/new-number-cruncher-computer/0_100 )

I upgraded the RAM from 4 x 2 GB (= 8 GB) to 4 x 4 GB (=16 GB) of RAM. The old RAM was two sets of dual channel Corsair CMV4GX3M2A1333C9 modules. The new RAM is four individual CMV4GX3M1A1333C9 and both the old and new RAM were sold through NCIX.

The RAM is being run at SPD settings, no OCing of the CPU or the RAM (can't do this; the system has to be rock solid stable because it processes ~800 GB of data at a time). However when I ran Memtest86+ 4.00 overnight I encountered ~200 errors. I then obtained memtest86+ 4.20 and ran it the next night and got 10 errors. I believe the second error was a failure on test #6.

I then tested each module individually, one pass each, no failures. All individual stick tests were done in DIMM_A1 on the motherboard, which is the blue slot nearest the CPU. I then decided to flash the BIOS from 1101 to 1201. So far, at 75% [EDIT: First pass now complete, no errors, EDIT #2: Test 3 just failed.] on the first pass, there are no errors. At this point I can't very well take ALL the sticks back to NCIX and exchange them, and in any case after some Googling I found out that the majority of problems are isolatable to a bad module out of a set, and returning the one module and exchanging it has worked.

Is there a IMC/Voltage issue here that manifests as transient memory errors?

Or should I start thinking about RMAs/returns?
Edited by Quantum Reality - 5/10/12 at 8:34am
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4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
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post #2 of 6
Thread Starter 
Update: I resolved this by removing one stick of four; sure enough as soon as I removed a particular stick the "bad RAM" results stopped coming. So now I know which stick to return for another one. smile.gif

EDIT: Google informs me that purchasers of this RAM often find that one stick of a set is bad, which suggests that while good sticks behave very well, the quality control is perhaps a bit iffy.
Edited by Quantum Reality - 4/28/12 at 5:21am
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
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post #3 of 6
I concur; I had the same issue with Corsair myself. I am running 8GB XMS3 stable, but only after replacing my previous sticks.
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My Mobile Beast
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I5 750 @3.809 Ghz MSI P55-GD85 XFX 5850 @ 801/1150 38c idle 8 GB Corsair XMS3 1600 Mhz 
Hard DriveOptical DriveCoolingOS
Raid 0 2TB, 1.5TB Hitachi backup SONY DVD Ram + Lightscribe Hyper 212 Plus Windows 7 64bit / Zorin 
MonitorKeyboardPowerCase
LG FLATRON W2361V Saitek V.5 Cyborg Silverstone Element 750w PSU Cooler Master CM690 II Advanced 
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post #4 of 6
Thread Starter 
Hey all,

Frustrating! I got what I thought was the bad stick replaced, only to run a memory test and find, now, that another failture has occurred! I Googled and there is a possibility that the P7P55 LX just doesn't play well with these Corsair modules but I'm wondering if the memory voltage is just too low. Does anyone know how to read out the operating memory voltage under Linux? (I cannot install windows on this computer to check what the chipset defines as "auto")

EDIT: Corsair's website specified 1.50 V at SPD for these modules. Unless anyone seriously recommends not to, I'm going to see if a voltage bump fixes things later.
Edited by Quantum Reality - 5/9/12 at 11:44am
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
post #5 of 6
Thread Starter 
Holy crudcakes this is annoying madsmiley.png

I ran a memory test with the OTHER suspect module removed, and I saw two more memory errors when I came in this morning. I've bumped the voltage to 1.55 V. Should I be bumping the memory controller or not? Folks, I could seriously use some help here. My boss let me get the extra RAM because it helps things a lot, and the fact that this RAM isn't performing 100% flawlessly IS a problem I need to fix, SOON.

[ EDIT: It looks like a RAM voltage bump to 1.60 V fixed things; I'll do more testing later, but I'll tab this one as "provisionally resolved" ]
Edited by Quantum Reality - 5/10/12 at 10:26am
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
4690K System
(12 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Cooler Master Hyper 212 EVO Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
post #6 of 6
the memory is rated for its speed and timing at 1.5v with only 1 stick when you add more you need to add voltage as well.
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