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Memory stable in Memtest86+ but crashes in LinX, need help

post #1 of 7
Thread Starter 
Hello. I'm wondering how would 2x4GB run compared to 4x4GB since we're talking about dual channel memory.

I think I've read somewhere that people often experienced problems with 2x8GB or 4x4GB, I just can't remember which of the two. Does anyone have more info on that?

Before you ask why I need so much memory, it's because I run a lot of applications in background while I do other stuff (such as multiple instances of Steam + TF2 while playing something else) so my current 2x4GB gets near its capacity (~80% used) which sometimes causes problems.

Thanks for help.

Edit:

Title used to be 2x4GB vs. 4x4GB on Asrock Z68 Extreme3 Gen3 + 2500K. Updated with problem, see posts #2 and #3.

By the way, I'm using Corsair Vengeance 1600 MHz.
Edited by kazzjohnson - 8/26/12 at 4:05am
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post #2 of 7
Thread Starter 
On a somewhat related note, why do I get a warning for too high physical memory usage at ~75%? The main program (for example a game) then crashes even though there's another 2GB (25%) to go. Really annoying.

I am going to run Memtest86+ tonight to see if there's a problem with RAM sticks.
Edited by kazzjohnson - 8/25/12 at 3:42pm
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post #3 of 7
Thread Starter 
I ran a MemTest86+ with each DIMM for 7 passes and there were no errors.

Now I ran LinX with all available memory (6614 MiB) and I got an error after 6 minutes and 20 seconds. Here's some info:

Size: 29392
LDA: 29400
Align: 4
Time: 341.451
GFlops: 49.5806
Residual: 4.079637e-008
Residual (norm.): 1.675643e+000

It can't be because of clock speed because it's on stock 3.3 GHz and I went as high as 4.3 GHz stable in past.

Can anyone help me interpret those results?
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Western Digital Caviar Blue 640GB 7200RPM Cooler Master Hyper 212 EVO Windows 7 Professional 64-bit Achieva Shimian QH270 Lite 
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post #4 of 7
Memtest86+ is only useful for basic defect testing. It's not multithreaded and not stressful enough to stress test modern platforms.

Don't use teh all available memory setting on LinX either, you need to leave a little more room to prevent paging. Try using 6GiB (6144MiB) and if you still get errors, double check that your voltages and timings are correct.
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post #5 of 7
Thread Starter 
Okay, thanks, I'll give it a go with 6144 MiB. All the RAM settings are set to their defaults in BIOS using the XMP profile for 1600 MHz.
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Western Digital Caviar Blue 640GB 7200RPM Cooler Master Hyper 212 EVO Windows 7 Professional 64-bit Achieva Shimian QH270 Lite 
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CPUMotherboardGraphicsRAM
Core i5 2500K Asrock Z68 Extreme3 Gen3 MSI Radeon HD 7850 Twin Frozr III 2GB GDDR5 Corsair Vengeance 2x4GB DDR3 1600MHz 1.5V 
Hard DriveCoolingOSMonitor
Western Digital Caviar Blue 640GB 7200RPM Cooler Master Hyper 212 EVO Windows 7 Professional 64-bit Achieva Shimian QH270 Lite 
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Samsung SyncMaster T200 Logitech Ultra Flat keyboard XFX XXX Edition 650W Zalman Z9 Plus 
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post #6 of 7
XMP could well be the issue, especially if the memory isn't recent.

It's almost always better to set the correct speed, timings, and voltages manually.
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Hard DriveHard DriveHard DriveCooling
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X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
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CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
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In progress
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CPUMotherboardGraphicsRAM
5820K @ 4.3/3.6GHz core/uncore, 1.225/1.2v Gigabyte X99 SOC Champion (F22n) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-11-12-27-T1, 1.37v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Reference R9 290X w/Stilt's MLU 1000e / 1375m E... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
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post #7 of 7
Thread Starter 
Well, it's been running like that for nearly half a year without any problems until recently. But to be honest, I can't say that back then I stressed memory like recently, using as much as 80% of physical memory.

Memory is recent, like I said it's Corsair Vengeance 2x4GB DDR3 1600MHz 9-9-9-24 from this year. Are you sure XMP profile could be the one to blame? I mean, everything is set to auto and clock speeds of both CPU and RAM are set to stock values, I really don't see how could that be a problem.
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Core i5 2500K Asrock Z68 Extreme3 Gen3 MSI Radeon HD 7850 Twin Frozr III 2GB GDDR5 Corsair Vengeance 2x4GB DDR3 1600MHz 1.5V 
Hard DriveCoolingOSMonitor
Western Digital Caviar Blue 640GB 7200RPM Cooler Master Hyper 212 EVO Windows 7 Professional 64-bit Achieva Shimian QH270 Lite 
MonitorKeyboardPowerCase
Samsung SyncMaster T200 Logitech Ultra Flat keyboard XFX XXX Edition 650W Zalman Z9 Plus 
MouseMouse PadAudio
Logitech G400 SteelSeries QcK Logitech Z-2300 
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My gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500K Asrock Z68 Extreme3 Gen3 MSI Radeon HD 7850 Twin Frozr III 2GB GDDR5 Corsair Vengeance 2x4GB DDR3 1600MHz 1.5V 
Hard DriveCoolingOSMonitor
Western Digital Caviar Blue 640GB 7200RPM Cooler Master Hyper 212 EVO Windows 7 Professional 64-bit Achieva Shimian QH270 Lite 
MonitorKeyboardPowerCase
Samsung SyncMaster T200 Logitech Ultra Flat keyboard XFX XXX Edition 650W Zalman Z9 Plus 
MouseMouse PadAudio
Logitech G400 SteelSeries QcK Logitech Z-2300 
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