Memory problems -- memtest86 gives anomalous results

drh

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hi SF gurus,

i have a homebuilt computer, ASUS P6T6 mobo with 6x2 GB of RAM, Intel Core i7 CPU. i ran memtest86+ 4.20 and observed the following: although all 6 2 GB memory sticks are seen and listed on the memtest screen, it says i only have 8 GB of total memory. yet, when the tests were run, instead of going up to 12 GB, or stopping at 8 GB, it tests up to 9216 MB and then goes on to the next test, in every case. no errors were reported, but does this indicate there actually *is* a memory problem? also, given that no errors were reported up to 8 (actually 9) GB, can i assume that the problem is in sticks 4 or 5 (or the corresponding slots on the motherboard)?

thanks in advance for any thoughts.

-drh
 

My Computer

Computer Manufacturer/Model Number
homemade
OS
Windows 7 64 bit
CPU
Intel Core i7
Motherboard
MOBO: ASUS P6T6 WS Revolution
Memory
12 GB Corsair (2 X 6 GB)
Graphics Card(s)
nVidia GTX 295
Sound Card
not sure
Monitor(s) Displays
Dell 24"
Hard Drives
Western Digital RAID 5, 900 GB
PSU
RaidMax Bronze 1200W
Case
xClio Windtunnel
Cooling
multiple fans
Definitely worth investigating. A simple solution would be testing the RAM modules one at a time instead of all together.

If each one passes without errors, then take one and test it in each slot successively.

Then test two together, then (let's say) four and then all six, each time keeping an eye on the reported amount of memory and the actual amount tested. Does the issue return?
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom-built
OS
Windows 7 Professional SP1 32-bit
CPU
Intel Core 2 Duo E6600 2.4GHz
Motherboard
Asus PL5D2
Memory
4GB DDR2-667 (4x1GB in dual-channel config)
Graphics Card(s)
nVidia GeForce 9800 GT
Sound Card
Creative X-Fi XtremeMusic
Monitor(s) Displays
Acer P236H
Screen Resolution
1920x1200 (DVI)
Hard Drives
OCZ SSD Vertex Plus 60GB SATA (Firmware 3.55), 64MB cache
Hitachi HD321KJ SATA, 320GB, 7200rpm, 16MB cache
PSU
Antec TruePower 2.0
Case
Cooler Master Centurion
Cooling
Too many fans
Keyboard
Standard
Mouse
Microsoft wireless optical mouse
Internet Speed
AT&T U-verse (18mbit/sec)
Antivirus
Microsoft Security Essentials
Browser
Firefox
Other Info
Other devices:
Compaq CQ-60 laptop
Google Nexus 7 (2012) tablet
Nvidia SHIELD tablet (US/LTE)
Hardkernel ODROID-XU single-board computer (Samsung Exynos 5420)
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