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Missing RAM ???

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July 22, 2011 10:02:53 PM

I have an odd question - I have plugged in 3 corsair dominator sticks of ram that are 1600s (3x2GB). On boot and through Belarc advisor, I am running 4gb of memory rather than the 6 that should. I have pulled & rotated the sticks, replaced the whole mess with other 3x2gb / 1333 sticks, yet only 2/3 of my memory ever reports. Am I hosed? I am thinking my a1/a2 slots on the mobo are toast. Any alternative ideas?

More about : missing ram

a b } Memory
July 22, 2011 10:11:36 PM

What OS are you using? Unless it is a 64-bit OS, you will only see 3.5 to 4 GB based on the limitations of a 32-bit system.
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July 22, 2011 11:18:19 PM

Ahhh yes, I neglected to mention - OS = Winders 7- 64 bit
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a b } Memory
July 23, 2011 9:08:22 AM

And what motherboard / CPU?

The kits of 3 DIMMs are intended for Core i7 9xx CPUs, which are LGA1366, triple channel.

Depending on the motherboard, if you plug 3 DIMMs into a motherboard that's intended for dual channel, you may find only the pair of DIMMs recognised, and the odd one ignored. If you added a fourth DIMM you might find the second pair gets recognised.
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July 25, 2011 6:21:15 PM

the mobo is an ASUS P6T.... and the CPU is in fact an Intel i7 940(?) At work now so could be a different 9.. model.

To add to the confusion, I had this big daddy built for me for W7/64 bit with the 6gb that worked at one time, then after about 8 months it began irratically power cycling, I replaced the power supply, mobo (with identical one), ram, scsi card, video, and dumped countless hours into trouble-shooting via the event viewer. At the end of the day it was my antique UPS (thx apc). That was about 8 months ago, I do not know where in the process all my ram quit reporting though.
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