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[Solved] 8GB Installed, 4GB usable on Windows 7 64 bit

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Last response: in Memory
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July 17, 2010 6:13:53 PM

Just wanted to help out others that end up with this problem seeing as it took me f----------------g forever to figure out a fix (with no little help from researching via google).

Anyway im running the following rig:

Intel Core i5-750 Lynnfield 2.66GHz (w/ Cooler Master Hyper 212 Plus) - OC'd at 4.0Ghz
8GB (2GB x 4) G.SKILL Ripjaws Series 240-Pin DDR3 SDRAM
SAPPHIRE Vapor-X Radeon HD 5850 (Cypress Pro) 1GB 256-bit GDDR5
ASUS P7P55D Deluxe LGA 1156 Intel P55 ATX Intel Motherboard
CORSAIR CMPSU-750TX 750W
Intel X25-M Mainstream SSDSA2MH080G2R5 2.5" 80GB SATA II MLC (SSD)
Western Digital Caviar Black 1TB 7200 RPM
Antec Nine Hundred Two Black Steel ATX Mid Tower
Windows 7 Ultimate 64 bit

Any way i had the problem when i installed 4GB more of memory (to make 8GB total) that my computer on recognized 4GB as usable and put the rest under "Hardware Reserved".

Steps i took for fix:

In bios make sure "Memory remapping" is enabled

Update bios to latest version

Voltage for DRAM to company specs (1.60v in my case)

---at this point none of it fixed the problem---

but then i RESEATED THE CPU AND DIMMS - afterwards my bios detected the Reseat cpu as a new cpu and subsequently detected all 8GB of memory.

So in my case if you have a rig similar to mine you have to reseat your CPU and heatsink for your 8GB of ram to become usable. Don't waste your time looking for an easy fix - it took me hours to no avail. Reseating takes some time if you do it right - but in the long run your PC runs cooler and it solved this problem.

Hope this is a lifesaver for others that have this problem!

- Statz



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a b } Memory
July 18, 2010 1:44:34 AM

Hmm, interesting. It normally it's either DIMMs not being seated properly or the motherboard having a few bent pins/not contacting a few pins which result in the loss of memory.
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September 27, 2010 12:51:00 PM

:hello:  Did have this problem, cured by reseating dimms, thanks to statz22..Have a p7p55d elx and the dimm slots are crap ??
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a b } Memory
September 28, 2010 3:08:42 AM

How do you reseating the Cpu? I mean, I know reseating DIMMs, but CPU?.. Do you mean the processor?
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a c 347 } Memory
September 28, 2010 4:03:01 AM

There are at least 6 possible reasons to date and OP touched on 3, memory mapping in this case was the fix.
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October 8, 2010 7:25:29 PM

Best answer selected by Statz22.
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March 13, 2011 12:41:58 PM

I had a similar problem. Opened the case and found that one of the DIMMS wasn't seated right. Pressed it in, and voila! -- all 8 GB now usable.
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April 12, 2011 12:37:05 AM

Didn't need to re-seat anything here, just needed to turn on Memory Remap feature in Bios. remap was originally disabled for over-clocking abilities.

Thanks
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September 14, 2011 6:47:58 PM

PEOPLE I have found the correct answer to all your memory detection problems type in msconfig go to boot , advance and uncheck number of prossocers and maximum memory . this will definitly fix your problem ... dun ever go on youtube for say and follow those dumbass videos that make your windows perform faster !
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January 4, 2012 2:35:44 AM

vadimua said:
PEOPLE I have found the correct answer to all your memory detection problems type in msconfig go to boot , advance and uncheck number of prossocers and maximum memory . this will definitly fix your problem ... dun ever go on youtube for say and follow those dumbass videos that make your windows perform faster !

ONLY THIS DID THE WHOLE WORK . THANKS :pt1cable: 
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July 30, 2012 2:23:09 AM

Thank you Statz for the info.

Tried the other suggestions on this thread, but reseating the memory worked for me:-)
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a c 146 } Memory
July 30, 2012 3:53:56 AM

This topic has been closed by Nikorr
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