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BIOS/Windows wont recognize more than two sticks of ram

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November 22, 2013 5:13:41 PM

OS Win 7 64bit
CPU i7 3770k
GPU AMD 6950
MOBO Asrock z77

I had 4 sticks of ram. My bios is in dual channel mode
One 2GB pair and one 1GB pair. A couple days ago I noticed that Windows was only recognizing 4GB of ram. I tried reseating all my ram, switched the slots around but bios/windows would only ever recognize the 2 2gb sticks.


So I assumed the 1GB sticks were dead and I went out and bought another 2gb stick. (I live in a small town, the only place selling them had a single stick for sale)
I put the stick in and windows/bios still only recognizes 4gb ram. I've moved them all around and every single ram slot on the mobo works and all 3 ram sticks work.
I also tried using two 2gb sticks as one pair and a 1gb/2gb pair, still didn't recognize more than 4gb

The timings on all 3 ram are the exact same and the speeds.

What I've done:
Reseated ram
Tested all ram
Suggestions elsewhere lead me to reseat my CPU
I checked msconfig and windows isn't limiting my ram
#1

#2

#3


Any idea why windows refuses to see more than 2 sticks of ram?

Also;
My keyboard and mouse work in the bios and they work once windows has booted up and I'm logged in
However, I have a patched kernel installed that I need to use sometimes and after all these ram issues started up and now I can't use my keyboard on the Windows Boot Manager page to select my OS

a c 2141 } Memory
November 22, 2013 6:13:18 PM

Could try kicking up the DRAM voltage + 0.06 and take the VTTCPU to 1.108 or so
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November 22, 2013 7:02:16 PM

Tradesman1 said:
Could try kicking up the DRAM voltage + 0.06 and take the VTTCPU to 1.108 or so

Set DRAM voltage to 1.6v and VTTCPU to 1.104

no change, still only seeing two sticks
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a c 2141 } Memory
November 22, 2013 7:37:35 PM

In that case, might check the the sticks it isn't picking up and run Memtest especially the stick in the slot closest to the CPU, if it test out OK may have a problem either w/ the MC in the CPU or the mobo itself, can pull the CPU (or better yet, before trying that loosen the heatsink just a hair - if that doesn't help, pull the CPU and check for bent pins in the socket
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November 22, 2013 9:36:10 PM

Tradesman1 said:
In that case, might check the the sticks it isn't picking up and run Memtest especially the stick in the slot closest to the CPU, if it test out OK may have a problem either w/ the MC in the CPU or the mobo itself, can pull the CPU (or better yet, before trying that loosen the heatsink just a hair - if that doesn't help, pull the CPU and check for bent pins in the socket

I've checked each stick, all working fine alone. They also all work together in pairs, in any slot. I've had them working in a1/b2, a1/b1, a2/b2
I did take off my heatsink and put it back on(big mistake now I have temp issues and have to buy some paste) but still no ram.

Any other ideas?

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November 23, 2013 7:16:33 AM

Could it be an OS problem? Should I try reinstalling windows?
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Best solution

a c 2141 } Memory
November 23, 2013 5:10:31 PM

Yep, may want to try reloading the OS
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