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HELP Only 2GB of 4GB RAM is recognized!!!!

Last response: in Memory
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December 28, 2012 12:07:50 AM

Hi All,

Specs involved

i5 750
EVGA P55 LE
2- 2GB G-Skill DDR3
Windows 7 64-bit

Ive recently OC'd my i5 750 to 3.6ghz with BCLK at 180 and multiplier x20
I left all the voltages at auto turned off speedstep and turbo mode (Cstates on) The OC seemed fine no problems at all though i did not use any stress test however I didn't feel the need to since 3.6 is a known stable OC for the i5 750. Throughout the day i realized that the ram was only 2gb of the 4gb i have installed.

Heres the odd part did some research on it and no one seems to have the problem that i am having because all the other threads I've looked at had solutions (ie. 32bit instead of 64bit, msconfig max mem on/off, bios)

For my bios setting i have mostly everything on auto and for the
Mem gap (auto)
Mem remapping (auto)
PCI Allocation 4gb to 2.5gb*
Mem hole (off)

As for the msconfig solution i already had the max mem unchecked therefore that was of no use to me.

And running windows 7 64-bit theres no reason as to why the os wouldnt support 4gb considering I've had 4gb up until the OC.

I wonder if this has anything to do with the OC memory target of 1444mhz
while i believe the memory is 1333mhz.

I'd greatly appreciate any comment pertaining to my condition.

More about : 2gb 4gb ram recognized

a c 241 } Memory
December 28, 2012 12:22:47 AM

You need to adjust your fsb/ram ratio down, ram does not like to run much higher than it is specked for.
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December 28, 2012 1:36:25 AM

Actually i just checked and the ram is spec for 1600mhz but previous it was running at 1333mhz. Also the ratio is 2:8 right now.
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a c 241 } Memory
December 28, 2012 2:22:11 AM

Then it should have no issues running at 1444.
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December 28, 2012 3:34:39 AM

But it only recognizes 2gb of the 4gb installed.







Is there anything wrong with the times or clocks on the memory?
http://www.newegg.com/Product/Product.aspx?Item=N82E168... I am sure this is the g skill I have, I am new to OC'ing but looking at the times would that affect it somehow. ( I thought it wouldn't since I didn't touch the times I left them on auto)
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December 28, 2012 5:10:03 PM

Alright so i tried out that ratio lowering but that resulted in a failed OC (PC wouldn't respond after power up), therefore I reset my CMOS, the loss of ram was definitely related to the OC because after I reset the CMOS the 4gb appeared again. Also my ram is DDR3-2000 PC3-16000.

Does anyone know what the problem could be?
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