4gb of 8gb installed ram going to hardware reserved

you need to use 64-bit os so windows can recognize 4+ gb ram

sorry left out my OS in the system info i'm using WIN7 64-bit.

when i got to the resource manager in windows it says total memory installed 8gb but it has 4gb going to hardware reserve

nothing has worked so far .

the only thing i didn't mention in the above specs is my HDD which is a western digital 1TB drive

i have already reset the CMOS, but i did it again and still no change.

i have attached a screenshot of the resource manager in WIN7 hope it helps



By shadowfire1091 at 2010-11-11

Please list the EXACT RAM part-number(s) and/or I prefer link (s).
{CM3X2G1600C9 is not a valid p/n; suggests Corsair 3X2GB modules @ 1600 MHz}

Also, your EXACT MOBO including (revision) and BIOS version.
{I noted the GA-P55A-UD4P v 1 or 2}

Clearly, this is 9/10 a case of mix-match RAM, and they appear NOT to play well together. Your MOBO is a Dual/Quad Channel and the 'ODD' 2GB is killing the second Dual Channel from some disparity {Speed, CAS, Voltage, etc} issue.

You probably will need to return/exchange ALL of the RAM for (2) Matched-Sets of 2X2GB or better a Matched-Set of 4X2GB which is the best option.

Certified for v2 MOBO {QVL} - http://www.gigabyte.us/products/product-page.aspx?pid=3...
Tested Corsair - http://www.corsair.com/configurator/product_results.asp...

I suggest - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Just to be a 'step ahead' - yes I realize 3X2 sets are often on the QVL list - BUT you can ONLY use 2 of the 3 sticks. Frankly, this is 'dumb' move on the MOBO QVL lists to omit an important caveat.

heya guys finally found the issue 1 yes 1 of the pins on the CPU socket had twisted, i straightened it up and everything is perfect now  

thanks for all the help and suggestions

I have same problem as darkdawn, 2050MB hardware reserved out of 4GB installed, 2MB reserved out of 2GB installed ! Everything tried, no luck !  

My system: Fujitsu Notebook LH520, 64-bit Windows 7 SP1, all updates installed, memory is DDR3 !

This problem is discussed all around, no luck in MS web site too !
Stupid MS steal our RAM !!!