Win 7 system reserved memory (RAM)

[chenming_frank]

I have installed some ram in my desktop and the motherboard has 4 ddr 3 slots. The interesting thing is out of the 12gb ram recognized by my win 7 64 bit ultimate, only a portion of Ram is used and some is system reserved. I try to change the slots and the pairing of my rams 2*2gb and 2*4gb. I find out only whatever I put in the first two ram slots gets used. I.e. I can put a 2gb + a 4gb in the first two slots and a 2gb + a 4gb in the other two. Then, the system reserves 6gb out of 12gb in total and uses the rest 6gb. If I put a 4gb + a 4gb in the first two slots, 2gb +2gb in the other two slots, then the system uses 8 gb and reserves 4gb. I have searched different forums to find an answer and reinstalled the win 7 version as 64 bit ultimate. The problem persists.

I don't know if its a hardware issue so here I posted a link to my hp desktop. Most components are original besides I upgraded my graphic card and now is asus 2gb ddr5 geforce650ti boost. The power unit is now at 600w. I added two 4gb ram and took one 2gb ram from the slot. Here is the link: http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay?javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken&javax.portlet.prp_ba847bafb2a2d782fcbb0710b053ce01=wsrp-navigationalState%3DdocId%253Demr_na-c01916917-27%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.tpst=ba847bafb2a2d782fcbb0710b053ce01&ac.admitted=1396014187501.876444892.199480143




Thanks a bunch for reviewing my posting and providing your opinions.

 

[ahnilated]

This is NOT a problem, this is the normal way that Windows 7 runs.

Read this:

http://blogs.technet.com/b/markrussinovich/archive/2008/07/21/3092070.aspx