Dell Optiplex gx620, RAM limits Tags: Optiplex RAM Dell Motherboards Windows XP Last response: October 8, 2012 3:28 PM in Windows XP Share atxpiper October 8, 2012 3:32:28 AM I have a Dell Optiplex gx620 motherboard and have installed 8GB of RAM memory. From previous posts I see the limit for that motherboard is 4GB, but in BIOS it sees all 8GB. Will programs running on my XP computer use all 8GB? More about : dell optiplex gx620 ram limits | E-mail me updates | Report abuse Register or log in to remove Hawkeye22 Motherboard Expert October 8, 2012 1:16:30 PM The manual indeed says 4gig of ram. A bios update may have allowed it to see 8 gig, not sure. Anyhow, XP 32 bit will only see ~4gig of ram. You need a 64 bit OS to see more than 4 gig. | Report abuse atxpiper October 8, 2012 2:23:20 PM Is seeing the same as using? For example, if I were to play a RAM intensive game, would it use only the 4gb seen by xp or the entire 8gb I physically have installed? Also, another follow up question that's probably stupid, will a OS upgrade to 7 allow programs to use all the RAM installed or is the limitation set by the motherboard? Thanks | Report abuse Hawkeye22 Motherboard Expert October 8, 2012 3:28:30 PM It will only use the 4 gig. As stated, you need a 64 bit OS to be able to use over 4 gig. | Report abuse Register or log in to remove Ask the community Publish Tom's Hardware>Forum>Windows XP>Dell Optiplex gx620, RAM limits> Related ressources: ForumDell Optiplex GX620 upgrades ForumDELL OPTIPLEX GX620 ForumDell optiplex gx620 is compatible with GeForce 9800GT? ForumRAM /Memory Issue - Dell Optiplex GX620 ForumHelp with CPU upgrade for Dell OptiPlex GX620 , please! ForumWorth upgrading a Dell Optiplex GX620 to SSD? ForumNo Power to my Dell Optiplex GX620 ForumWhat Memory is Compatible With Dell Optiplex GX620 ForumLooking for a video card for my Dell Optiplex gx620 ForumDell Optiplex GX620 Upgrade ForumDell Optiplex GX620 + Core 2 ForumMemory upgrade Dell Optiplex GX620 ForumDell optiplex gx620 windows 7 compatibility ForumDell optiplex gx620 SFF cooling issues ForumHELP!!! Please with Windows XP Forum6 beeps on dell optiplex gx270 ForumDell laptop intel core duo cpu usb drivers download for windows xp ForumWww dell inspiron 6000 drivers free download ForumInstalling drivers and utilities from Dell OEM CD ForumInstall xp 64 bit/xp 32 bit on dell inspiron n5010 64 bit More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !