Missing RAM in 64-bit System Tags: Memory RAM Windows Vista Last response: January 28, 2009 11:28 PM in Memory Share pennyfan87 January 27, 2009 2:39:50 AM Hey dudes. So I recently upgraded to 2 x 2GB of DDR2. I was running Vista x86, and it only recognized 3.something GB of RAM, which was expected. So I spent like a couple of days installing Vista x64 and reinstalling all my applications. But guess what? Still just 3325MB of RAM show up in Windows. The BIOS recognizes all 4GB. How can I get the rest of the RAM to show up? Here are some pics that might help: Thanks! More about : missing ram bit system GhislainG a c 78 } Memory January 28, 2009 11:28:22 PM You need a newer motherboard that supports memory remapping. Can't find your answer ? Ask ! Publish Related resources Win7 64-bit memory missing ? Forum Vista 64-bit install error, missing /corrupt install.wim Forum Win 7 64-bit doesnt use all installed RAM Forum Win7 64-bit , 4gb RAM - only 3.5gb showing - help! Forum Win 7 64-BIT (Home Premium) Not using all ram . Forum Pagefile Size Windows Vista 64-bit with 8GB RAM Forum 4x1GB RAM on Windows XP 64bit - any issues? Forum Settle a debate: how many of you use a 64-bit OS or >=4 GB RAM ? Forum whats good about the 64bit OS besides the 4gb of ram ?? Forum Why do I have 64-bit Vista? Is this a waste of a x64 system ? Forum [NEW BUILD]X3 Core, 8GB 1333 RAM , etc - Compatible? Missing anything? Forum 64-bit system not recognizing all memory. Forum UPDATED** System built for Vista 64-bit $3500 BUDGET**UPDATED Forum Missing Ethernet Controller drivers W7 64bit intel G41 express chip Forum EX58-UD3R Missing Ram Forum Upgrading to Windows Vista 64-Bit from 32-Bit on new SSD Forum Help updating BIOS Forum DDR3 RAM in my Gateway FX 6800-01e... Helpppp!!!! Forum Dimmension 4700C RAM to 2 x 2gb ? Forum Missing Soft Menu III on a KX7-333R Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !