Solved [Q] Windows XP Professional x64 Ram? Tags: RAM X64 Windows XP Last response: November 20, 2010 8:40 PM in Windows XP Share deathdealer1252 November 19, 2010 2:27:18 PM I just instaleld a fresh copy of Windows XP Professional x64, and from what I gather, this version can support up to 128 GB of ram? My system is currently only showing 16 GB out of 24 GB? Any ideas to why this might be? More about : windows professional x64 ram aford10 November 19, 2010 3:29:51 PM Check your motherboard specs. That may be the most that the motherboard can support. Best solution Ijack November 19, 2010 3:32:45 PM Check boot.ini to see if it has the /3GB switch. If so try removing it. Related resources Windows XP Professional x64 on Core I7? - Forum Clean Install Windows 7 Professional From x86 to x64 ) - Forum Windows XP Professional 64x - No Sound After Reformat - Forum drivers in " xp Professional x64 edition" - Forum Simple and Free Guide to Removing Malware - Forum Can't find your answer ? Ask ! Get the answer deathdealer1252 November 19, 2010 3:42:39 PM My motherboard supports 24 GB. Had Windows 7 installed and saw all 24 GB no problem. The issues is not my hardware, it is the OS. I will give that a try ijack, thanks. **EDIT That was it ijack, thanks again Zoron November 20, 2010 7:57:24 PM Ewww... why would you go backwards that way? XP-64 is Microsoft's red-headed stepchild... it gets no respect. Support for it is limited compared to Vista and 7. deathdealer1252 November 20, 2010 8:06:02 PM It was for testing, seeing if I got better results, The_Prophecy November 20, 2010 8:40:37 PM Best answer selected by The_Prophecy. Can't find your answer ? Ask ! Publish Related resources: ForumWindows XP Professional x64 performane. Forumq 9300 windows xp x64 ForumXP Professional x64 audio driver ForumWindows XP X64 RAM Problem only detects 3 GB ForumWindows XP X64 (64-bit) won't recognize all my RAM ForumWindows 7 x64 ATI display Drivers ForumDell oem windows xp professional x64 64-bit reinstallation disc ForumAre you still using XP professional x64 edition? ForumWindows XP Professional x64 ForumWindows XP Professional x86 vs x64 ForumMicrosoft Windows XP Professional x64 ForumWindows XP Professional x64 Edition / Pentium-4 / 3.2 Mhz .. ForumGetting past administrative password ForumMy Windows XP SP2 C:\\Windows\\Installer file has grown to 110GB ForumLaptop windows xp installation wont start More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !