4GB RAM SHOW 3GB AT WINDOWS

2009-07-11 3:16 am

I used to have 3gb ram at my notebook, then I change it to 4gb. I check the BIOS and shows 2gb + 2 gb. But when I check the windows (VISTA HOME-P), it shows 3gb only. WHY?? what can i do???

回答 (2)

用戶245952

2009-07-11 4:55 am

✔ 最佳答案

Did you installed the sp1 for Vista? Download the SP1 for Vista and install it and it will fix this problem.

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peterlau621

2009-07-11 10:24 pm

WHY??
Maximum memory capacity of 32bit Windows is ~3.25GB , though it is possible to physically install 4GB of memory, the actualamount of memory addressable by an operating system will be limited to~3GB. This limitation does not exist in the 64-bit operating systems Windows XP Professional 64-bit and WindowsVista 64-bit Editions.

vista ultimate 32-bit

圖片參考：http://i10.tinypic.com/4zm6j6d.gif
result: 3070 MB (3.0 GB)
comments: ...vista 32 is stuck with the 3.0~3.25 GB limitation...

vista ultimate 64-bit

圖片參考：http://i11.tinypic.com/6evvpd0.gif
result: 4030 MB (3.93 GB)

comments: no surprise here... 64-bit OSes are supposed to work asadvertised with 4+ GB of physical memory. i would have been moresurprised if vista x64 didn't work.

what can i do???
upgrade to 64bit windows....

2009-07-11 15:05:50 補充：
http://forum.thinkpads.com/viewtopic.php?t=49703

參考: 個人知識 + weblinks above

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