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I have 4 gigs of ram, but really only 3!

Last response: in Memory
October 16, 2008 9:04:45 PM

Hi everyone, I have 4 gigs of ram, and my computer properties are only telling me 3.25. I decided to investigate further. I reseated all my ram, then checked the BIOS. It was reading 4 gigs! So then I went back to windows XP, and still 3.25 gigs! Any thoughts?

PS CPU-Z says 4gigs of ram

More about : gigs ram

October 16, 2008 9:12:29 PM

omg is this a joke?
October 16, 2008 9:20:11 PM

Win XP 32 bit will only see just over 3gigs it will not see four even if you put 4gigs in only 64 bit win Xp or Vista will see All 4gigs
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October 16, 2008 9:23:44 PM

Windows XP does not recognize more than 3.25 gigs of RAM.

This is because XP is a 32bit operating system, so the maximum theoretical amount of recognized RAM is 2^32= 4GB. Subtract some overhead (someone else here is sure to be able to explain what that overhead is exactly) and you're at 3.25GB.

If you want to make use of all your available RAM, or install more, then you will need to use a 64bit OS.

Hope this helps.
October 16, 2008 9:26:25 PM

You really should use the Search function but I will answer your Question as best I can. 32 BIT operation systems like XP and even Vista 32 only report 3.xx GB of RAM. The amount past 3 GB is different and depends on the MB manufacturer. This is due to the BIOS and what it reserves. Most PC's show between 3.25 and 3.5 GB when 4GB or more are installed. I will say that my Vista 32 Business install saw 3.5GB (out of 4 GB) but I now see 4GB after I installed Vista SP1.
October 16, 2008 9:39:02 PM

Ain't there a sticky for this question?
October 16, 2008 9:43:17 PM

apparently stickies arent enough

the stickies should be the first thing anyone is allowed to see when entering toms because 5 times a week someone has the same question
October 16, 2008 9:49:16 PM

is google broken?