I have 4gb of RAM but can only use 3.2gb?

By flowerpoop
Aug 6, 2008
Topic Status:
Not open for further replies.
  1. I just installed an extra 2 gb of ram (OCZ Reaper HPC 42 x 1GB 1150MHz) and Rainmaker is telling me I'm only getting 3.25. I called up OCZ and the guy said because I have windows xp (32 bit) that I won't be able to use all 4, but tigerdirect has a chart that tells me I should be seeing all 4. So, who's right?
  2. Ph30nIX

    Ph30nIX Newcomer, in training Posts: 359

    XP will only see the first 3.5gb or so.
  3. captaincranky

    captaincranky TechSpot Addict Posts: 10,004   +710

    More RAM for Me and My Men............

    You might be able to see it in BIOS and then not in system information. OCZ is correct that you won't be able to use it.

    As to whether you should be able to see the additional RAM in Windows itself, that may depend on the motherboard. A board which is 32 bit hardware will not even show the extra RAM to the OS. I'm not sure if 64 bit boards will or not.

    You might want to check out this M$ page about "4 GB Tuning", (alias "The 3 Gigabyte" switch). As I understand it, this can only be accomplished with XP Pro, (32 bit obviously).
  4. Tedster

    Tedster Techspot old timer..... Posts: 10,067   +13

    32 bit operating systems are limited to 3 gb of ram. You must use a 64bit OS.
Topic Status:
Not open for further replies.


Add New Comment

TechSpot Members
Login or sign up for free,
it takes about 30 seconds.
You may also...


Get complete access to the TechSpot community. Join thousands of technology enthusiasts that contribute and share knowledge in our forum. Get a private inbox, upload your own photo gallery and more.