Installed 4GB RAM but only 2GB is being used

I have Vista 32-bit and I started out with 2GB RAM (1GB in each of the two slots). I do a lot of work with video so I decided to up my RAM to the max 4 (2GB sticks in both slots). So when I did that and booted everything up it only shows as having 2GB total. I ran CPU-Z and it told me I had 2GB as well. What's going on here? Is one of them faulty? Do I need to update my BIOS?

Please help!
Thanks,
~Kris
18 answers Last reply
More about installed used
  1. Did you buy RAM that's compatible with your motherboard? What motherboard and RAM kit do you have?
  2. Full system specs are required to answer this question. It is most likely one of two problems however. You either have to many devices in your machine and your 32bit copy of windows has run out of memory space for all your ram, or you need to enable the memory remap hole in your bios.
  3. sounds like your mb can't read 2 mem sticks that large
  4. A third possibility, but not likely. If it can run vista, then it can handle 2GB sticks. Older chipsets can't, but they wouldn't be able to handle vista. Could be an odd mobo or some weird compatibility problem...
  5. mb that can't run vista ? ? ?
  6. Newer boards can't run win9x, probably due to lack of drivers. I would assume the same to be true for older boards. You suggested that the chipset can't handle 2GB sticks. Possible, but if its running vista, it can handle 2GB sticks.

    Clearer?
  7. 4745454b said:
    Newer boards can't run win9x, probably due to lack of drivers. I would assume the same to be true for older boards. You suggested that the chipset can't handle 2GB sticks. Possible, but if its running vista, it can handle 2GB sticks.

    Clearer?

    That's an incorrect statement. An Asus P4P800-E Deluxe runs Vista, but it doesn't support 2GB modules.
  8. Nice try. Would you like to guess why? I guess I should have mentioned that as well...
  9. I'm not sure what you mean, but I didn't guess about the Asus P4P800-E Deluxe. The maximum module size is 1GB and it runs Vista Ultimate 32-bit just fine.
  10. Because it uses DDR1, which came in 1GB or smaller sticks. Did some looking, never saw any 4GB kits using 2x2GB.
  11. My reply was about "Possible, but if its running vista, it can handle 2GB sticks." which isn't accurate.
  12. your running Vista 32

    you need a 64 bit operating system for it to see the hole 4 gigs of ram
  13. pont said:
    your running Vista 32

    you need a 64 bit operating system for it to see the hole 4 gigs of ram


    he would still see more than 2 though usually between 3.2 and 3.7 depending on configuration
  14. Fine, if it has 2GB sticks in it, it can handle them. Either way the post suggesting it is wrong.
  15. Because of the nice round 2GB number, its probably the memory remap feature. Change it in the bios.
  16. krisskross said:
    I have Vista 32-bit and I started out with 2GB RAM (1GB in each of the two slots). I do a lot of work with video so I decided to up my RAM to the max 4 (2GB sticks in both slots). So when I did that and booted everything up it only shows as having 2GB total. I ran CPU-Z and it told me I had 2GB as well. What's going on here? Is one of them faulty? Do I need to update my BIOS?

    Please help!
    Thanks,
    ~Kris



    Had the same problem. Updated BIOS solved it.
  17. Transpose mem sticks and/or only install one at a time to test.
  18. Thanks for all the responses! Wow! I guess I will try fixing the problem in BIOS...I'll let you know... :)
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