Windows 7 64bit memory problem

Hello,
I just bought a new desktop with a gigabyte GA-990 UD3 (rev 4.0) motherboard and with 8gb ram but somehow it says that only 3.96gb of ram is usable.
Anyone has a solution?

Solutions that did not work!
1) Unticking the maximum memory in msconfig
2) Updating Bios
3) Replugging the memory in different locations. (So i guess it must be a software problem)

Feel free to post any ideas.
Thanks
13 answers Last reply
More about windows 64bit memory problem
  1. What OS, sounds like you may be running a 32bit OS, if so, it can only use up to about 4GB
  2. Tradesman1 said:
    What OS, sounds like you may be running a 32bit OS, if so, it can only use up to about 4GB


    I am using windows 7 ultimate 64 bit
  3. Try going into BIOS and raising the DRAM voltage + 0.06
  4. Tradesman1 said:
    Try going into BIOS and raising the DRAM voltage + 0.06


    I can only make it 1.510 from 1.500V is it ok to proceed?
  5. Yes, should allow to step up higher, either manually typing it in or maybe using the arrow keys to get to 1.55- 1.56
  6. Tradesman1 said:
    Yes, should allow to step up higher, either manually typing it in or maybe using the arrow keys to get to 1.55- 1.56


    I put 1.56V but still it shows me 3.96gb usable from 8gb
  7. Do both sticks work by them selves in slot 1
  8. Tradesman1 said:
    Do both sticks work by them selves in slot 1


    Yes sir, I hope we can solve this because I am becoming a bit desperate.
  9. Ok, with a stick in slot 1, and DRAM voltage still at 1.56 change the CPU/NB voltage to 1.2, save, exit and shut down, install the 2nd stick firmly in slot 3 and give it a try - if still problems may want to pull and check the CPU for bent/broken pins
  10. Tradesman1 said:
    Ok, with a stick in slot 1, and DRAM voltage still at 1.56 change the CPU/NB voltage to 1.2, save, exit and shut down, install the 2nd stick firmly in slot 3 and give it a try - if still problems may want to pull and check the CPU for bent/broken pins


    Nope didn't work, all pins are straight.
    Should i keep it at 1.2 and 1.56V or should i change it back?

    Any other suggestion?
  11. Can change them back, are you sure it's Win 7 64? Ultimate comes with both 32 and 64 for install? Could try in 2-4 if already in 1-3, could also try in 1-2 or 3-4 if one of theose combos work and it sees all 8 in single channel and works then might be a bad MC (memory controller)
  12. Tradesman1 said:
    Can change them back, are you sure it's Win 7 64? Ultimate comes with both 32 and 64 for install? Could try in 2-4 if already in 1-3, could also try in 1-2 or 3-4 if one of theose combos work and it sees all 8 in single channel and works then might be a bad MC (memory controller)


    I am sure yes that it is win 7 64. I tryed now with 1-2 it gave also the same that 4gb usable only.

    Do you think it might be because of the hardware? or is it software?

    If i Install win8 would it work?
  13. Might, might not, don't know, we've tried most everything, if you right-click on my computer and select properties - the page should identify it as a 64 bit system (or 32)
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