System only recognizes 4 out of 8GB of ram

Hello, I have 8GB of Kingston ram put into my system but it only reads 4GB, sometimes this can be changed when I remove and reinsert the ram, but after awhile it just goes back down to 4GB. Anyone out there with a similar issue? Anyone know how to fix it?

7 answers Last reply
More about system recognizes
  1. what operating system?
  2. I'm using Windows 7 Ultimate 64bit
  3. mobo, bios rev ??
  4. and the config of the RAM?

    2 x4

    4 x2?
  5. Mobo = Asus P8P67
    BIOS = American Megatrends Inc, 0402
    Ram = 4 x 2GB
    CPU = Intel Core i5- 2500
    GFX = Nvidia GeForce GTX 460

    Regarding the ram, I have switched them in the different slots in all the possible combinations, so the RAM are fine. As well the mobo was the one Asus made a recall for due to some issues with their USB 2 ports I believe.

  6. the memory controller is on the processor , not the mb, so unless there's a physical problem with the RAM slot
    you either have faulty RAM [ which does not appear to be the case ]

    or you have a processor thats only intermittently working

    Or you have bad mb drivers . Did you install all the drivers from the disk?

    Or you need to try an updated BIOS
  7. Alright i'll check out those suggestions

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