RAM not working

Posted on 2011-05-08
Last Modified: 2012-08-13
I have an ASUS P5P43TD PRO motherboard.  It has four slots, two blue and two white.  It originally had two 2gb sticks of Kingston KVR 133D3N9/2G ( in it.  Online, it says the motherboard can have a maximum of 16GB.  I purchased four 4gb Crucial CT2KIT51264BA1339 (  When I placed all four sticks in, the server started beeping and not booting at all.  Then I removed two sticks from both white slots, and it booted up fine.  I tried it again, and still the same issue.

Any ideas why or if I'm doing something wrong?

DDR3 4GB PC3 10600 1333MHz 240pin
Question by:cmb991
    LVL 1

    Author Comment

    I also noticed that if I put three of the Crucial sticks in (two in blue and one in white) and also put one of the old Kingston KVR133D3N9/2G in the other white, it works fine two.  
    LVL 91

    Accepted Solution

    test all the sticks per pair first
    i believe this ram is not on the QVL :
    LVL 1

    Author Comment

    They all work fine in pairs no matter what combination
    LVL 17

    Assisted Solution

    Asus tends to be very picky about the memory, if the sticks you have are not in the approved list from Asus  you're in trouble.
    I had a similar problem with an Asus MoBo, the four sticks worked well in pairs, but if I tried to use the four the system won't boot.
    A possible solution is messing with the BIOS settings of the RAM, decrease speed & increase voltage but there's not a recepy that I'm aware of, so you'll have to test with different settings.
    LVL 1

    Author Closing Comment

    Thanks, time to send it back and get an approved one!!

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