Memory compatibility with ASUS Mobo

By foxdelta
Aug 6, 2008
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  1. Hi there,

    Can anyone give me advice on DDR memory compatibility with my ASUS P4P800S-X motherboard please?

    I currently have 1 GB of PC2100 266mhz memory in my system but I want to upgrade. I can only afford a stick of 1GB Kingston DDR400 PC3200 serial number KVR400X64C3A/1G which (I hope) will work on its own in this mobo. I want to know if I could mix the 2 sorts of memory (DDR400 & 266Mhz) to give me 1.5 GB of memory. Next month i will buy another 1GB stick and replace the 512MB PC2100 so this is only a short -term problem.

    Thanks for the advice.
  2. nickc

    nickc TechSpot Paladin Posts: 1,623

    check the compatible list on ASUS site.
  3. foxdelta

    foxdelta Newcomer, in training Topic Starter Posts: 47

    Finally got 2 sticks of the Kingston 1GB PC3200 DDR400 running in my machine and what a difference 2GB makes! Of interest, the mixed RAM did work only that the speed was recorded for both at 266mhz.

    Thanks again.
  4. captaincranky

    captaincranky TechSpot Addict Posts: 10,012   +713

    Any machine will always clock the faster RAM down to match the speed of the slowest DIMM.
  5. Tedster

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

    ASUS boards are extremely picky on ram. Stick to the manufacturer's recommendations in the mobo book.
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