PC133 or PC100 RAM?

By jlrka
Aug 20, 2009
  1. I am upgrading a Demension 4300 w/ a 1.4gig P4 actual speed is 1395.
    Crucial says it uses PC133 which it now has. BIOS says the bus speed is 100mz.
    IF i put in PC100 will it work at 100 or 133 or not at all?
  2. red1776

    red1776 Omnipotent Ruler of the Universe Posts: 5,224   +164

    Hi jlrka,
    if you put ram of mixed speeds in the same machine, say 100 and 133. it will all run at the speed of the slowest module (100Mhz) in this case. unless the compatibility of the motherboard has other caveats. check the manufacturers ram support list for that.
  3. jlrka

    jlrka TS Rookie Topic Starter

    I wouldn't mix them. Just going by the bus speed would 100 work at 100?
    Beside, would you believe anything that Dell said.
    I got this computer at a thrift store-$5.35 That's about the going price for a Dell.
    Mainly because of their support - or lack thereof.
  4. red1776

    red1776 Omnipotent Ruler of the Universe Posts: 5,224   +164

    LOL good point. oh i missed your question sorry, it would work at the speed of the ram you install
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