667 to replace 666 memory.

Hello, A few years ago I bought a Compaq CQ60-211DX laptop and I always wanted to upgrade the RAM. I looked around online and found what I thought was the right product (CORSAIR 2GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model VS2GSDS667D2). But when I installed it the only light on the laptop case that lit up was the power light.

When I was putting the old RAM back in I noticed the label on my original RAM said it was 666 speed, but the packaging on my new RAM states that it is 667. Is there a way to make my new RAM work, or should I RMA it?

If RMA is my only recourse, what RAM should I buy?

Thanks a lot!
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  1. Best answer
    Welcome to Tom's Forums! :)

    666 vs 667 or 1066 vs 1067 is a rounding number and means nothing ±1.

    My initial assumption is that your Corsair is not compatible with either 'your mixture' or 'your notebook' RAM. You can remove your old RAM and only try the new RAM to see if Corsair will work. Also, you can try your old RAM {by itself} in the second DIMM slot to see if the slot is itself bad.

    Next you need to verify your current RAM {SPD tab} via CPUz -

    Finally, choose the 'correct' matching Speed, CAS, and Voltage from the Crucial {tested} list -

    Good Luck!
  2. 666 vs. 667 was just a distinction made by certain Memory manufacturers to a) confuse the public b) distringuish themselves from competitors and c) be a little anal about the accuracy of memory frequency scaling.

    Technically, 666/667MHz memory is 666.6666.....MHz, so some rounded down to 666, others rounded up to 667. Its should be the same.

    What might be causing the problem is the voltage, timings, or density the memory uses. I can't tell you what your Compaq wants, so I can't tell you exactly what might be wrong (it could be the memory controller chip too).

    My only suggestion is to return that memory for a refund if you can, and do a google search for "CQ60-211DX memory". You'll find tons of e-tailers offering memory that is guaranteed to be compatible.
  3. It's pretty much the same memory mate. "1" number is affected by the rounding. It doesn't mean any decrease in speed.

    Do what jaquith recommended, verify your current ram with CPUz.

    But there's no need to worry about your ram, it's good =)
  4. Best answer selected by minion287.
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