What's the fastest memory my laptop can accept?

Hi guys,

I have a laptop, TOSHIBA Satellite 5200 with the following spec:

CPU: Intel P4 m 2.0GHz

Memory: 1x512MB pc 2100

HDD: 60G
......

Recently I want to upgrade my memory to 1GB ( 2X512), and I found out that the laptop can take slightly faster PC2700 memory 512M from my friend's laptop.

So the questions are:

1. Two DIMMs should make the most out of DDR memory, right? Dual Channel must be faster than my current 1 DIMM, right?

2.what's the fastest memory my laptop can accept without any compatability problem?

Is it wasting money to get any memory faster than PC2700 or I should get PC3200 to make my whole system faster?


Thanks everyone!
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More about what fastest memory laptop accept
  1. Quote:
    ..
    1. Two DIMMs should make the most out of DDR memory, right?

    Yes, unless your laptop can hold 4 SO-DIMMs.
    Quote:

    Dual Channel must be faster than my current 1 DIMM, right?
    faster throughput, yes, but it is unlikely that your laptop supports dual channel mode.
    Quote:

    2.what's the fastest memory my laptop can accept without any compatability problem?

    You will need to get that info from Toshiba.
    Quote:

    Is it wasting money to get any memory faster than PC2700 or I should get PC3200 to make my whole system faster?

    It depends. The laptop will run ALL the memory at the speed of the slowest memory SO-DIMM. Going from your current PC2100 speed to PC3200 speed is a big jump. Going from PC2100 to PC2700 is a smaller jump. Here's what I would do:
    1) If your laptop can run the memory at PC3200 (DDR-400) speed, I would buy 1 new 1GB PC3200 SO-DIMM, and sell the old 512MB PC2100 SO-DIMM.
    2) If your laptop's maximum memory speed is PC2100 or PC2700, I would just buy 1 new 1GB SO-DIMM (or 1 new 512MB SO-DIMM) and add that to the computer. Remember that faster memory will run OK at slower speeds, so buy PC3200 speed SO-DIMMs unless the slower SO-DIMMs are much cheaper.
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