ok if your using pc133 ram right now you need to make sure that your mobo could support pc3200, that is a huge jump.

Im not sure what pc133 is, but pc3200 is dd400.
if you get pc3200 and your cumputer cant support it, im not sure if it will just reject them, or if it will make the RAM run at the fastest speed that the mobo can support, which may be pc133. If your mobo doesnt support pc3200 then your wasting a bunch of money on good expensive ram when you would do better with some cheaper ram. I hope you read this before you order your ram.

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