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It should work as Callandor suggested within certain limitations. It would be easier to tell you a more accurate answer if we knew the motherboard model. I know that socket 370 Intel boards that had the 810 chipsets would not work with pc133, so there is a possibility it won't work.<br />
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Will it hurt the system? usually not , but there is always a risk with so little info to go on.
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It should work as Callandor suggested within certain limitations. It would be easier to tell you a more accurate answer if we knew the motherboard model. I know that socket 370 Intel boards that had the 810 chipsets would not work with pc133, so there is a possibility it won't work.

Will it hurt the system? usually not , but there is always a risk with so little info to go on.

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Hi<br />
The memory will work at the speed of the lowest memory module in this case 100mhz
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Hi
The memory will work at the speed of the lowest memory module in this case 100mhz

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Is pc100 interchangeable with pc133 ram? &nbsp;This older machine has 64 pc100, I have a 128 of PC133, can I use it. &nbsp;Although there is another slot it doesn't recognize the second stick of 64 pc100, is this slot dead? &nbsp;To try the 133, is there a danger to hurt the system?
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Is pc100 interchangeable with pc133 ram?  This older machine has 64 pc100, I have a 128 of PC133, can I use it.  Although there is another slot it doesn't recognize the second stick of 64 pc100, is this slot dead?  To try the 133, is there a danger to hurt the system?

133 and 100 pc

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