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Can you use PC-100 AND PC-133 in same computer?
BigJim Nov-20-01 06:28 PM
Can you use PC-100 and PC-133 ram in the same computer? How can you tell if the ram is PC-100 if there is no sticker on it? I have a stick of 128mb and a stick of 256mb, is there a specific arrangement when putting them in (biggest to smallest)? Thanks.

1. RE: Can you use PC-100 AND PC-133 in same computer?
lbyard Nov-20-01 08:32 PM
In response to message 0
>Can you use PC-100 and PC-133 ram in the same computer?

Yes, you should be able to. PC133 memory is downward compatible with PC100, PC66, and PC33 memory.

>How can you tell if the ram is PC-100 if there is no sticker on it?

A good memory ID guide can be found at http://www.dewassoc.com/performance/memory/how_to_id_pc133.htm

>… is there a specific arrangement when putting them in (biggest to smallest)?

No, but I usually put the largest one first. The largest memory I have is usually the newest and the break between modules won’t happen as often. That is, most of the time programs etc. will be using the first module.

If I had, say, a 256 MByte PC133 module, a 128 MByte PC100 memory module, and my computer supported PC133 memory, I would not install the PC100 module and run the bus a 133 MHZ instead of the 100 MHz required to support PC100 memory. It will run faster that way. I would guess that it would run faster with one 128 MByte PC133 module instead one 128 PC133 and 128 MByte PC100. Larry


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