In article , Ryan Underwood wrote:
"Michele Smith" writes:
- I have heard anecdotes that using e.g. PC133 memory in a PC66 motherboard
will fail because the refresh interval on the PC66 memory controller is much
longer than that on the PC133 controller. If the RAM was designed with a
shorter refresh interval in mind, the slower refresh interval may allow
things to fall out of RAM.

Another thing to watch out for is that the memory may be 5 volt, while AFIK
all 100 and 133 RAM is 3.3 volt. It's easy to tell, the SIMMs look the same,
but one of the notches is in a slightly different place.

Geoff.


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Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
IL Voice: (077)-424-1667 IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838
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