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Old 09-21-2004, 07:40 PM   #1
Registered: Jun 2004
Location: Denton
Distribution: debian, freebsd
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pc100/133 hybrid?

This is more of a general hardware post rather than a linux-specific one... I was just wondering if there was a such thing as a hybrid pc100/133 mem module. i had 384 mb in my machine, and today I brought home another 256mb stick of crucial pc133. I put the new stick in (accidentally) with the other 128 stick and it refused to boot... I took them out and realized that they were different speeds and thought "no wonder this doesn't work". so I put the 256 sticks in together and it works fine.

I just thought it was kinda wierd that the 256 stick worked with both a 100 and 133 stick. also the first three letters of the serial number are 'hyb' so ... if someone could either confirm or correct me that would be lovely.

Old 09-21-2004, 10:18 PM   #2
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Registered: Feb 2003
Location: N'rn WI -- USA
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A 133 stick should have run fine on a motherboard set to 100. Underclocking has never been a problem, AFAIK. Maybe the sticks weren't seated properly?
Old 09-22-2004, 12:05 AM   #3
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Some picky motherboards designed for PC100 RAM chips will not work with PC133. I have one, an Elite (ECS) P3 board. It works flawlessly with PC100 RAM but put a PC133 stick in there and it just sits there and beeps.

As for "hybrid" PC100/PC133 RAM, I have never heard of it. Since the difference between PC100 and PC133 involves only designed speed and timings I suppose it is possible it exists though.



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