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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > 133 memory in a 100 imac

133 memory in a 100 imac
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jparisi
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May 28, 2003, 11:43 AM
 
Can I do this or is it a no-no?
     
OldManMac
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May 28, 2003, 11:54 AM
 
Yes, it will just run at the 100Mhz bus speed.
Why is there always money for war, but none for education?
     
bradoesch
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May 28, 2003, 07:30 PM
 
I have 133 MHz SDRAM in my 100 MHz bus iMac and it's working fine. I have read about 133 MHz RAM that won't slow down to 66 MHz (or maybe it was 100 MHz?), so you might want to make sure you can return it if doesn't work.
     
drcarl
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May 29, 2003, 02:06 AM
 
I think Apple actually recommends using 133 on 100Mhz bus iMacs (at least the FP iMacs).
--Dr. Carl--
iMac 800MHz 17"FP 80G HD 1G RAM
PowerBook G4 1.33GHz 15" 60G HD 768M RAM
     
tooki
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May 31, 2003, 03:13 PM
 
The speed rating (PC133/100/66) is a maximum. It will function fine at the lower speed.

The only consideration is that at the same time clock speeds increased, so did chip densities, so some high-capacity modules aren't properly recognized by older computers. (E.g. some PC100 Macs like my blue G3 can't use 512MB modules.)

tooki
     
   
 
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