Using new RAM in an older machine

Can you stick PC133 ram in a machine intended for PC100?

I have an iMac DV and some PC133 RAM lying around (From a dead computer given to me) and wonder if I can upgrade the ram. Will there be any major adverse effects if I stick this ram in a machine built for PC100?

Thanks in advance!

#369446

Not saying go ahead or anything, but i just put 512 more of ddr pc3200, into a pc2700 slot, and its been working fine.

#369467

It's okay as long as the RAM is faster than what is supported by the processor (that's your case). It should be okay if the RAM is slower too, but will bottle-neck performance.

#369535

ooo i never knew higher speed was of no importance.....sweet....shame im not going to upgrade anything until next year when i build my new pc lol

#369556

Plugged it in a day ago, and worked like a charm. Thanks guys, what a load off my mind :-)

#372295

You can always use faster RAM than a board calls for, but you should never use slower RAM. Sometimes it will work and bottleneck, but sometimes the motherboard won't recognize it and it won't work at all.

#372311