Can you mix pc66 and pc100 sodimms?

[Kenazo]

I've got a laptop running a 32mb pc100 sodimm, and I was wondering if I could add a pc66 32mb sodimm. Does this cause conflict?

 

[Trashman]

<< Does this cause conflict? >>


YES....you can not go "down"....if your system is runnin at 100MHz and you add 66MHz memory it won't work.
If you originally had PC66 in there and wanted to "add" PC100 memory, then it work, your PC100 will just run at 66MHz which is no problem.

 

[Kenazo]

Well it's a K6-2 433 chip in a laptop. I think it runs at 100 but I'm not sure....but if it is, then it won't work I guess..

 

[kumanchu]

uh, if its running at 433, its using pc66 ram unless amd had 1/3 multipliers on their mobile chips (which i highly doubt) so you really wouldn't be mixing. Not to mention that sodimms are like normal dimms in that they are overclockable to a certain extent. theoretically if you had a good pc66 sodimm it wouldn't have a problem running at pc100.

 

[SaigonK]

Right,
my father's PC at his garage is just a celeron 300a, he had 32meg of PC100 ram in it, when my sister upgraded i took her PC66 and threw it in just to get him up to 64meg total.
It ran fine, no hassles...in the future we ended up upgrading him to a single 128meg PC100 stick, but for the time it was rock solid and ran fine...

 

[Trashman]

SaigonK....thats because the Celeron 300 runs at 66MHz, so PC66 memory should work fine.....runnin PC66 memory at 100MHz is not unheard of, depends on quality of memory.

 

[yomega]

I suppose that in theory the laptop could be using a 95Mhz fsb. I know that some desktop K6-2s do this but I don't know about the mobile ones.

 

[Damascus]

Running PC66 at 100mhz is overclocking basically.