[RESOLVED] ram

can you mix 133 bus ram with 100 bus ram for a 66 bus celeron

According to the specs you can but it will only run at the slower speed.
On occasion i have come across some errors with mixing of ram (ie pc100 and pc133)

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"I get by with a little help from my friends." The Beatles

Yes you definitely risk instability when mixing memory.I have seen some motherboards most notably the Gigabyte GA-6VX7-4X have timing problems with a celeron and 133 memory.this board sets the memory speed to "auto" by default and it apparently does not allocate correctly but a tweak in the bios changing the auto to the correct speed which in this case would be 66 takes away the problems.I have seen Exception errors and GPF's when this happened.

ive seen it work and not work ... my old epox board is using pc 133 and pc 100 and it has been working fine ... so it all depends .. i would say try it and if its unstable remove the pc133

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1,2,3,4,5,6,7 all good children go to heaven

IF it works your system will run all the ram at 100mhz... But I have seen a lot of blue screens that way...

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It's a dog eat dog world out there and I'm wearing milk bone underwear.

Ram size and speed seems to be a trial and error thing. If you go by the documentation, it shouldn't matter what speed you install as long as it is at least as fast as the CPU requires, and the memory speed is reduced to the slowest chip. Reality though is a completely different thing. It used to be that if the chips were different sizes, the largest one had to be first, but I have an Intel 815 motherboard with 3 sockets. I have a 64MB PC133 chip in the first, the second is empty and a 128MB PC133 chip in the last. Strangely, this is the only way the board will run with these particular chips. A different 128MB chip I tried in it wouldn't run at all!