posted 12-09- 06:18 PM               

You can mix different speeds of RAM on a machine, but the slowest has to be in the first memory bank. So, if your machine already has PC100, you can insert a PC133 stick in the second slot and everything will work fine.

posted 12-09- 06:53 PM               

PC66 and above is SDRAM and anything below that is EDO or DRAM. And of course way back when they had other types of RAM for the 8086's, Comadors and acient Macs that my school still uses.

posted 12-10- 02:17 AM               

How new the computer is can mess up the whole picture.
The fastest CPU's run on either a 100MHZ or 133 MHZ bus depending on the clock speed of the CPU's. On some of the newer computers the mfg's are putting in MB's with a 133 MHZ bus (which will also run at 100). Depending on whether the CPU requires a 133 or 100 MHZ bus they set the bus speed as required. So the computer could have a 133MHZ capable MB, and 100MHZ SDRAM.

They do have to make things dificult, don't they.

Also, 100MHZ ram will run on most 66MHZ boards (LX or TX chipset)if the bios has been updated. 133 is exactly the opposite, it probably won't run on a LX or TX chipset MB. However, it will run at 66MHZ IF you have it on a 100MHZ capapble MB. The machine I'm using to write this has a MB that can support a 100MHZ bus (BX chipset) a 64MB PC100 stick, a 64MB PC133 stick, and the bus speed is set for 66MHZ since it has a Celeron in it. The machine runs without any problems.

Talk about a topic that's about as clear as mud

posted 12-10- 02:13 PM               

You need a stick of PC100 SDRAM. As long as your machines not an HP, any good quality memory will work. Micron makes good ram at reasonable prices. If prices are high in your area, go to www.pricewatch.com and see if you can get what you need there.