What is the difference between PC100 and PC133 memory?
• PC100 is designed to run at 100 mhz, but it actually should run at speeds up to 125 mhz • PC133 is designed to run at 133 mhz, but should run at speeds up to 142 mhz • There is no real physical difference between PC100 and PC133: both have 168-pins and can be either single-sided or double-sided • The big difference is compatibility: PC133 can be run at 66 mhz, 100 mhz, or 133 mhz (or anything in between), but newer PC133 is built using high density memory chips • Older motherboards will not recognize high density RAM properly- either it will be recognized at half its capacity (example: 128 meg seen as 64 meg), or it won’t be recognized at all
