iMac (Flat Panel): Apple System Profiler and Memory
This document explains why Apple System Profiler reports PC-133 memory as PC-100.
Products Affected
Mac OS 9.2, Mac OS X 10.1, Mac OS X 10.0, iMac
Symptom
PC-133 memory is seen as PC-100 in the Built-in memory section of Apple System Profiler in Mac OS X 10.1 and Mac OS 9.
Solution
There is nothing wrong with the memory. While the iMac (Flat Panel) computer comes with PC-133 memory, the memory bus is 100 MHz, which causes Apple System Profiler to report the memory as PC-100.
You can verify the correct speed and latency of SDRAM installed in the factory slot by starting up the computer using Apple Hardware Test.
1. Restart your computer while holding down the C key until the "Loading" icon appears, then release the C key.
2. Click the Hardware Profile tab.
3. Under the Memory section in the upper right corner of the Hardware Profile, select the Memory slot you wish to profile. Memory #1 is the user-accessible slot. Memory #2 is the factory installed slot.