Hello, I recently upgraded my iMac RAM from 1GB to 4GB I purchased this: http://www.crucial.com/uk/store/partspecs.aspx?imodule=CT2KIT25664AC667 I took the 1GB RAM out and replaced with 2 x 2GB RAM Its showing as 4GB 333 MHz DDR2 SDRAM. Should it show as 667MHz? I just put the 1GB RAM I took out my computer into my Dad's iMac (Same as mine) and its showing as 667Mhz DDR2 SDRAM. His set up is now 2 x 1GB RAM Is my RAM faulty??