iMac 333, Aluminum Or Copper?

NoBeige.Com 5/20 posted a reader report claiming to have a copper (IBM) 333 MHz G3 CPU. As stated in Macs Only! quick review of its iMac 333 several weeks ago, the CPU is an aluminum one from Motorola. Subsequently, yesterday several NoBeige readers wrote that they had aluminum CPUs in their Rev.Ds. It's possible that there is a mixture of CPUs being used by Apple. NoBeige is running a poll.