Thanks David,
I ordered the exact same standard as it required.Here's what the seller described, http://cgi.ebay.com/NEW-2GB-Apple-iMac-G5-1-9GHz-17-iSight-Memory-RAM_W0QQitemZ350241793689QQcmdZViewItemQ... It's a Kingston for iMac533 model. Will it depend on the operation system?Mine's still in Tiger