Memory does not work...

This memory I purchased for my G4 PowerMac (audio) 533mhz:

3x512mb 133mhz SDRAM:

512MB PC133 SDRAM 133MHz 512 MB PC 133 DESKTOP RAM MEMO - eBay (item 140267640239 end time Oct-16-08 02:43:01 PDT)

System runs as if the memory does not exist. When I put in 128mb with one of the 512mb sticks, system reports only 128mb of memory installed. When just the 512mb are installed, system gives a different beep and does not start past the post.

Not compatible is your problem. Look at the specs - see that high density? Most PC memory is high density. Apple Mac use low density and will not recognise that memory. This is the link for their low density:-

NEW 512MB PC133 SDRAM 512 PC 133 LOW DENSITY 133MHZ RAM - eBay (item 140271328261 end time Oct-29-08 01:32:14 PDT)

Pop them an email, tell them what you purchased and can you echange, plus the difference, for modules to suit and Apple Mac.

Thank you

very much. I'll go ahead and do a trade.