On Friday 22 July 2011 12:08:50 kristen wrote: > On Friday 22 July 2011 11:28:47 Gary O'Brien wrote: > > Hi, all: > > > > As far as I can tell, this item: > > > > ACP-EP Memory 512MB PC133 168-PIN SDRAM DIMM > > > > should work just fine in my DA 466. However, when I install it (3x512) > > and try to boot, nothing happens - no chimes with trouble codes, > > nothing. > > > > Have I purchased the correct RAM for this machine? > > > > Thanks in advance, > > Gary > > This memory as I have found with google searches, is an ECC memory. If so > then no it will not work as G4's are not compatible with ECC type memory. > (not that I have ever heard of) This kind of memory is used in high end > work stations and servers. > > Check the specs that came with your memory and see if it's Error Correcting > or not > > Kristen To add on, I see another site stating this memory is NOT ECC. Better check it out. http://www.provantage.com/acp-ep-memory-aa32c6464-pc133~7ACPM060.htm Also I see that this memory uses interleaving while the specs for the Digital Audio G4 states the use of NON-interleaved memory. ttp://www.everymac.com/systems/apple/powermac_g4/stats/powermac_g4_466.html I still suspect the memory is not compatible. I suppose we would have to know exactly what kind and brand of memory you have purchased. Kristen