As well you can actually use PC133. Non-ECC --- here is another link to the Mackie site/
Joe gave you the link to the Database here @ d8b forum dot com...
http://www.mackie.com/support/documents/D8b_Memory_Upgrade.pdfand here...
http://www.mackie.com/support/FAQ/d8b.html#6Hope this helps,
Michael
PS: Lot of online places sell this memory and it is not really expensive, I would order twice what you need and have it as a back up if it isn't too expensive and it would not hurt... some trouble has been attributed to bad RAM so it is good to have some in the "drawer" so to speak, just my humble opinion