Kris, I'd like to include your original message with my reply to better help in answering the question directly, but don't want to get a "no-no" email from Listmom. Anyway, what upgrade card are you using? Newer Tech has pretty stringent memory requirements. I also have ran into this problem with Powerlogix cards too, though. I have a brand new (well earlier this year) 128MB stick that would give me random kernel panics in X. Are you running X? In OS 9 it worked fine. I tried the routine that Powerlogix suggests (go to www.powerlogix.com FAQ's for more info) of switching DIMM locations to no avail. I also tried tweeking the backside cache speed, in case there was a conflict, and it helped but did not entirely solve the problem. I finally adjusted the bus speed down from 50 to 46.7 all the way to 40MHZ and it is about 98-99% stable with "Memory access" kernel panics once a week or so. So to get back to your original question, yes apparently G3/G4 upgrade cards require memory as fast as you can get. I bought mine @ 18004memory.com (before they had the disclaimer) so I wouldn't suggest buying from them. I would try http://www.store.yahoo.com/memx/powermac7500.html and purchase the 128MB "upgrade card" DIMM. It looks like it went down in price as it used to be $79.99!!! Also, X seems to be a lot more picky about RAM than 9 as I stated earlier. Hope this helps!! Mike
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