I've scrounged some more RAM for my 7300-G3/400. Two 16MB EDO DIMM sticks.
I also got a whole heap of other DIMMs which wouldn't fit, which has been educational. What I've learned (some of you may already know this): This era of PowerMac (7300 and 7500 & 7600*) wants FP-DRAM - i.e., it doesn't require or utilise EDO. However, it will work fine with EDO and that is easier to get. Reference: http://www.macgurus.com/products/motherboards/mbppc7300.php It has 8 DIMM slots, which means it must have buffered memory; this allows so many slots. Most Pentium III class PCs use unbuffered DIMMs, which are marginally faster, but mean only 3 or 4 slots can be used. (Most recent DIMM-based PCs and Macs also use SDRAM, not FP-DRAM or EDO. In principle, SDRAM should work in an old Mac in the slower old-fashioned mode, but AFAIK it only exists in 3.3V form, not the 5V which Macs require.) It also wants 5V modules, and most of the ones I was given are 3V. How to tell: http://home.cfl.rr.com/bjp/Dimm.htm This means I've got enough for interleaving my RAM. Some more research told me how to do this: http://www.megamemory.com/MacMemory/Apple/PowerMacSeries/7300.html Hope this is informative or educational for some. But... When I interleave the RAM, most of the time, the Mac won't boot or boots then quickly crashes. If I insert my single remaining 5V DIMM, a 32MB one, it gets more reliable, but not by much. The machine will no longer boot OS 9 reliably at all, tending to stop before the MacOS logo with a Bus Error 11. Does adding one unpaired DIMM disable interleaving for all of them? Does anyone have interleaved RAM working? Does it work with OS X, which is notoriously fussy about RAM? If someone does have it working and finds it stable with OS X, is it noticeably faster? -- Liam Proven � http://welcome.to/liamsweb * May possibly also apply to 8200, 8500 and 9500; I wasn't specifically looking. -- Unsupported OS X is sponsored by <http://lowendmac.com/> Support Low End Mac <http://lowendmac.com/lists/support.html> Unsupported OS X list info <http://lowendmac.com/lists/unsupported.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive <http://www.mail-archive.com/unsupportedosx%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
