Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!mips!spool.mu.edu!news.nd.edu!mentor.cc.purdue.edu!purdue!haven!mimsy!dftsrv!heawk1!hoepfner From: hoepfner@heawk1.gsfc.nasa.gov (Patrick Hoepfner) Newsgroups: comp.sys.mac.hardware Subject: Re: System 7.0 and Additional RAM Message-ID: Date: 20 Apr 91 01:21:27 GMT References: <1991Apr8.034446.14836@murdoch.acc.Virginia.EDU> Sender: news@dftsrv.gsfc.nasa.gov Distribution: usa Lines: 22 hoepfner@heawk1.gsfc.nasa.gov (Patrick Hoepfner) writes: >mil@mendel.acc.Virginia.EDU (Maria I. Lasaga) writes: >>Given the virtual memory capacities of system 7.0, will there be any >>need to purchase additional RAM? If not, will it even be advantageous >>to have more RAM rather than less? > I have heard that Apple suggests that so that performance doesn't >slow down too much, you should only double your current RAM. That is >for those with 4MB, VM will bring you up to 8MB with out too much of >a performance hit. I REALLY hate folling up on my screwups but the formula for the Maximum RAM (real and virtual) for a Mac is total memory minus 1MB for each NuBus or PDS card. What this means is... For a non 32bit clean machine, (say a Mac II) with 6 NuBus cards is 16MB - 6MB(1 per board) = 10MB total memory address space available. Sorry about the screw up... hoepfner@heasfs.gsfc.nasa.gov