>> RE; I agree with all that he said with the exception of: sometimes >> when playing back video such as quicktime or useing DVD playback I >> found VM would cause the picture to skip, so my opinion is virtual >> memory is good for most things, but if you have video troubles try >> turning it off for that.. best wishes >> When should Virtual memory be turned on? > > Since sometime in 8.5, all the time. The default is 1 meg more than > your > real RAM. You should also get as much RAM as possible. Prices are dirt > cheap, so fill it up. > > The reason to use VM even when you have lots of RAM has to do with the > memory used by applications is used. The code for an application must > be > loaded into memory for it to execute. If VM is turned on then the > system > can use a feature called memory mapped I/O to make loading the > applications executable code into memory much more efficient and use > less > memory. You'll notice a message when you view the Memory panel of the > Get > Info window that the application will use more memory if VM is turned > off. > > So, turn it on, leave it on and forget about it. :-) > > ...Duane