home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!stanford.edu!snorkelwacker.mit.edu!genome.wi.edu!lstein
- From: lstein@genome.wi.edu (Lincoln Stein)
- Subject: Re: Acclerating a Mac II
- Message-ID: <1992Aug19.200128.23041@genome.wi.edu>
- Sender: news@genome.wi.edu (USENET News System)
- Organization: Whitehead Institute for Biomedical Research
- References: <cerovse.714244236@copper>
- Date: Wed, 19 Aug 1992 20:01:28 GMT
- Lines: 29
-
- >
- > Also, can anyone tell me the difference between DayStar PowerCaches
- > and PowerCards? There is an ad in MacWorld for a sale on the latter,
- > 40MHz '030 for the price of the PCache 33MHz '030, so I'm wondering
- > what the cache here is... Also, are there other brands of reasonably
- > cheap but effective accelerators out there for my II I should know of?
- >
-
- The PowerCard is the early version of the PowerCache. Unlike the
- PowerCache, the PowerCard is not "universal". There is a different
- model of PowerCard for each model Macintosh. With the PowerCache, you
- just buy a cheap ($45) adapter board to move the card from one model
- to another.
-
- The PowerCard uses smaller-capacity SRAM chips for its cache, so
- physically it is much larger, consisting of a two-card combination.
- The PowerCache is a single card.
-
- The PowerCard is incompatible with NuBus cards that act as bus
- masters. These include certain Quickdraw accelerator boards.
-
- Finally, the PowerCache is 10-20% faster than the PowerCard for any
- given clock speed because of improved caching code.
-
- ========================================================================
- Lincoln Stein
- lstein@genome.wi.edu Whitehead Institute, Cambridge, MA
- lstein@hstbme.mit.edu Brigham & Women's Hospital, Boston MA
- ========================================================================
-