OK. Thanks for this, Peter. Impression I get from what you say is that having two processors is almost totally useless (except for Photoshop - but I am happy with the speed of things on my 360 MHz upgraded 7600). So, is this right: if I get one of these dual processor 9600's I can replace with a single processor upgrade of good mHZ (like say 350 or more) and all will work? Like, what about my present G3/G4 PowerLogic upgrade card which works wonderfully in a 7600?
Must say, I am puzzled as to why - if there are so few apps that can take advantage of twin processors - anyone would want one (the promise of something that did not eventuate?)? I take it that if the twins are made up of 2 x 200's the effective speed for most apps is 200 - so upgrading to more like a single 400 is effective doubling in practical terms. > From: [EMAIL PROTECTED] > Message-ID: <[EMAIL PROTECTED]> > Date: Mon, 23 Jun 2003 00:12:03 EDT > Subject: Re: 9600 that have dual processors > > > In a message dated 6/22/03 8:41:05 PM, [EMAIL PROTECTED] writes: > > << > Can only very few programs take advantage of the two processors? >>> > > Primarily Photoshop. > > The MacOS knows that there are two processors installed, but it cannot itself > use these to simultaneously schedule operations. > > The MacOS was designed for neither multi-tasking (can be done with one or > more processors) nor multi-processing (requires two or more processors). > > (2, 4, 6, and more-way PPC cards were made my IBM and a few others, but these > cards were utilized in proprietary systems, using a proprietary operating > system). > > (My former employer made a great many multiprocessors, including 16-way IBM > System/390-compatible mainframes. The processing power of such a machine, > especially coupled with an operating system which can take advantage of > symmetric > multiprocessing, such as our version of Unix, is truly awesome. In fact, Sun > Microsystems ripped off our multiprocessor support code and incorporated it > into > their version of Unix). > > >>> > Can one control what one gives to each processor. >>> > > The MacOS can't, but the application (Photoshop) can. > > >>> > If one were to upgrade can one just upgrade one of the processors or is this > idea founded on a mistake? Do the dual processors have separate slots? Can > they both be > upgraded? 2 x XLR-8 say? >>> > > A 9600/180MP and a 9600/200MP both share the same Tsunami-type motherboard. > > There is only one processor slot. > > NewerTech made a so-called 400 MHz MP card (really, two 200 MHz 604e > processors on one card) and a so-called 450 MHz MP card (really, two 225 MHz > 604e > processors on one card). > > These work fine in just about any PCI Mac which accepts a standard (i.e., > non-Kansas) CPU card. > > I have a 9600/200MP. It works much better when a G3 card replaces its MP card. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> 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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
