At 10:15 PM -0800 1/23/2003, Robert P. McAllister wrote: >Clark Martin wrote: >> At 8:12 PM -0800 1/22/2003, Robert P. McAllister wrote: > >> I have a couple of 7200s each with a single 128M DIMM in it, no problems. >> >>>When my 7500 was a 7200/120 it ran fine with a 128MB FPM DIMM installed. >>>It's best to use DIMMs with identical specs. >> >> >> >> There is no particular reason to use DIMMs with identical specs I >> know of. The 7200 doesn't interleave memory. >> >> > >Off the top of my head a few reasons to use same-spec DIMMs: different >refresh rates don't always mix well, especially with an upgrade card >installed; using slower 70ns DIMMs with faster 60ns (or either with 50ns >if you can find them) defeats the faster RAM since it will all be held >to the slowest; and though you correctly point out the 7200 won't >interleave memory, if the person wishes to upgrade the logic board and >interleave the RAM on it he'll be able to do so if it's matching.
Except that with 7200 and company it doesn't use the fastest or the slowest speeds, the motherboard accesses the memory at whatever speed it's designed to. The 7200 requires 70nS DIMMs, so if you put in faster memory, it's still accessed the same as a 70nS DIMM. Unlike latter DIMMS this type doesn't report it's speed. -- Clark Martin Redwood City, CA, USA Macintosh / Internet Consulting [EMAIL PROTECTED] "I'm a designated driver on the Information Super Highway" -- 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
