here's another challenge... getting SDRAM DIMMs working in a EDO DIMM based Powermac...
----- Original Message ----- From: "Greg Shafritz" <[EMAIL PROTECTED]> To: "PCI PowerMacs" <[EMAIL PROTECTED]> Sent: Saturday, March 06, 2004 8:35 AM Subject: [PCI] Once-removed (exotic) question re. EDO SIMMS in older Macs > Here's a good one to ponder: > > I've been wondering for a long time about whether one can successfully use > EDO SIMMs (Extended Data Out) in a 1st generation PPC Mac. > I know that EDO SIMMs will function in a 6100, 7100 or 8100, > but their EDO capability is not utilized by the memory controller, > so the benefits of EDO are not achieved. > > HOWEVER: (and this is a BIG point) > > I've discovered that there IS a 1st-generation PowerMac that has > an EDO-capable memory controller!!!! > It's the WGS 9150 (Apple Workgroup Server 9150). > It was the first Mac of any kind to have an EDO controller. > > This brings up two obvious questions. > > 1. Can EDO SIMMs can be used in a WGS 9150, with their > EDO capabilities FULLY FUNCTIONAL? > > 2. The WGS 9150 has 8 MB of system RAM soldered to the motherboard. > These RAM chips look like they are NON-EDO. > So even though the 9150's memory controller is EDO-capable, > won't the 8 MB of soldered mainboard RAM make the EDO feature > useless? (i.e. it's kind of like using a SCSI-1 hard drive on a SCSI-2 > bus... every device on the SCSI-2 bus will be forced to run at SCSI-1 > speeds because the SCSI-1 device creates a bottleneck). > > Lastly, if the EDO feature is non-functional because of the non-EDO RAM on > the mainboard, can I REPLACE the mainboard RAM with EDO chips and thus make > the 9150's EDO feature fully functional??? > > This is the kind of thing that should get a nice debate going on the list - > let's have some fun tackling this one during the weekend. > > I've got my soldering iron ready! > > Jeff Walther, are you out there? > Any other takers? > > TIA! > > Greg Shafritz > > > > -- > 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 -- 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
