John Ruschmeyer <[EMAIL PROTECTED]> writes: > >Oh, the price of upgrading... > >I recently got it into my head that I wanted to replace my PowerCenter >150 with a 7500, figuring I'd move the G3 upgrade and memory over. > >The PowerCenter had 112mb of RAM- an unknown 16mb DIMM and 3 32mb DIMMS >purchased on a special from ComputerGeeks. The 16mb DIMM went over with >no difficulty; it's the 32mb ones that are the problem- they physically >won't fit the 7500 slots! > >The 3 in question were apparently made for Compaq and have Compaq part >numbers. They were sold to me as 168-pin FPM DIMMS with no warranty of >usability in a PowerMac or clone. > >In the PowerCenter, they fit in the sockets and ran for over a year with >no obvious problems. In the 7500, however, they would not seat properly >in the DIMM sockets. > >If I compare the 16mb DIMM with one of them, however, I can see why. >Holding the DIMMS side by side, I can see that one of the guide notches >(the one between the longer sections of pins) is offset from its >counterpart on the other DIMM. Interestingly, it is not completely >offset, there is a small overlap (apparently enough of one to let it sit >in the DIMM sockets of the PowerCenter). > >So I'm wondering... Are there any RAM experts out there who have seen >this before? What kind of RAM do I have, anyway? It must be close to >correct since the PowerCenter liked it (IIRC, putting the wrong memory >in a Catalyst board is pretty much fatal.), but still...
If the memory has Compaq part numbers then it's probably PC memory of some sort. Beyond that, I can't help you but you might try Compaq's website and see if you can find out anything about those part numbers. Frankly, I wouldn't bother. Memory cards are keyed differently for a reason. >Also, anybody know any vendors who might swap me this memory toward the >cost of some of the correct memory? Unless you already have a good relationship with a vendor, I wouldn't bother. You can get a brand new 128MB stick of memory for under $25 (at OWC or check out www.ramseeker.com). 32MB used memory sticks aren't really worth any vendor's time or money anymore--you'd probably pay more to ship them than what you'd get for them (assuming you could get anything at all for them). I'd consider tossing your 16MB stick too, as it's probably the older (slower) 70 or 80ns memory. -Jeff [EMAIL PROTECTED] -- "You can't brew a premium lager with a kool-aid mentality." --Harold Green in _The_Red_Green_Show_ -- 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
