Do those RAM-chips fit the Clamshell?
Yes.
They will also work in a tray loading iMac, with the caveat being that they will only be recognized as 256mb. That may be true of some Clamshells also-I don't remember and am feeling too lazy to look up the specifics. I know I have a 512mb stick for a total of 564mb(or is it 548mb?) in my FW Clamshell.
While we're at it, those same sticks will also work all Powerbooks from the original Wallstreet up to the last Titanium PB(although in the Lombard and earlier will read as 256mb). They will work in user-accessible slot of early iMac G4s.
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That's true and mostly I do - however, after a spell of buying cheap "Mac compatible" RAM from ebay that didn't work (from sellers who point blank refused to refund) I went to reputable companies, Maplin & Crucial Memory - guaranteed to work...and also empty your wallet![]()
Your mileage may very(considerably) but short of a completely dead stick I've yet to find any SD-RAM that wouldn't work in a Mac. The biggest issue I've run into is occasionally getting HD 256mb sticks that were advertised as LD-depending on the computer they will either read at half capacity or not at all.
The only time I've found it necessary to use a specialty supplier is with pre-G3 era Macs(although I've had good luck with 30 and 72 pin SIMMs salvaged from PCs). In those cases, OWC is my supplier of choice. And, of course, with older Powerbooks the odds of finding a memory card in a RAM junk box are slim to none.