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
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