7100 vs 8100 mobo - differences?

#1 Fri, 16 Aug 2013 - 17:31

Pretty much the title is the question. What, if any, are the differences between the 7100 and 8100 logic boards? Assuming identical speeds.

#2 Fri, 16 Aug 2013 - 17:41

According to lowendmac:

Code:

.         | 7100 | 8100 |
-------------------------
RAM slots |   4  |   8  |
Max RAM   |  136 |  264 | MB
power     |  230 |  200 | watts
-------------------------

Anything else significant that anyone is aware of?

#3 Sun, 15 Sep 2013 - 14:59

Power connector - the 7100 uses the IIcx/IIci/IIvx/Q700/Q650 power connector. 8100 uses the Quadra 900/PCI PowerMac power connector.

#4 Mon, 21 Oct 2013 - 20:14

The 8100 has a second "Fast" internal only SCSI bus using a NEC 53CF96 chip -- later SYMBIOS 53CF96 and still later LSI Logic 53CF96.. The 7100 has only the one SCSI bus.

This is why I suspect that the "MESH" chip in the x500 and X600 PCI PowerMacs is actually just a licensed 53CF96. The 9500 succeeded the 8100 and the second SCSI bus stayed exactly the same in functionality but the chip changed from 53CF96 to MESH.

#5 Mon, 21 Oct 2013 - 21:07

just a licensed 53CF96

it blows my mind just how big technology companies were able to:

1. get projects completed.

2. make any money.

after the taxes/payroll/building costs/bills/logistics/advertising/UIA/licensed/royalties/ lawyers… yada yada

and all of what goes in to something like for example a Quadra 700.

Design / Plastic's / PCB / Parts / Placement / PSU / etc. takes a big crew of people. and a whole lotta vendors.

I have no idea legally who all gets paid for using technology from

Standards/Associations - Licensed Technology… POOOF!

I guess I'd be interested to see a breakdown.