If you *have* a Quadra 700, *have* an 8*24GC lying around, and have no better use for it... maybe I'm missing something, but I don't see any good reason not to just use it instead of burning time and money trying to find the non-accelerated version simply so they *won't* be "wasting it". If someone would like to trade the OP a less special card to use for their second monitor so they can have the GC for their pet IIfx speak up, maybe they'd consider it.
As an aside, I have to admit I'm curious about the "ATI Acceleration Extension" that works with this card on PowerPC Macs. I read the technical article linked off one of the LEM links about how acceleration worked with the 8*24GC because I was wondering if the card was based on some ancient ATI chipset, like the old 8514/A-compatible Mach 8... and it's most definitely not. With the original driver the card inserts itself *deeply* into the guts of Quickdraw, and the card uses a general-purpose am29000 CPU, not a fixed-function GPU. So... does the later extension reprogram the hardware so it emulates the simpler functions supported by ATI graphics accelerator chips, or does the card still work the way it did under System 6 when running that driver? Anyone happen to know of a technote explaining it?