A very simple and fundamental point to consider.Originally Posted by Peter
If a user wants to run 4 projectors from a single catalyst:
This means as user would need at least 8 layers to A-B switch between content. In this scenario, the extra two layers gained by an 8-Core wouldn't be much use.
If a user wants to run 3 outputs from a single Catalyst:
Having 10 layers from an 8-core would yield 3 layers per output with one spare. Essentially only using 9 layers would mean a little extra overhead gained from not using layer 10. If we're stuck with only 8 layers, it means one output can only A-B.
Please note that doing 3 or 4 outputs from a Catalyst at 1024x768 can only be achieved using an additional hardware device such as a TripleHead2Go or DualHead2Go from Matrox.
TODD SCRUTCHFIELD 
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