> The information I was is that Gelato Pro *won't work* with a GeForce card, 
> but vanilla Gelato will. This suggests to me that they designed it to work 
> properly in that configuration.

Oh I'm sure it works properly, but whether it works as quickly on a GeForce 
compared to a Quadro...

> [I'm no expert, but the nVidia document I saw seemed to suggest that the 
> Quadro cards are more geared to 2D optimisation than 3D. Not sure how that 
> would help here...]

You mean this document:

http://www.nvidia.com/object/quadro_geforce.html

Just looks to me like there is more flexibility built into the card, which 
is exactly what you need when you're trying to off-load as much CPU work 
onto the GPU as possible... (for example being able to have all pixel shader 
IO in 32-bit per channel format looks useful from a general GPU programming 
point of view)

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