From psu.com:
[QUOTE]
Christophe Balestra, Co-President of Naughty Dog:

"The main thing about the PlayStation 3 is the Cell processor and more specifically the SPU's. We are only using 30 percent of the power of the SPU's in Uncharted. We've been architecting a lot of our systems around this and we were able to take full advantage of that power. A big part of our systems is running on SPU's: scene bucketing, particles, physics, collision, animation, water simulation, mesh processing, path finding, etc. For our engine, the cool thing about having the SPU's is the fact we can minimize what we send to the RSX (the graphic chip), it allows us to reject unnecessary information and get the RSX to be very efficient."
[/QUOTE]

Full Story: psu.com (via n4g.com)

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