The next two Xbox 360 motherboard revisions will be called Opus and Valhalla. Quick, somebody call CNN!
Wanton speculation points to Valhalla being the final motherboard revision for the Xbox 360, though that depends on the further success of the console and what Microsoft has in store for the next generation Xbox. (Keep in mind the Xbox 360 will be three years old this fall—time to start expecting news on the next-gen system to trickle out.) Valhalla will make use of a 65nm GPU and CPU, which should help cut down on the overheating, which is partly what causes the red ring of death.
As for the Opus, that’s the board Microsoft will use for rrod’d Xbox 360s that it repairs. Only the CPU is 65nm there, while the GPU remains at 90nm.
Next Xbox 360 Designs are “Opus” and “Valhalla” [Digital Joystick]