First contact with a Mac Pro

After Apple Expo last week which barely let us time to breathe, we finally managed to install a 3 GHz Mac Pro delivered at the beginning of last week.
As opposed to what we could read on some sites, migrating applications and users from a Mac PPC worked flawlessly. Only took, as usual, reinstalling some drivers and utilities.
The first surprising thing is the silence of this machine, although there's a Radeon X1900 XT card in. The only sound that can be heard is that of the hard drives. The sound level is barely superior to that of the first G4 Power Mac models. What a change as compared to G5s, even watercooled ones!
We didn't have a chance yet to run any performance tests, yet the machine proved incredibly fast on boot and more than reactive.
Our configuration isn't yet as we would like it to be. Reinstalling the system on a Raptor 150 will be the final step: when you've tried it, the access times of the original 250 Go HD look like forever and unacceptable.
A follow up very soon.
[Upd.] We just made a test with a very surprising reuslt. We launched on the Mac Pro Altivec Fractal Carbon G5. It's the 64 bits version,which runs via Rosetta. This machine reaches 20 GigaFlops! A result that could be compared to an hypothetical 2.9 GHz dual G5. And very far from the 3.1 Gflops reached by a MacBook Core duo at 2.16 GHz!
[Upd2] Even better with a version that's not optimized for G5s, reaching 24 GFlops. Quite paradoxically, after the G5 Quad that reaches about 30 GFlops, it's the fastest Altivec machine...