Yep, did the same, browsing through the forums and the web in these days. I'm going to call them later in the afternoon. Let us know how far did you get.
One question still remains for me: is it possible to safely use the dual Mac Pro with only 1 CPU installed? That would be a very nice compromise, with swapping in only a single (bud dual-capable X6xx) Hex CPU and adding later another one when needed: that is, speed right now, and even more speed in the future.
I found the Early 2009 Service Manual, in which it is stated that the technician could test if a given CPU works by leaving CPU B socket empty, installing the CPU into socket A and the computer should boot up. So, in this sense, for testing purposes it should definitely work, but another question whether is it ok using the Mac Pro in this configuration for a prolonged period. In principle, the X58 chipset is supporting this setup and other workstations with X58 dual socket motherboards, like HP, Dell, can be used with only 1 CPU. But I have not found any reports about someone using the Mac Pro in such a way.
One question still remains for me: is it possible to safely use the dual Mac Pro with only 1 CPU installed? That would be a very nice compromise, with swapping in only a single (bud dual-capable X6xx) Hex CPU and adding later another one when needed: that is, speed right now, and even more speed in the future.
I found the Early 2009 Service Manual, in which it is stated that the technician could test if a given CPU works by leaving CPU B socket empty, installing the CPU into socket A and the computer should boot up. So, in this sense, for testing purposes it should definitely work, but another question whether is it ok using the Mac Pro in this configuration for a prolonged period. In principle, the X58 chipset is supporting this setup and other workstations with X58 dual socket motherboards, like HP, Dell, can be used with only 1 CPU. But I have not found any reports about someone using the Mac Pro in such a way.