2010 Mac Pro - only 3 PCI expansion slots?

[sparkie7]

From  site:

PCI Express expansion
Three open full-length PCI Express expansion slots5
One PCI Express 2.0 x16 slot
Two PCI Express 2.0 x4 slots
All slots provide mechanical support for 16-lane cards
300W combined maximum for all PCI Express slots

--- is that including or excluding the graphics card that comes installed?

 

[chrfr]

From  site:
Three open full-length PCI Express expansion slots

Just what it says... there are 3 slots you can use, not counting the one used by the graphics card.