Posted by: chrisNova777
« on: November 06, 2018, 04:01:08 AM »http://revyourmac.com/blog/mac-pro-expansion-slots-pcie/
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Are My Mac Pro Expansion Slots PCIe 2.0 or 1.0?
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Every Mac Pro comes with four expansion slots on the motherboard, which can easily be accessed by taking off the side panel of your machine. Your graphics card will be in slot 1, which is double wide.
MacProExpansionSlots
PCIe 2.0 (PCI Express version 2.0) supports double the transfer rate compared to PCIe 1.0.
MacPro 4,1 (2009) and 5,1 (2010):
Slot 1: PCIe 2.0 (x16)
Slot 2: PCIe 2.0 (x16)
Slot 3: PCIe 2.0 (x4)
Slot 4: PCIe 2.0 (x4)
Mac Pro 3,1 (2008):
Slot 1: PCIe 2.0
Slot 2: PCIe 2.0
Slot 3: PCIe 1.0
Slot 4: PCIe 1.0
Mac Pro 1,1 (2006) and 2,1 (2007):
All Slots PCIe 1.0