Thaks for the link. Here's what I read that seems to apply:
Mac Pro (Early 2009), Mac Pro (Mid 2010), and Mac Pro (Mid 2012)
The Mac Pro (Early 2009), Mac Pro (Mid 2010), and Mac Pro (Mid 2012) computers implement PCI Express revision 2.0 for all four slots. Slots 1 and 2 are x16 slots, and slots 3 and 4 are x4 slots. As with the Mac Pro (Early 2008), placing a revision 1 card in a revision 2.0 slot works and results in a revision 1 link.
The Expansion Slot Utility is not required for these configurations, since the number of lanes for each slot are permanently set.
So my open slot 2 is a full tilt 16x slot which should more than handle the PCIe SSD card. Now I will have to research something I saw mentioned about the card SSD not showing up as a bootable drive if you hold the option key down on startup but only showing up in the system preferences startup drive section. Doesn't sound like a big problem but it was mentioned on the OWC site.
---In Avid-L2@yahoogroups.com, <bncrcaxlr@...> wrote :
On 2014-12-23, at 3:19 PM, bigfish@... [Avid-L2] wrote:
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> That is very interesting. Does anybody know if slot 4 has the 4X, I assume that's referring to lanes or is that architecture no longer valid, to get full speed on the PCIe SSD card?
>
Posted by: bigfish@pacbell.net
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