PCI 3.0 x 2 (single @ x16 or dual @ x8)

[Mr Bob]

Reference: ASUS P8Z68-V PRO/GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS ( http://www.newegg.com/Product/Produc...82E16813131790 )

I don't quite understand what this means...

PCI Express 3.0 x16: 2 (single @ x16 or dual @ x8)

If you have 2 x16 slots, why would you use 2 and be limited to x8? Am I reading that correctly?

 

[=Wendy=]

There are only 16 PCIe lanes available for graphics on LGA 1155, so if you add two cards those lanes are shared between the two cards. So each card can only run at x8.

 

[Mr Bob]

What about 1 pci e x16 and 1 standard pci card?

 

[=Wendy=]

What about 1 pci e x16 and 1 standard pci card?

You shouldn't have any problem with that configuration.
The graphics card should run @ x16, but check with the manufacturer of the mobo, as most use an Asmedia bridging chip on LGA 1155 for PCI, as the chipset itself doesn't support it.

You may find that some PCI cards just wont work at all.
.

 

[Mr Bob]

What about 1 pci x in a 3.0 slow, and 1 in a 2.0 slot. Will it still be limited to x16?

Or, in the specs below, is it assuming that if you use both 3.0 slots, AND you use the 2.0 slot, that the 2.0 is going to be x4?

PCI Express 3.0 x16: 2 (single @ x16 or dual @ x8)
PCI Express 2.0 x16: 1 @ x4

 

[FAUguy]

What about 1 pci x in a 3.0 slow, and 1 in a 2.0 slot. Will it still be limited to x16?

Or, in the specs below, is it assuming that if you use both 3.0 slots, AND you use the 2.0 slot, that the 2.0 is going to be x4?

PCI Express 3.0 x16: 2 (single @ x16 or dual @ x8)
PCI Express 2.0 x16: 1 @ x4

I'm pretty sure you can't fit a regular PCI card into a PCI Express slot due to the different connector layout.