I'm trying to get a handle on the allocation of PCIe channels on my P8P67 Pro. Piecing together info from a few reviews and the manual I think I have figured it out. Does this look right? Hope this helps others.
The board supports 3 different modes for the PCIe x4 slot. (Auto / X4 Mode / X1 Mode). With SLI/Crossfire the top two PCIe x16 slots run at x8. Otherwise the second x16 slot is turned off. The third x16 slot is always electrically x1 or x4. Also to note the CPU powers the graphics card slots so those PCIe lanes do not pass through the chipset.
P67 PCH - 8 PCI 2.0 lanes.
List of components:
Enabled
Enabled
Enabled
The board supports 3 different modes for the PCIe x4 slot. (Auto / X4 Mode / X1 Mode). With SLI/Crossfire the top two PCIe x16 slots run at x8. Otherwise the second x16 slot is turned off. The third x16 slot is always electrically x1 or x4. Also to note the CPU powers the graphics card slots so those PCIe lanes do not pass through the chipset.
P67 PCH - 8 PCI 2.0 lanes.
List of components:
- PCIe x1_1
- PCIe x1_2
- PCIe x16_3 (electrical x1/x4)
- ASM1085 x1 PCIe to PCI bridge
- VIA VT6308P PCI Firewire controller
- PCI slot 1
- PCI slot 2
- Marvell 9120 x1 PCIe SATA 6Gb/s
- JMicron JMB362 x1 PCIe SATA 3 Gb/s
- NEC x1 PCIe USB 3.0 (Back port)
- NEC x1 PCIe USB 3.0 (Onboard port)
- Intel 82579 Gigabit LAN Physical Layer (PHY) x1 PCIe
Enabled
- PCIe x1_1
- PCIe x16_3 (electrical x1)
- ASM1085 x1 PCIe to PCI bridge
- VIA VT6308P PCI Firewire controller
- PCI slot 1
- PCI slot 2
- Marvell 9120 x1 PCIe SATA 6Gb/s
- JMicron JMB362 x1 PCIe SATA 3 Gb/s
- NEC x1 PCIe USB 3.0 (Back port)
- NEC x1 PCIe USB 3.0 (Onboard port)
- Intel 82579 Gigabit LAN Physical Layer (PHY) x1 PCIe
- PCIe x1_1
Enabled
- PCIe x16_3 (electrical x4)
- ASM1085 x1 PCIe to PCI bridge
- VIA VT6308P PCI Firewire controller
- PCI slot 1
- PCI slot 2
- Marvell 9120 x1 PCIe SATA 6Gb/s
- NEC x1 PCIe USB 3.0 (Back port)
- NEC x1 PCIe USB 3.0 (Onboard port)
- Intel 82579 Gigabit LAN Physical Layer (PHY) x1 PCIe
- PCIe x1_1
- PCIe x1_2
- NEC x1 PCIe USB 3.0 (Onboard port)
- JMicron JMB362 x1 PCIe SATA 3 Gb/s
Enabled
- PCIe x1_1
- PCIe x1_2
- PCIe x16_3 (electrical x1)
- ASM1085 x1 PCIe to PCI bridge
- VIA VT6308P PCI Firewire controller
- PCI slot 1
- PCI slot 2
- Marvell 9120 x1 PCIe SATA 6Gb/s
- JMicron JMB362 x1 PCIe SATA 3 Gb/s
- NEC x1 PCIe USB 3.0 (Back port)
- Intel 82579 Gigabit LAN Physical Layer (PHY) x1 PCIe
- NEC x1 PCIe USB 3.0 (Onboard port)