Цитата
1 x PCI Express x16 slot, running at x16 (PCIEX16)
* For optimum performance, if only one PCI Express graphics card is to be installed,
be sure to install it in the PCIEX16 slot.
Š 1 x PCI Express x16 slot, running at x8 (PCIEX8)
* The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is
populated, the PCIEX16 slot operates at up to x8 mode.
Š 1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the M2P connector. The PCIEX4 slot operates
at up to x2 mode when a PCIe SSD is installed in the M2P connector.
Š 3 x PCI Express x1 slots
Соответственно x16 и х8 - процессорные.
х4 - чипсетный. Он эти линии с М.2 делит.