CPU Socket Type: 1 x LGA 2011-3
Mounting pitch: narrow ILM (56 x 94 mm)
Recommended cooling device dimension: 70 x 106 mm
Max. length of M4 screw threads: 3.7 mm
Screws longer than 3.7 mm might damage the motherboard
PCI Express x16: 2 x PCI Express x16 slots, running at x16 (PCIE_1, PCIE_2)
* For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIE_1 slot; if you are installing two PCI Express graphics cards, it is recommended that you install them in the PCIE_1 and PCIE_2 slots.
2 x PCI Express x16 slots, running at x8 (PCIE_3, PCIE_4)
* The PCIE_4 slot shares bandwidth with the PCIE_1 slot. When the PCIE_4 slot is populated, the PCIE_1 slot will operate at up to x8 mode.
* When an i7-5820K CPU is installed, the PCIE_2 slot operates at up to x8 mode and the PCIE_3 operates at up to x4 mode.
(All PCI Express x16 slots conform to PCI Express 3.0 standard.)