From the Manufacturer
https://www.asus.com/us/Motherboards/TUF-Z270-MARK-1/
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Mfr Part Number: TUF Z270 MARK 1
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CPU: LGA1151
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Supports the 7th/6th Generation Intel Core i7/ i5/ i3/ Pentium/ Celeron Processors
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Supports Intel 14nm CPU
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Supports Intel Turbo Boost Technology 2.0
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Chipset: Intel Z270
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Memory: 4x DDR4-3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3300(OC)/ 3200(OC)/ 3000(OC)/ 2800(OC)/ 2666(OC)/ 2400(OC)/ 2133 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 64GB
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Slots: 2x PCI-Express 3.0/2.0 x16 Slots (run at x16 or dual x8), 1x PCI-Express 3.0/2.0 x16 Slot (runs at x4), 3x PCI-Express 3.0/2.0 x1 Slots
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Multi-Graphics: Supports AMD 3-Way CrossFireX and NVIDIA 2-Way SLI Technology
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Storage:
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SATA: 6x SATA3 Ports, Support RAID 0, 1, 5, 10
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M.2: 2x M.2 Ports M Key, one supports type 2242/ 2260/ 2280/ 22110 & SATA & PCI-Express x4 mode, one supports type 2242/ 2260/ 2280 PCI-Express mode
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Audio: Realtek ALC S1220A 8-Channel High Definition Audio CODEC
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LAN: Intel I219V and Intel I211 Gigabit Ethernet Controllers
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Ports: 2x USB 3.1 Ports (1 Type-A rear, 1 Type-C rear), 6x USB 3.0 Ports (2 rear, 4 at mid-board), 8x USB 2.0 Ports (4 rear, 4 at mid-board), 1x TUF Detective USB Port, 1x DisplayPort, 1x HDMI Port, 2x RJ45 LAN Ports, 1x Optical S/PDIF out, Audio I/O Jacks
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Power Connector: 1x 24pin EATX Power Connector, 1x 8pin ATX 12V Power Connector
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Form Factor: ATX, 12.0 x 9.6 inch / 30.5 x 24.4 cm