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Gigabyte's GA-Z77X-UD3H and GA-Z77X-UD5H Motherboards
User manual Gigabyte GA-Z77X-UD3H (English - 124 pages)
Over 10 years old, my Gigabyte z77x-ud3h might finally be due to retire after a pci-e slot got ripped out. Best damn motherboard a guy could ask for. : r/pcmasterrace
Refurbished: GA-Z77X-UD3H For Gigabyte LGA 1155 DDR3 32GB PCI-E 3.0 SATA3 Z77 ATX Desktop Motherboard PC High Quality Fast Ship - Newegg.com
Gigabyte GA-Z77X-UD3H user manual (English - 124 pages)