Asrock h81 pro btc boot from usb

Model: H81 PRO BTC

Chipset: Intel^® H81

Audio: 5.1 CH HD Audio (Realtek ALC662 Audio Codec)

LAN:
PCIE x1 Gigabit LAN 10/100/1000 Mb/s
Realtek RTL8111GR
Supports Realtek RealWoW! Technology
Supports Wake-On-LAN
Supports LAN Cable Detection
Supports Energy Efficient Ethernet 802.3az
Supports PXE

Slots:
1 x PCI Express 2.0 x16 Slot (PCIE2: x16 mode)
5 x PCI Express 2.0 x1 Slots

Storage Interface:
2 x SATA3 6.0 Gb/s Connectors, support NCQ, AHCI and Hot Plug
2 x SATA2 3.0 Gb/s Connectors, support NCQ, AHCI and Hot Plug

Connectors:
1 x IR Header
1 x COM Port Header
1 x Power LED Header
1 x TPM Header
2 x CPU Fan Connectors (1 x 4-pin, 1 x 3-pin)
2 x Chassis Fan Connectors (1 x 4-pin, 1 x 3-pin)
1 x Power Fan Connector (3-pin)
1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector
2 x SLI/XFire Power Connectors
1 x Front Panel Audio Connector
1 x SPDIF Out connector
2 x USB 2.0 Headers (Support 4 USB 2.0 ports)

Rear Panel I/O:
1 x PS/2 Mouse Port
1 x PS/2 Keyboard Port
1 x Serial Port: COM1
1 x Parallel Port (ECP/EPP support)
1 x D-Sub Port
1 x HDMI Port
2 x USB 2.0 Ports
2 x USB 3.0 Ports
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jack: Line in / Front Speaker / Microphone

Unique Features:
ASRock APP Shop
ASRock A-Tuning
ASRock Instant Flash
ASRock APP Charger
ASRock XFast LAN
ASRock XFast RAM
ASRock Crashless BIOS
ASRock OMG (Online Management Guard)
ASRock Internet Flash
ASRock UEFI Tech Service
ASRock Dehumidifier
ASRock Easy Driver Installer
ASRock Interactive UEFI
ASRock Fast Boot
ASRock Restart to UEFI
ASRock USB Key
ASRock FAN-Tastic Tuning