Steel Legend represents the philosophical state of rock-solid durability and irresistible aesthetics. Built around most demanding specs and features, the Steel Legend series aims at daily users and mainstream enthusiasts! Providing a strong array of materials/components to ensure a stable and reliable performance.

Optimized VRM Design
Dr.MOS
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance.

9 Power Phase Design
Featuring sturdy components and completely smooth power delivery to the CPU, offering enhanced performance for gamers.

6 Layer PCB
The 6 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus, it’s able to support the latest memory modules with most extreme memory performance!

PCIe 5.0 Surface-Mount Tech
Compares to conventional DIP style PCIe slot, the SMT type PCIe slot improves signal flow and maximize stability under high speed, a key breakthrough to fully support the lighting speed of the latest PCIe 5.0 standard.

The latest PCI Express 5.0 is capable to perform a breathtaking bandwidth of 128GBps, ready to unleash the full potential of future high end graphic cards.

Nahimic Audio
Whether you are using headphones, a headset, external or internal speakers, via USB, Wi-Fi, analog output or even HDMI, Nahimic Audio offers you the most engaging listening experience, vibrant and rich with details.

POLYCHROME RGB
In addition to the built-in RGB illumination, it also features onboard RGB headers and an addressable RGB header that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.

*The addressable RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V), a max of 80 LEDs and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.

High Speed M.2 Solution
This motherboard is capable of accomadating multiple M.2 storage devices, one of which can support PCI Express 4.0 M.2 SSD, it is capable of performing twice the speed compared to previous 3rd generation, giving a lightning fast data transferring experience.

Dragon 2.5 Gb/s LAN
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you’ll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.

Base Frequency Boost (BFB) Technology
BFB Technology allow the use of increasing TDP to enjoy the base frequency boost with the hidden power of processors with users’ non K series CPUs and ASRock’s selected 600 series motherboards

While ASRock BFB breathes life into non K series CPUs, the boost frequency currently still depends on the cooling system applied on your rig.

BFB frequency performance results may vary between different CPUs and hardware configurations.

Front USB 3.2 Gen2x2 Type-C
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation, providing a blazing fast data transfer interface with reversible USB Type-C design that fits the connector either way.

BIOS Flashback
Get the most convenient BIOS flashing with just a simple click. Users can easily achieve the latest BIOS support with a USB and power supply, No CPU, RAM or other components required.

M.2 (KEY E) For WiFi
Besides the onboard LAN port, users may also choose 802.11ac wireless connections by M.2 (Key E) slot.

*Wi-Fi module is not included.

Main Features
Supports 12th Gen Intel Core Processors (LGA1700)
9 Phase Dr.MOS Power Design
Supports DDR4 5000MHz (OC)
1 PCIe 5.0 x16, 2 PCIe 3.0 x1
1 M.2 Key-E for WiFi
Graphics Output Options: HDMI, DisplayPort
Realtek ALC897 7.1 CH HD Audio Codec, Nahimic Audio
6 SATA3
1 Hyper M.2 (PCIe Gen4 x4)
1 Hyper M.2 (PCIe Gen4 x4 & SATA3)
1 Front USB 3.2 Gen2x2 Type-C
6 USB 3.2 Gen1 (4 Rear, 2 Front)
6 USB 2.0 (2 Rear, 4 Front)
Dragon 2.5G LAN

CPU
CPU Socket    Socket 1700
CPU Brand    Intel
Installed Processors (Max)    0 (1)
Supported Processor Manufacturer    Intel
Supported Processors    12th Gen Intel Core Processors
64-bit Support    Yes
Socket    LGA1700

Rear Panel I/O Ports
USB Ports    4 x USB 3.0
2 x USB 2.0
DisplayPorts    1 x DisplayPort 1.4
HDMI Port    1 x HDMI 2.1
Keyboard/Mouse Combo Port    1 x PS/2
RJ-45 Ports    1 x RJ-45
Audio Line In Ports    1 x 3.5mm Jack
Audio Line Out Ports    3 x 3.5mm Jacks
Microphone In Port    1 x 3.5mm Jack
S/PDIF Port    1 x S/PDIF Optical Out

Internal I/O Connectors
SATA Connectors    6 x SATA III
USB Connectors    1 x USB-C 3.2 header (supports 1 port)
1 x USB 3.0 header (supports 2 ports)
2 x USB 2.0 headers (supports 4 ports)
Speaker    1 x Speaker header
Front Panel Connectors    1 x Front Panel
1 x Front Audio
Cooling Fan Support    1 x CPU fan header
1 x CPU/Water Pump fan header
3 x Chassis/Water Pump fan headers
Chassis Intrusion Connector    1 x Chassis Intrusion header
TPM Header    1 x SPI TPM header
Power Connector Port    1 x 24-pin ATX
1 x 8-pin EPS
Other Connectors    1 x M.2 slot, Key M, Type 2242/2260/2280 (PCIe Gen4)
1 x M.2 slot, Key M, Type 2280 (PCIe Gen4 or SATA)
1 x M.2 slot, Key E, Type 2230 for Wi-Fi module only
3 x 3-pin ARGB LED headers
1 x 4-pin RGB LED header

Memory
Memory Bus Speed    Up to 5000 MHz
Memory Type    DDR4
Maximum RAM    128 GB
Memory Slot    4 x DIMM

Motherboard
Chipset Manufacturer    Intel
Northbridge    B660
RAID Supported    Yes
RAID Format    RAID 0, 1, 5, 10
SATA Supported    Yes

Expansion
Number of PCI Express Slots    1 x PCI Express 5.0 x16 slot
2 x PCI Express 3.0 x1 slots

Graphics Device
Integrated Graphics Supported    Yes

Sound
Integrated Sound    Realtek ALC897

Warranty
Warranty    3 Years

Network
Integrated Network    Dragon RTL8125BG
Network Speeds Supported    Up to 2.5 Gbps
Wireless LAN    No
Bluetooth    No

System Requirements
Operating Systems Supported    Microsoft Windows 11 / 10 64-bit

System
BIOS    128Mb AMI UEFI Legal BIOS with multilingual GUI support
ACPI 6.0 Compliant wake up events
SMBIOS 2.7 Support
CPU Core/Cache, CPU GT, DRAM, VDD_IMC, VCCIN AUX, 1.05V PROC, 1.8V PROC, 0.82V PCH, 1.05V PCH Voltage Multi-adjustment
Software Included (may be trial or restricted)    Yes
Drivers    Yes

Physical
Form Factor    MicroATX Motherboard
In The Box    ASRock B660M Steel Legend Motherboard
Quick Installation Guide
Support CD
I/O Shield
2 x SATA Data Cables
3 x Screws for M.2 Sockets
1 x Standoff for M.2 Socket
Width    244 mm
Length    244 mm

Key Features
On-board RGB Control    ASRock RGB LED
Memory Speed    5000 MHz
RGB Header Type    3-Pin ARGB
Addressable RGB    Yes
Internal USB Type-C Header    Yes
Firewire    No
Wireless Network    No
Memory Channel    Dual
On-board Audio Type    7.1
Number of SATA Ports    6 port(s)
Number of USB Ports    6 port(s)
SATA III Support    Yes
USB 3.0 Support    Yes
Multi GPU Support    No
VGA Connection    No
DVI Connection    No
HDMI Connection    Yes
DisplayPort Connection    Yes
Motherboard Form Factor    mATX
Motherboard Power Connectors    4 4-Pin
Motherboard Chipset    Intel B660
Thunderbolt    No
Motherboard Model    ASRock B660M Steel Legend
USB 3.1 Support    No
Internal USB3.0 Header    Yes
M.2 Support    Yes