Scan code: LN104733 Manufacturer code: 90-MXBBJ0-A0UAYZ

ASRock Intel Core-X X299 Steel Legend ATX Motherboard

ASRock X299 Steel Legend, Intel X299, S 2066, DDR4, SATA3, Dual M.2, 3-Way SLi/CrossFire, Intel GbE, USB 3.2 A+C, ATX

Thumbnail 1 : ASRock Intel Core-X X299 Steel Legend ATX Motherboard Thumbnail 2 : ASRock Intel Core-X X299 Steel Legend ATX Motherboard Thumbnail 3 : ASRock Intel Core-X X299 Steel Legend ATX Motherboard Thumbnail 4 : ASRock Intel Core-X X299 Steel Legend ATX Motherboard
Scan code: LN104733 Manufacturer code: 90-MXBBJ0-A0UAYZ
£249.98Item due on 21 May 2021
Due 21st May
From £12.00 / month (APR 14.9%)
Monthly Payment: £22.45
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £249.98
Total inc. interest: £269.27
Monthly Payment: £12.00
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £249.98
Total inc. interest: £287.95
If you are approved for a credit limit with PayPal Credit and use it for future purchases, the APR for those purchases won't be more than 21.9% and may be even lower.

Representative Example:

Purchase Rate: 21.9% p.a. (variable)

Representative: 21.9% APR (variable)

Assumed Credit Limit: £1,200

Subject to status. Terms and Conditions apply.
spend over £280 and Buy Now, Pay Later or spread the cost of your finance over 24-48 months with a 10% deposit.
Delivery Options
  • By DPD to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

    Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery window

    Weekend, timed and European delivery options are available at checkout
  • Collect instore Collect from our Bolton store, BL6 6PE | Free

    Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)

  • UPS and DPD Pickup Pickup from local convenience store | £4.79

    Collect your parcel from your newsagents, petrol stations and convenience stores

  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

ASRock X299 Steel Legend ATX Motherboard

ASRock x299 Steel Legend High end ATX motherboard

Empower your ImaginationHere it is, the ASRock X299 Steel Legend, built for pure performance and sustainability and targeting most mainstream users. Featuring dual Intel Gigabit LAN, NVIDIA NVLINK, 3-way SLI and 3-way AMD CrossFireX and an XXL aluminium heatsink/heatpipe design. The X299 Steel Legend represents the rock-solid durability and irresistible aesthetics and provides a strong array of materials/components to ensure a stable and reliable performance. A motherboard that can fulfill every task - with style.

Intel X299Chipset

2066CPU Socket

Intel Core-XCompatible CPUs

ATXForm Factor

Super-Fast Storage

Alluminium Alloy Heatshields

Dual M.2 for SSDASRock have included two of the worlds fastest M.2 slots. one interfaces via PCIe Gen3 x4 and provides ultra-fast transfer speeds of up to 32 Gb/s and the other also supports SATA3 6 GB/s both are protected by an integrated aluminum alloy cover.

11 Phase Power Design

11 Power Phase Design

Sturdy & Stable Power DeliveryBuilt from sturdy components and based on an 11 power phase design giving you stable voltage outputs from the VRMs and ensuring smooth power delivery to the CPU which in turn means the X299 Steel Legend offers unmatched overclocking capabilities and enhanced performance with lower temperature outputs.

Step-Up your PC Performance


Dr.MOSDr.MOS is the integrated power stage solution which is optimised for synchronous buck-set down voltage applications. Delivering higher current and driving up to 50A of continuous current for each phase, the benefit of this is improved thermal results and better performance.

Super Speed USBs Including Type-C

Type-C & Type A USB Ports The X299 Steel Legend features a plethora of USB Connections ranging from 2x USB 2.0 Headers for the front panel (capable of supporting 4 USB 2.0 ports), 1x USB 3.2 Gen1 header (supports 2x USB 3.2 Gen1 ports) and 1x Front Panel Type C USB Header directly on the board whilst the rear I/O panel hosts 4x USB 2.0 Ports, 1x USB 3.2 Gen2x2 Type-C port(20 Gb/s) and 3x USB 3.2 Gen1 Ports providing you with multiple connections to connect all of your peripherals and controllers as you deem necessary.

Latest Type-C Connections

USB 3.2 Gen2x2 Type-C The very latest in Type-C connections offering transfer speeds of up to 20 Gbps which is twice as fast as previous generations, giving you blazing fast data transfer and a highly sought after reversible USB Type-C port design allowing the connector to fit either way.

Type C Front Panel

Front USB 3.2 Gen1 Type-CThe X299 Steel Legend by ASRock features a front USB 3.2 Gen1 Type-C header delivering up to 5 Gbps and next generation reversible USB design to the front panel of your chosen case allowing you easy access to faster transfer speeds.

No Limit to Longevity

larger heatsink and heatpipes

XXL Aluminium Alloy Heatsink & Heatpipe DesignASRock have gone all out with the X299 Steel Legend by incorporating an extra large aluminium alloy heatsink and heatpipe to take away heat from the MOSFET as effectively as possible to keep your system as stable as possible.

Steel PCI-E

PCI-E Steel SlotIn order to ensure the X299 Steel Legend can support heavier graphics cards they have incorporated steel PCI-e slots this will also reduce and signal interference that may impact GPU performance.

Super Alloy Motherboard

Premium Grade Chokes

Premium 60A Power ChokeWhen compared to traditional chokes, ASrock's premium 60A power chokes make saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

Blacked out PCB

Matte Black PCBASRock introduced a new mysterious matte black and copper colouring for the X299 Steel Legend to match the prestigious components featured on this motherboard.

High Density PCB

High Density PCBThe X299 Creator uses a high density glass fibre PCB design that reduces the gaps in the layers of the PCB to protect the motherboard from shorts caused by high humidity.

Comprehensive I/O Panel

I/O Panel

All the connections you could wantOne of the most important components in a motherboard are the connections made available to you and ASRock have included a plethora of them on the X299 Steel Legends the rear I/O houses 2x wireless antenna ports (located on the I/O Shield**), 4x USB 2.0 Type-A Ports, 1x USB 3.2 Gen2x2 Type-C ports, a full comprehensive HD audio panel including SPDIF out port, 3x USB 3.2 Gen1 ports, 2x RJ-45 ports complete with LED indicators, 1x PS/2 Keyboard/mouse Combo Port and finally a clear CMOS button.

Let Your Light Shine

live update app shop

Polychrome Supported ASRock high-end motherboards deliver stunning performance and superior aesthetics, with multiple headers available on the board to allow you to connect multiple RGB devices and sync Polychrome enabled devices allowing you to flood your system with your own aesthetically pleasing lighting colour schemes.

Optimise the Performance of your Motherboard

live update app shop

LIVE UPDATE & APP SHOP ASRock Live Update & APP Shop have been designed to make using your motherboard as convenient as possible. They offer a plethora of apps and support software that you can download. You can also easily optimize your system and keep your motherboard up to date.

Safeguard your Board from Damaging Surges

Full spike protection

FULL SPIKE PROTECTION Your motherboard has some sensitive digital components that can be vulnerable to power surges. The excessive current can cause your system to malfunction, so ASRock's Full Spike Protection features a range of technologies to prevent your motherboard's components from being damaged by unexpected voltage spikes.

Core Specifications
Edition X299 Steel Legend
Form Factor ATX
CPU Socket 2066
Chipset Intel X299
RAM Memory Support
Memory Type DDR4
Memory Channel Quad (4)
Memory Type (ECC) Non-ECC
Memory Type (R/U) UDIMM (Unbuffered)
Memory Speed (Mhz)
  • DDR4 - 2133
  • DDR4 - 2400
  • DDR4 - 2666
  • DDR4 - 2800(OC)
  • DDR4 - 2933(OC)
  • DDR4 - 3200(OC)
  • DDR4 - 3600(OC)
  • DDR4 - 3733(OC)
  • DDR4 - 3800(OC)
  • DDR4 - 4000+(OC)
  • DDR4 - 4200(OC)
Max. Memory Capacity 256GB
Audio 7.1 Channel HD Audio
Graphics Support
Primary GPU Interface PCIe 3.0 (x16)
NVIDIA SLI Support 3-Way SLi
AMD CrossFire Support 4-Way CrossFire
Integrated Graphics  
On-Board Graphics Connectors None
Internal Connectivity
Expansion Slots
  • 1 x M.2 Key E (Supports Wi-Fi modules)
  • 1 x M.2, 22-42/60/80/110, PCIe Gen3x4
  • 1 x M.2, 22-60/80, PCIe Gen3/SATA
  • 1 x PCIe 3.0 x1
  • 4 x PCIe 3.0 x16
SATA Support SATA3
RAID Support via SATA
Storage Mode Support
  • AHCI
  • Hot Plug
  • Intel Rapid Storage Technology 17
  • Intel® Smart Response Technology
  • NCQ
  • RAID 0
  • RAID 1
  • RAID 10
  • RAID 5
  • Virtual RAID On CPU
Internal I/O
  • 1 x 24-pin (Power)
  • 2 x 8-pin (Power)
  • 2 x Addressable Digital RGB Header
  • 5 x Chassis Water Pump/Fan Connector
  • 1 x CPU Fan Connector
  • 1 x CPU Water Pump/Fan Connector
  • 1 x Power LED / Speaker Header
  • 2 x RGB Header
  • 8 x SATA III - 6Gb/s
  • 1 x Thunderbolt AIC Connector
  • 1 x TPM Header
  • 2 x USB 2.0 Header
  • 1 x USB 3.2 Gen1 Header
  • 1 x USB 3.2 Gen1 Type-C Front Panel Header
  • 1 x Virtual RAID on CPU Connector
External Connectivity
Network Interface Type Wired Gigabit LAN (10/100/1000)
Network Chip/Modules
  • 1 x Intel® I211AT (Gigabit LAN)
  • 1 x Intel® I219V (Gigabit LAN)
Rear I/O Connectors
  • 1 x 7.1 Audio I/O
  • 2 x Antenna Ports
  • 1 x Clear CMOS Button
  • 1 x PS/2 Keyboard/Mouse Combo
  • 2 x RJ-45 with LED
  • 1 x S/PDIF-Out (Optical)
  • 4 x USB 2.0
  • 3 x USB 3.2 Gen1 Type-C
  • 1 x USB 3.2 Gen2 Type-C
Additional Specifications
Water Cooled No
QPI Speed N/A
Board Dimensions 305 x 244 mm
Additional Information
Scan Code LN104733
Model Number 90-MXBBJ0-A0UAYZ
GTIN 4717677339895

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

24 months
Return to base
DOA Period:
28 days
RTB Period:
24 months
Manufacturer Contact Details
0871 472 4747
Loading Please Wait

Please wait . . .

TekSpek Guides
Intel X299 chipset motherboards
Intel X299 chipset motherboards
Date Issued: 22nd Jun 2017

These are exciting times to be in the market for a new CPU. AMD is back in the game with its competitive Ryzen processors, while Intel has upped the ante in the enthusiast space with a refresh of its High-end Desktop (HEDT).

Read More


Will this work well with a 5960x or is this for a different gen of processors?
Asked by: woddle1000
Good Morning, Unfortunately, this CPU will not work with this motherboard. I would recommend checking out the link below you can see which CPU's will work. Kind Regards,
Answered by: LukeW
Date published: 2020-02-17
  • y_2020, m_9, d_10, h_15CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.12
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_en_GB, sid_104733, prod, sort_[SortEntry(order=LOCALE, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_scan
ASRock Intel Core-X X299 Steel Legend ATX Motherboard
ASRock Intel Core-X X299 Steel Legend ATX Motherboard