Asrock 90-MXBBJ0-A0UAYZ X299 Steel Legend Intel X299 90-MXBBJ0-A0UAYZ

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. A motherboard that fulfills every task � with style!

REVOLUTIONARY X299 MOTHERBOARDS:Your PC Transformed
Style . More reliable. Design that delivers.

XXL Aluminum Alloy Heatsink & Heatpipe Design
Extra-large aluminum alloy heatsink along with heatpipe that effectively take away heat from the MOSFET, so that your whole system may perform more stable.

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.

RULE YOUR OWN LIGHTING WAY - POLYCHROME RGB
ASRock motherboards deliver stunning performance and superior aesthetics to rule your own colorful lighting way! ASRock offers a very comprehensive control to perform the built-in RGB LEDs or the connected LED strips, CPU fans, coolers, chassis and any RGB devices smoothly. Devices can be synchronized across the Polychrome RGB Sync-certified accessories as well.

Dual M.2 For SSD
Two of the world�s fastest M.2 slots. One delivers up to PCIe Gen3 x4 32Gb/s transfer speed, the other one supports SATA3 6Gb/s mode.

11 Power Phase Design
Designed with a 11 Power Phase design, this motherboard features sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.

Dr. MOS
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Intelligently delivering higher current and driving up to 50A continuous current for each phase, thus providing improved thermal result and superior performance.

Post Status Checker
An easy troubleshooting tool that shows the CPU / DRAM / VGA / BOOT operation every time you start up the system. Post Status Checker is an fast and easy way to identify the source of the problem.

Front USB 3.2 Gen1 Type-C
Front USB 3.2 Gen1 Type-C header delivers up to 5 Gbps data transfer rate and next generation reversible USB design to the front panel of computer case.

PCI-E STEEL SLOT
The advanced PCI-E Steel Slot packed with solid cover that prevent any signal interference with graphics cards. It also ensures the heavy graphics cards to be well-installed in the PCI-E slot safely.

XXL Aluminum Alloy Heatsink
Extra large aluminum alloy heat sinks that effectively take away heat from the MOSFET and chipset so that your whole system may perform more stable.

Premium 60A Power Choke
Compared to traditional chokes, ASRock�s premium 60A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

Dr. MOS
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Intelligently delivering higher current and driving up to 50A continuous current for each phase, thus providing improved thermal result and superior performance.

Nichicon 12K Black Caps
Supreme 12K black capacitors with lifespans of at least 12,000 hours. Compared to other counterparts on high-end motherboards that merely have lifespans of around 10,000 hours, ASRock applied Nichicon 12K Black Caps that offer 20% longer lifespans and provide more stability and reliability.

Matte Black PCB
A new mysterious matte black and copper color scheme to match the prestigious components on ASRock's high-end motherboards.

High Density Glass Fabric PCB
High Density Glass Fabric PCB design that reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

Full Spike Protection
Some sensitive digital components on the motherboard are vulnerable to power surges, the excessive current may cause your system to malfunction immediately. ASRock Full Spike Protection includes various technologies to prevent your motherboard�s components from being damaged by these unexpected voltage spikes.

Live Update & APP Shop
ASRock Live Update & APP Shop is designed for your convenience. We provide various apps and support software for users to download. You can also easily optimize your system and keep your motherboard up to date with ASRock Live Update & APP Shop.

BIOS



ACPI version



6.1


BIOS memory size



128 Mbit


BIOS type



UEFI AMI


System Management BIOS (SMBIOS) version



3.0


Expansion slots



PCI Express x1 (Gen 3.x) slots



1


PCI Express x16 (Gen 3.x) slots



4


Features



Audio chip



Realtek ALC1220


Audio output channels



7.1 channels


Certification



FCC, CE, ErP/EuP


Component for



PC


Motherboard chipset



Intel� X299


Motherboard chipset family



Intel


Motherboard form factor



ATX


PC health monitoring



Fan, Temperature, Voltage


Windows operating systems supported



Windows 10 x64


Graphics



Parallel processing technology support



3-Way CrossFireX, 3-Way SLI, CrossFireX, NVLink, SLI


Internal I/O



12V power connector



Yes


ATX Power connector (24-pin)



Yes


CPU fan connector



Yes


Front panel audio connector



Yes


Number of chassis fan connectors



5


Number of SATA III connectors



8


RGB LED pin header



Yes


Thunderbolt headers



1


TPM connector



Yes


USB 2.0 connectors



2


USB 3.2 Gen 1 (3.1 Gen 1) connectors



2


Logistics data



Harmonized System (HS) code



84733020


Memory



Maximum internal memory



256 GB


Memory channels



Quad-channel


Memory slots type



DIMM


Non-ECC



Yes


Number of memory slots



4


Supported memory clock speeds



2133, 2400, 2666, 2800, 2933, 3200, 3600, 3733, 3800, 4000, 4200


Supported memory types



DDR4-SDRAM


Unbuffered memory



Yes


Network



Ethernet interface type



Gigabit Ethernet


Ethernet LAN



Yes


LAN controller



Intel� I211-AT, Intel� I219-V


Wi-Fi



No


Package dimensions



Gross Weight (Package, kg)



1.3 kg


Packaging content



Cables included



SATA


Drivers included



Yes


Processor



Compatible processor series



Intel� Core� X-series


Maximum number of SMP processors



1


Processor manufacturer



Intel


Processor socket



LGA 2066 (Socket R4)


Product dimensions



Net Weight (Product, kg)



1 kg


Product Depth



24.4 cm


Product Width



30.5 cm


Rear panel I/O ports



Digital audio optical out



1


Ethernet LAN (RJ-45) ports



2


PS/2 ports quantity



1


S/PDIF out port



Yes


USB 2.0 ports quantity



4


USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity



3


USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity



1


Storage controllers



RAID levels



0, 1, 5, 10


Supported storage drive interfaces



SATA III


Vendor information



Brand Name


Asrock


Warranty



1 Year(s)