Asus

Asus Prime X299-A II Desktop Motherboard - Intel Chipset - Socket R4 LGA-2066 - Intel Optane Memory Ready - ATX (primex299-aii)

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SKU:
18014377
MPN:
primex299-aii
Availability:
Out of stock
Stock Update:
12/13/2025 02:13:17 AM PST
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Out of stock

Stock Update:
12/13/2025 02:13:17 AM PST

Description



This item is brand-new, factory sealed.

Intel LGA 2066 socket: Ready for the latest Intel Core X-series processors

AI Overclocking: Quickly optimizes your CPU performance based on the CPU and cooler, achieving results that are extremely close to manual tuning by experts

Robust power design: 12 IR3555 power stages, ProCool II connectors, alloy chokes and ultra-durable capacitors for stable power delivery

M.2 heatsink: Ultra-efficient heatsink reduces M.2 SSD temperatures by up to 20 C for unthrottled transfer speeds and enhanced reliability

Next-gen connectivity: Intel Optane memory ready, Intel VROC support, dual M.2 support, and USB 3.2 Gen Type-C


The Prime X299-A II caters to users with serious pursuits: Those who prefer to put their high-core-count processors to more productive use. This high-end desktop board combines cutting-edge performance with our signature features, including an enhanced VRM tailored for running the CPU performance at stock speeds, intuitive cooling control, next-gen connectivity, and extensive customization.

Get the most out of all your cores

Intel's high-end desktop platform raises the stakes with updated Intel Core X-Series Processors that boast cores, cache, and bandwidth. The Prime X299-A II is ready for the additional processing power that plows through CPU-intensive tasks, and the extra bandwidth allows you to add more GPUs and NVMe SSDs to accelerate a wide range of work.

Robust Power Design

The LGA 2066 socket is compatible with Intel Core X-Series Processors with up to 18 cores, over 44 PCI Express lanes, and 165-watt thermal design power (TDP). Those specs require serious power, so the Prime X299-A II is equipped with an enhanced power solution that includes 12 power stages that line up neatly along the top edge of the PCB.
CPU
Intel Socket 2066 CoreTM X-Series Processors
The Intel Turbo Boost Max Technology 3.0 support depends on the CPU types
Chipset
Intel X299
Memory
(Intel CoreTM i9 10000 X-Series CPU)
8 x DIMM, Max. 256GB, DDR4 4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3800(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2933/2800/2666/2400/2133 MHz Non-ECC, Un-buffered Memory
(Intel CoreTM i9 9000/7000 and i7 9000 X-Series CPU)
8 x DIMM, Max. 256GB, DDR4 4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3800(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3300(O.C.)/3200(O.C.)/3000(O.C.)/2933(O.C.)/2800(O.C.)/2666/2400/2133 MHz Non-ECC, Un-buffered Memory
Supports Intel Extreme Memory Profile (XMP)
Hyper DIMM support is subject to the physical characteristics of individual CPUs.
Multi-GPU Support
Supports NVIDIA Quad-GPU SLI Technology
Supports NVIDIA 3-Way SLI Technology
Supports NVIDIA 2-Way SLI Technology
Supports AMD Quad-GPU CrossFireXTM Technology
Supports AMD 3-Way CrossFireXTM Technology
Expansion Slots
48-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
2 x PCIe 3.0/2.0 x1 1
44-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
2 x PCIe 3.0/2.0 x1 1
28-Lane CPU-
2 x PCIe 3.0/2.0 x16 (x16, x16/x8) 2
2 x PCIe 3.0/2.0 x1 2
1 x M.2 Socket 1 with E key, type 2230 for WIFI/BT devices support PCIE/USB mode
The Wi-Fi E key shares bandwidth with PCIEX1_1.
The Wi-Fi/BT module is purchased separately
Storage
Intel X299 Chipset : 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA and PCIE 3.0 x 4 mode) 3
1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode) 4
8 x SATA 6Gb/s port(s) 5
Support Raid 0, 1, 5, 10
Intel Rapid Storage Technology supports
(Intel CoreTM i9 10000 X-Series CPU) :
2 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode) Support Raid 0, 1, 5, 10
Intel Rapid Storage Technology Enterprise supports
(Intel CoreTM i9 9000/7000 and i7 9000 X-Series CPU) :
1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)
Support Raid 0, 1, 5, 10
Intel Rapid Storage Technology 15 support
Intel OptaneTM Memory Ready 6
LAN
Intel I219V, 1 x Gigabit LAN
ASUS Turbo LAN Utility
ASUS LAN Guard
Audio
Realtek S1220A 8-Channel High Definition Audio CODEC
- Power pre-regulator reduces power input noise to ensure consistent performance
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking
Audio Feature :
- DTS X:Ultra
- Optical S/PDIF out port(s) at back panel
- Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference
- Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals
- Premium Japanese-made audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity
- Unique de-pop circuit: Reduces start-up popping noise to audio outputs
USB Ports
ASMedia USB 3.2 Gen 2 controller : 1
1 x USB 3.2 Gen 2 front panel connector port(s)
ASMedia USB 3.2 Gen 2 controller : 1
2 x USB 3.2 Gen 2 (up to 10Gbps) port(s) (2 at back panel, , Type-A + USB Type-CTM)
Intel X299 Chipset :
8 x USB 3.2 Gen 1 port(s) (4 at back panel, , 4 at mid-board)
Intel X299 Chipset :
6 x USB 2.0 port(s) (2 at back panel, , 4 at mid-board)
Special Features
OC Design - ASUS PRO Clock II Technology
5-Way Optimization by Dual Intelligent Processors 5
- 5-Way Optimization tuning key perfectly consolidates TPU, EPU, DIGI+ VRM, Fan Xpert 4, and Turbo Core App
AI Overclocking
ASUS 5X Protection III :
- ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
- ASUS LANGuard: Protects against LAN surges, strikes and static-electricity discharges
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability
- ASUS Enhanced DRAM Overcurrent Protection - Short circuit damage prevention
- ASUS ESD Guards - Enhanced ESD protection
ASUS SafeSlot - Protect your graphics card Investment
AURA :
- Aura RGB Strip Headers
- Aura Lighting Effects Synchronization with compatible ASUS ROG devices
- Addressable Gen 2 Header
ASUS Exclusive Features :
- USB BIOS FlashBackTM
- AI Suite 3
- Ai Charger
- Onboard Button : Power
- ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- Turbo LAN
- Armoury Crate
- Pre-mounted I/O Shield
- ASUS NODE: hardware control interface
- BIOS FlashBackTM Button
ASUS Quiet Thermal Solution :
- Stylish Fanless Design with M.2 Heat-sink solution
- ASUS Fan Xpert 4
ASUS Q-Design :
- ASUS Q-Code
- ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED, HDD LED)
- ASUS Q-Slot
- ASUS Q-DIMM
- ASUS Q-Connector
Intel Virtual RAID on CPU (VROC) ready
DIY Friendly Design
- ProCool II
- SafeSlot
Back I/O Ports
1 x PS/2 keyboard/mouse combo port(s)
1 x LAN (RJ45) port(s)
4 x USB 3.2 Gen 1
2 x USB 2.0 (one port can be switched to USB BIOS FlashBackTM)
1 x Optical S/PDIF out
5 x Audio jack(s)
1 x USB BIOS FlashBackTM Button(s)
2 x USB 3.2 Gen 2 (up to 10Gbps) ports (Type-A + USB Type-CTM)
Internal I/O Ports
1 x AAFP connector
2 x Aura RGB Strip Headers
1 x Addressable Gen 2 header(s)
1 x USB 3.2 Gen 1 front panel TypeCTM connector
2 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 4 USB 3.2 Gen 1 port(s)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
1 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (SATA and PCIE 3.0 x 4 mode)
2 x M.2 Socket 3 with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)
1 x COM port(s) connector(s)
8 x SATA 6Gb/s connector(s)
1 x M.2_FAN connector
1 x VROC_HW_Key
1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
2 x Chassis Fan connector(s)
1 x W_PUMP+ connector
1 x AIO_PUMP connector
1 x Thunderbolt header (5-pin) for ASUS ThunderboltEX series support
1 x 24-pin EATX Power connector(s)
2 x 8-pin EATX 12V Power connectors
1 x Front panel audio connector(s) (AAFP)
1 x System panel(s) (Q-Connector) (Chassis intrusion header is inbuilt)
1 x Thermal sensor connector(s)
1 x Power-on button(s)
1 x Clear CMOS jumper(s)
1 x Node Connector(s)
1 x CPU_OV jumper
1 x Q-Code
Accessories
Users manual
1 x Vertical M.2 bracket set
1 x ASUS Fan Holder
4 x SATA 6Gb/s cable(s)
2 x M.2 Screw Package
1 x Supporting DVD
1 x Q-Connector
1 x Extension Cable for RGB strips (80 cm)
1 x Extension cable for Addressable LED
BIOS
128 Mb Flash ROM, UEFI AMI BIOS, PnP, SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 AI OC Guide, F6 Qfan Control, F3 My Favorites, Last Modified log, F9 Search, F12 PrintScreen, F4 AURA ON/OFF and ASUS DRAM SPD (Serial Presence Detect) memory information
Manageability
WfM 2.0, DMI 3.0, WOL by PME, PXE
Support Disc
Drivers
ASUS Utilities
EZ Update
Anti-virus software (OEM version)
Operating System
Windows 10 64-bit
Form Factor
ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )
Note
1. PCIEX1_1 shares bandwidth with Wi-Fi E Key. PCIEX1_1 is disabled by default.
PCIEX1_2 shares bandwidth with SATA6G_7. PCIEX1_2 is disabled by default.
2. PCIeX16_3 will be disabled when using 28-lane CPU.
3. The M.2_2 socket shares bandwidth with SATA6G_1 port when using M.2 SATA devices.
4. The M.2_1 PCIe mode source is from X299 Chipset when using 44 and 28-lane CPU.
5. The SATA6G_7 shares bandwidth with PCIeX1_2.
6. The M.2 PCIE mode source from X299 Chipset supports Intel Optane Memory
Item Dimension (L"xW"xH")
10 x 6 x 3
Weight
6.37 LB
Warranty Information
3 years


Package Contents:
  • Prime X299-A II Desktop Motherboard
  • User's Manual
  • 1 x Vertical M.2 Bracket Set
  • 1 x ASUS Fan Holder
  • 4 x SATA 6Gb/s cable(s)
  • 2 x M.2 Screw Package
  • 1 x Supporting DVD
  • 1 x Q-Connector
  • 1 x Extension Cable for RGB strips (80 cm)
  • 1 x Extension cable for Addressable LED

Features

Package Contents:   
  • Prime X299-A II Desktop Motherboard
  • User's Manual
  • 1 x Vertical M.2 Bracket Set
  • 1 x ASUS Fan Holder
  • 4 x SATA 6Gb/s cable(s)
  • 2 x M.2 Screw Package
  • 1 x Supporting DVD
  • 1 x Q-Connector
  • 1 x Extension Cable for RGB strips (80 cm)
  • 1 x Extension cable for Addressable LED

 

Environmentally Friendly:   
Yes

 

Environmental Compliance:   
Restriction of Hazardous Substances (RoHS)

 

Country of Origin:   
China

 

Specs

Physical Characteristics
Form FactorATX
Width12"
Depth9.6"
Warranty
Limited Warranty3 Year
I/O Expansions
Number of PCI Express x1 Slots2
Total Number of Expansion Slots5
Number of PCI Express x16 Slots3
Total Number of PCI Express Slots5
Memory
Memory TechnologyDDR4 SDRAM
Number of Memory Slots8
Memory Speed Supported
Memory Form Factor
Maximum Memory Supported256 GB
Intel Optane Memory ReadyYes
General Information
Brand NameAsus
Manufacturer Website Addresshttp://usa.asus.com
Marketing InformationIntel ATX motherboard LGA 2066 for Intel Core X-series processors, with AI Overclocking, 12 IR3555 power stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C and Aura Sync RGB lighting
Intel LGA 2066 socket: Ready for the latest Intel® Core™ X-series processors
AI Overclocking: Quickly optimizes your CPU performance based on the CPU and cooler, achieving results that are extremely close to manual tuning by experts
Robust power design: 12 IR3555 power stages, ProCool II connectors, alloy chokes and ultra-durable capacitors for stable power delivery
M.2 heatsink: Ultra-efficient heatsink reduces M.2 SSD temperatures by up to 20° C for unthrottled transfer speeds and enhanced reliability
Next-gen connectivity: Intel Optane memory ready, Intel® VROC support, dual M.2 support, and USB 3.2 Gen Type-C™
PRIME
The Prime X299-A II caters to users with serious pursuits: Those who prefer to put their high-core-count processors to more productive use. This high-end desktop board combines cutting-edge performance with our signature features, including an enhanced VRM tailored for running the CPU performance at stock speeds, intuitive cooling control, next-gen connectivity, and extensive customization.
Get the most out of all your cores
Intel®'s high-end desktop platform raises the stakes with updated Intel Core™ X-Series Processors that boast cores, cache, and bandwidth. The Prime X299-A II is ready for the additional processing power that plows through CPU-intensive tasks, and the extra bandwidth allows you to add more GPUs and NVMe SSDs to accelerate a wide range of work.
Robust Power Design
The LGA 2066 socket is compatible with Intel Core X-Series Processors with up to 18 cores, over 44 PCI Express® lanes, and 165-watt thermal design power (TDP). Those specs require serious power, so the Prime X299-A II is equipped with an enhanced power solution that includes 12 power stages that line up neatly along the top edge of the PCB.
ProCool II connector
ProCool II connectors ensure a snug and reliable connection to the EPS 12V power lines. The second-generation features upgrades of metal amour and solid pins for better heat dissipation, as well as a warning LED-display with a BIOS POST message to indicate an improper connection.
PowIRstage MOSFETS
Prime X299-A II VRM is comprised of 12 IR3555 PowIRstages®, each rated to handle 60 amps
Microfine Alloy choke
Each PowIRstage is accompanied by a high-permeability alloy-core choke rated to handle 45 amps.
Make your memory go faster
The X299 platform delivers ample bandwidth on multiple fronts. Its quad-channel memory controller supports up to 256 GB of DDR4 memory across eight slots. With optimized trace layout, the Prime X299-A II can hit memory speeds up to DDR4 4266 MHz or beyond.
Multi-GPU support
Fully loaded takes on a new meaning when you have over 44 PCI Express lanes stemming from the CPU. Those lanes can be split in an x16/x16/x8 configuration spanning the board's trio of PCIe x16 slots, allowing you to load up on GPUs to accelerate an increasingly diverse array of work.
M.2
Achieve speed with onboard M.2
Professional applications require fast solid-state storage, which is why the Prime X299-A II is equipped with three M.2 slots that are compatible with the latest NVMe SSDs. All slots support longer 110 mm drives, and they can be configured into bootable RAID arrays connected directly to the CPU via Intel VROC technology.
Product TypeDesktop Motherboard
Product NamePrime X299-A II Desktop Motherboard
ManufacturerASUS Computer International
Manufacturer Part NumberPRIME X299-A II
Product ModelX299-A II
Product LinePrime
Processor & Chipset
Chipset ManufacturerIntel
Multi GPU Supported
Processor SupportedCore X-Series
Total Processor Supported1
Processor SocketSocket R4 LGA-2066
Chipset ModelX299
Onboard Interfaces
Number of SATA Interfaces8
Total Number of Onboard USB Ports9
Number of Onboard USB 3.2 Ports5
Number of M.2 Interfaces3
Number of Onboard USB 2.0 Ports4
Interfaces/Ports
S/PDIFYes
Number of USB 3.2 Ports6
Number of USB 2.0 Ports2
Total Number of USB Ports8
I/O Controller
RAID SupportedYes
Controller TypeSerial ATA/600
Intel VROCYes
Intel RSTeYes
Intel RSTYes
RAID Levels
Video
Onboard VideoNo
Network & Communication
Gigabit EthernetYes
Audio
Audio Channels7.1

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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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Asus Prime X299-A II Desktop Motherboard - Intel Chipset - Socket R4 LGA-2066 - Intel Optane Memory Ready - ATX (primex299-aii)