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Item#: 9SIC5MVKTR5305
$723.00
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ASUS Prime X299-A II LGA 2066 Intel X299 ATX Intel Motherboard
- Prime X299-A II
- Prime X299-Deluxe II
- Prime X299 Edition 30
- ROG RAMPAGE VI EXTRME OMEGA
- ROG Strix X299-E Gaming
- ROG Strix X299-E Gaming II
- TUF X299 Mark 2
- WS X299 PRO
- WS X299 PRO/SE
- WS X299 SAGE
- Intel X299
- Intel Socket 2066 Core X-Series Processors
- DDR4 4266(O.C.)/ 4200(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3600(O.C.)/ 2666/ 2400/ 2133 MHz Non-ECC, Un-buffered Memory
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Overview
Specs
Reviews (127)
Learn more about the ASUS X299-A II
| Brand | ASUS |
|---|---|
| Series | Prime |
| Model | X299-A II |
| CPU Socket Type | LGA 2066 |
|---|---|
| CPU Type | Intel Socket 2066 Core X-Series Processors * Refer to www.asus.com for CPU support list |
| Supported CPU Technologies | Turbo Boost Technology 3.0 * The Intel Turbo Boost Max Technology 3.0 support depends on the CPU types |
| Chipset | Intel X299 |
|---|
| Number of Memory Slots | 8x288pin (DDR4) |
|---|---|
| Memory Standard | DDR4 4266(O.C.)/ 4200(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3600(O.C.)/ 2666/ 2400/ 2133 MHz Non-ECC, Un-buffered Memory * Hyper DIMM support is subject to the physical characteristics of individual CPUs. * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists). |
| Maximum Memory Supported | 256GB |
| PCI Express 3.0 x16 | 44-Lane CPU: 3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8) 28-Lane CPU: 2 x PCIe 3.0/2.0 x16 (x16, x16/x8)* * PCIeX16_3 will be disabled when using 28-lane CPU. |
|---|---|
| PCI Express x1 | 2 x PCIe 3.0/2.0 x1 * * PCIEX1_1 shares bandwidth with USB 3.2 Gen 2 front panel connector (U31G2_E1). It is disabled by default. * PCIEX1_2 shares bandwidth with SATA6G_7. |
| Other Slots | 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. |
| Serial ATA (SATA) | 8 x SATA 6Gb/s port(s)* * The SATA6G_7 shares bandwidth with PCIeX1_2. |
|---|---|
| M.2 | Intel X299 Chipset: 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x4 mode)* 1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x4 mode)** Intel Core 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 x4 mode) * The M.2_2 socket shares bandwidth with SATA6G_1 port when using M.2 SATA devices. ** The M.2_1 PCIe mode source is from X299 Chipset when using 44 and 28-lane CPU. |
| Intel Optane Ready | Yes * The M.2 PCIE mode source from X299 Chipset supports Intel Optane Memory |
| SATA RAID | 0/1/5/10 |
| Audio Chipset | Realtek S1220A High Definition Audio CODEC |
|---|---|
| Audio Channels | 8 Channels |
| LAN Chipset | Intel I219-V |
|---|---|
| Max LAN Speed | 1Gbps |
| 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 Flashback) 1 x Optical S/PDIF out 5 x Audio jack(s) 1 x USB BIOS Flashback Button(s) 2 x USB 3.2 Gen 2 (up to 10Gbps) ports (Type-A + USB Type-C) |
|---|
| Onboard USB | 1 x USB 3.2 Gen 2 front panel 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) |
|---|---|
| Other Connectors | 1 x Aura Addressable Strip Header(s) 1 x AAFP connector 2 x Aura RGB Strip Header 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 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 |
| Form Factor | ATX |
|---|---|
| LED Lighting | RGB |
| Dimensions (W x L) | 12.0" x 9.6" |
| Power Pin | 1 x 24-pin EATX Power connector(s) 2 x 8-pin EATX 12V Power connectors |
| Features | 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 CrossFireX Technology Supports AMD 3-Way CrossFireX Technology 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, lightning 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 - Aura Addressable Strip Header(s) ASUS Exclusive Features: - USB BIOS Flashback - 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 Flashback 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 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 |
|---|
| Package Contents | Accessories: 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 (80cm) 1 x Extension cable for Addressable LED |
|---|
| First Listed on Newegg | March 12, 2026 |
|---|
Customer Reviews of the ASUS X299-A II
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