Asus Prime X299-A II Motherboard

Asus Prime X299-A II

Brand
Asus
Model
Prime X299-A II
$274–$302estimated range · from catalog price Sep 28, 2026

ASUS Prime X299-A II (2019) is a high-end ATX LGA2066 board with triple M.2, 8-DIMM DDR4 up to 256GB, USB 3.2 Gen 2, and no onboard Wi‑Fi.

TierHigh end?GixCore tierWhat a part was built to do — not what it costs.EntryBudgetMainstreamHigh endEnthusiastFlagship A part can be cheap because it is an ageing flagship, or because it is a current entry-level model. The tier tells you which.
ReleasedAug 2019
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SocketLGA2066
ChipsetX299
MemoryDDR4
Max RAM speed4266 MHz
Form factorATX
RAM slots8
M.2 slots3
PCIe x163
GixCore Editorial

Product overview

Announced on August 20, 2019 for Intel’s refreshed X299 high‑end desktop platform, the Asus Prime X299‑A II targets LGA2066 Core X‑Series CPUs (Skylake‑X/Cascade Lake‑X). Retail availability followed in regions such as Japan from November 2019.Sourceasus.com

Positioned as a high_end ATX board, it exists to give creators and power users a stable, feature‑rich HEDT option without ROG extras. It’s genuinely good for expansion/multi‑M.2 (three onboard slots with CPU‑attached NVMe RAID via Intel VROC), overclocking (robust VRM and ASUS AI Overclocking), and high‑speed memory (eight DDR4 DIMM slots up to 256 GB and high OC speeds). Connectivity focuses on wired builds: Intel GbE and USB 3.2 Gen 2 including Type‑C; Wi‑Fi is not integrated. Unique: triple M.2 with VROC for bootable NVMe RAID.Sourceasus.com

Best for
  • overclocking
  • expansion/multi-M.2
  • high-speed memory
Official product specifications

Specifications

At a glance iEach dot represents a catalog model. Farther right means a higher measured value, not necessarily a better fit.Measured against the motherboards catalog
Current modelCatalog models
Max RAM speed4266 MHz
Higher than 11% of motherboards
RAM slots8
Higher than 97% of motherboards
M.2 slots3
Higher than 72% of motherboards
Socket
LGA2066
Memory
DDR4
WiFi
No
Integrated Graphics
No
USB
3.2
Max Memory Size
256 GB
ECC Support
No
Chipset
X299
Max RAM speed
4266 MHz
Form factor
ATX
RAM slots
8
M.2 slots
3
PCIe x16
3
Processor Generation
7, 9, 10
Pci E
3.0
M.2 drives
PCIe
Sata Slots
6
Sata Speed
6 Gb/s
Pci E Slots
5
Tdp
50 W
NVMe support
Yes
Pci E X1
1
Pci E X4
1
Cpu Brand
Intel
Pairing fit

Compatible CPUs

Compatible options ranked for this part's performance class.

Pairing fit

Compatible RAM kits

Compatible options ranked for this part's performance class.

Budget pairings6 lower-tier compatible options
Pairing fit

Compatible Cases

Compatible options ranked for this part's performance class.

Budget pairings6 lower-tier compatible options
Pairing fit

Compatible Power supplies

Compatible options ranked for this part's performance class.

Budget pairings6 lower-tier compatible options