--- product_id: 266693701 title: "Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting" brand: "asus" price: "$645.27" currency: USD in_stock: true reviews_count: 5 category: "Asus" url: https://www.desertcart.us/products/266693701-asus-prime-x299-a-ii-atx-motherboard-intel-x299-lga store_origin: US region: United States of America --- # 12 IR3555 power stages for rock-solid power Triple M.2 slots for ultra-fast storage USB 3.2 Gen 2 Type-C for blazing data transfer Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting **Brand:** asus **Price:** $645.27 **Availability:** ✅ In Stock ## Summary > ⚡ Power your productivity with precision and style! ## Quick Answers - **What is this?** Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting by asus - **How much does it cost?** $645.27 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/266693701-asus-prime-x299-a-ii-atx-motherboard-intel-x299-lga) ## Best For - asus enthusiasts ## Why This Product - Trusted asus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY-Friendly Build:** Pre-mounted I/O shield, BIOS Flashback, and Asus Safe Slot make assembling and upgrading effortless and future-proof. - • **Powerhouse VRM Design:** 12 IR3555 power stages with ProCool II connectors ensure stable, efficient power delivery for extreme overclocking. - • **Next-Gen Storage Speed:** Triple M.2 slots with ultra-efficient heatsinks reduce SSD temps by up to 20°C, unlocking unthrottled transfer speeds. - • **Cutting-Edge Connectivity:** USB 3.2 Gen 2 Type-C and Intel LAN deliver seamless, high-speed data and network performance. - • **Aura Sync RGB Customization:** Industry-leading RGB lighting with addressable Gen 2 headers lets you personalize your rig to stand out in any setup. ## Overview The Asus Prime X299-A II is a high-performance ATX motherboard designed for Intel Core X-Series processors, featuring a robust 12-phase power design, triple M.2 slots with advanced cooling, DDR4 4266 MHz support, USB 3.2 Gen 2 Type-C, and customizable Aura Sync RGB lighting. Engineered for overclocking and next-gen connectivity, it offers a premium DIY-friendly experience for professionals and enthusiasts seeking reliable, cutting-edge performance. ## Description Powered by Intel Core X-Series processors, the Asus Prime X299-A II design for those who prefer to put their high-core-count processors to more productive. It combines cutting-edge performance with signature features, including a powerful VRM tailored for overclocking, intuitive cooling control, next-gen connectivity, and extensive customization. Features 12 IR3555 power stages, DDR4 4266 MHz, triple M.2, USB 3.2 Gen 2 Type-C and Aura Sync RGB lighting. Review: 曲げてしまいました． 古い経験では，CPU側にピンがあり，ピンの間隔もそれなりにあったので，ピンが曲がっても直すことができました．この機種（LGA 2066）ぐらいになると，直せないです． それで，元のマザーと単純に置き換えることが確実にできる，という主旨で，現行機種ではなくやや古い機種ではありますが，何とかこちらで見つけて，購入．ちょっと値段が高かったと思いますが，単純置き換え，を優先しました． ところで，ASUSのマザーの場合，付属DVDからドライバを入れなければなりませんね．グラボなど拡張カードの場合は，ハードウェア付属のCDやDVDは古いので使うことはない，と経験上，思っています．しかし，ASUSのマザーの場合，ASUSサイトに掲載されているドライバはあくまでアップデートだけであって，まずは付属DVDを使ってね，ということのようです． Review: The CPU pins were all fine, all components working so far after a couple weeks of use. Instructions were pretty clear on the setup. I have some experience building PCs but by no means an expert, everything was pretty standard. ## Features - Intel x299 LGA 2066 socket: ready for the latest Intel Core X Series processors to maximize connectivity and speed with up to three M.2 drives, USB 3.2 Gen 2, Intel VROC and Intel Optane Memory compatibility - Robust power design: 12 IR3555 power stages, ProCool II connectors, alloy Chokes and ultra durable capacitors for stable power delivery - Comprehensive cooling solution: ultra efficient heatsink reduces M.2 SSD temperatures by up to 20 C for unthrottled transfer speeds and enhanced reliability, an array of fan Headers, and options for water pump or AIO - Next Gen connectivity: Intel Optane Memory Ready, Intel VROC support, Dual M.2 support, Multi GPU support and USB 3.2 Gen Type C - Ai overclocking: quickly optimizes your CPU performance based on the CPU and cooler, achieving results that are extremely close to manual tuning by experts.Unmatched Personalization ASUS exclusive aura Sync RGB lighting, including RGB headers and addressable Gen 2 RGB headers.Industry leading audio: high fidelity audio with crystal sound 3, DTS sound unbound for pristine, powerful audio.Diy friendly: pre mounted I/O shield, flexkey, Asus safe Slot, Asus Node connector and BIOS Flashback for a friendlier building experience ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YD6SXF7 | | Brand | ASUS | | CPU Model | Core i9 | | Chipset Type | Intel X299 | | Compatible Devices | Personal Computer | | Compatible Processors | Intel Core i9-7900X, Intel Core i9-7920X, Intel Core i9-7940X, Intel Core i9-7960X, Intel Core i9-7980XE, Intel Core i9-9800X, Intel Core i9-9820X, Intel Core i9-9900X, Intel Core i9-9920X, Intel Core i9-9940X, Intel Core i9-9960X, Intel Core i9-9980XE | | Customer Reviews | 4.2 4.2 out of 5 stars (163) | | Global Trade Identification Number | 00192876488591 | | Graphics Card Interface | Integrated | | Item Dimensions L x W x H | 24.4L x 5.1W x 30.5H centimeters | | Item Type Name | ASUS Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 power stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting | | Item Weight | 2.05 kg | | Main Power Connector Type | 24-Pin | | Manufacturer | ASUS | | Memory Clock Speed | 2133 MHz | | Memory Slots Available | 8 | | Memory Storage Capacity | 256 GB | | Mfr Part Number | Prime X299- A II | | Model Name | Prime X299-A II | | Model Number | Prime X299-A II | | Number of Ethernet Ports | 1 | | Number of Ports | 3 | | Platform | Windows 10 | | Processor Socket | LGA 2066 | | RAM Memory Technology | DDR4 | | Ram Memory Maximum Size | 256 GB | | S/PDIF Connector Type | Optical | | System Bus Standard Supported | SATA 3 | | Total PCIe Ports | 16 | | Total SATA Ports | 1 | | Total Usb Ports | 2 | | UPC | 192876488591 | | USB 2.0 | 2 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** ASUS - **CPU socket:** LGA 2066 - **Compatible devices:** Personal Computer - **Ram memory technology:** DDR4 ## Images ![Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting - Image 1](https://m.media-amazon.com/images/I/619mrHWaYwL.jpg) ## Questions & Answers **Q: I h i9-9940x. can i use m.2_1 and m.2_3? if it is possible, can anyone show me how to set the bios for this setup? thanks in advance.** A: yes, the cpu can support, however, the bios setup is motherboard dependent. **Q: Is one of the m.2 ports favored over the other. it will be used an m.2 ssd. thanks** A: I have used the one further from the CPU for a Samsung Pro 1TB NVME SSD, and I'm getting full speed. **Q: When was this motherboard released?** A: 2019 **Q: Can you run an i9980xe on this board stock and can it handle overclocking?** A: The board can definitely handle over locking. As to that specific processor, look up the motherboard on the ASUS web site. Under its support tab there is a complete list of compatible processors as well as ram modules. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***P on 3 December 2025* 曲げてしまいました． 古い経験では，CPU側にピンがあり，ピンの間隔もそれなりにあったので，ピンが曲がっても直すことができました．この機種（LGA 2066）ぐらいになると，直せないです． それで，元のマザーと単純に置き換えることが確実にできる，という主旨で，現行機種ではなくやや古い機種ではありますが，何とかこちらで見つけて，購入．ちょっと値段が高かったと思いますが，単純置き換え，を優先しました． ところで，ASUSのマザーの場合，付属DVDからドライバを入れなければなりませんね．グラボなど拡張カードの場合は，ハードウェア付属のCDやDVDは古いので使うことはない，と経験上，思っています．しかし，ASUSのマザーの場合，ASUSサイトに掲載されているドライバはあくまでアップデートだけであって，まずは付属DVDを使ってね，ということのようです． ### ⭐⭐⭐⭐⭐ Review *by S***E on 14 January 2025* The CPU pins were all fine, all components working so far after a couple weeks of use. Instructions were pretty clear on the setup. I have some experience building PCs but by no means an expert, everything was pretty standard. ### ⭐⭐⭐⭐⭐ Review *by S***. on 7 February 2026* Fitted a treat on son's PC after trying other ones. This one finally fitted & worked well ## Frequently Bought Together - Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting - Intel Core i9-10900X Desktop Processor 10 Cores up to 4.7GHz Unlocked LGA2066 X299 Series 165W (BX8069510900X) - ARCTIC MX-4 (incl. Spatula, 4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC), Very high Thermal Conductivity, Long Durability, Safe Application --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/266693701-asus-prime-x299-a-ii-atx-motherboard-intel-x299-lga](https://www.desertcart.us/products/266693701-asus-prime-x299-a-ii-atx-motherboard-intel-x299-lga) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-20*