ASUS PRIME X399-A AMD Threadripper TR4
Key Features of the ASUS PRIME X399-A
The ASUS PRIME X399-A is an E-ATX motherboard built for AMD's first-generation Ryzen Threadripper processors on the TR4 socket. It combines a robust 11-phase DIGI+ VRM, eight DDR4 DIMM slots supporting quad-channel memory up to 128GB and speeds up to 3600MHz (O.C.), and extensive expansion options. With four PCIe 3.0 x16 slots, dual M.2 NVMe slots, a U.2 port, and six SATA 6Gb/s ports, it offers flexibility for high-end desktops and workstations.
Performance and Overclocking
Real-world benchmarks from SiSoftware show the PRIME X399-A handling top-tier Threadripper CPUs like the 2970WX (24 cores) and 1950X (16 cores) with excellent performance, often ranking in the top 1% of results. The board supports overclocking, though professional reviews note that VRM temperatures can reach 90-100°C under heavy overclocking with high-core-count chips, so adequate airflow is essential. The 11-phase power design and 8-pin EPS connectors provide stable power delivery for moderate overclocks.
Connectivity and Expansion
Storage options are plentiful: two M.2 slots (one vertical for 22110 drives), a U.2 connector, and six SATA ports with RAID 0/1/5/10 support. Networking is handled by an Intel I211-AT Gigabit LAN controller. The back panel includes USB 3.1 Gen 2 Type-A and Type-C, eight USB 3.1 Gen 1 ports, and BIOS Flashback for easy updates. ASUS Aura RGB lighting and Fan Xpert 4 provide customization and cooling control.
Target Audience and Use Cases
This motherboard is ideal for users building a Threadripper-based workstation or high-end desktop on a budget. It's well-suited for content creation, 3D rendering, video editing, and multi-GPU setups (SLI/CrossFireX). However, those planning extreme overclocks with 24+ core CPUs may want a board with stronger VRM cooling. The PRIME X399-A remains a solid choice for its price, offering a balance of features and performance.
Key Specifications
Detailed Parameters
- Platform:
- AMD
- Socket:
- TR4
- RAM Type:
- DDR4
- Number of RAM Slots:
- 8
- Maximum RAM/slot:
- 16
- Maximum RAM Capacity in GB:
- 128
- PCI Express Version:
- 3
- Form Factor:
- E-ATX
- Maximum RAM Speed in MHz:
- 3600
- ECC:
- Yes
- Chipset:
- X399
- SupportedPlatforms:
- AMD Workstation
Pros
- Excellent value for a Threadripper motherboard
- Robust 11-phase VRM for stable power delivery
- Eight DIMM slots support up to 128GB quad-channel DDR4
- Dual M.2 NVMe and U.2 for high-speed storage
- Comprehensive connectivity including USB 3.1 Gen 2 Type-C
Cons
- VRM can run hot under heavy overclocking with high-core CPUs
- No built-in Wi-Fi
- U.2 port may be unnecessary for most users