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Black mid-tower desktop with liquid cooling and RTX A400 graphics

Adamant Custom

Adamant Custom Ryzen 9 9900X 12-Core Liquid Cooled Business Desktop 64GB 4TB NVMe 10TB HDD RTX A400

SKU CH-ERRD-22ZWR

Liquid-cooled 12-core workstation with 64GB DDR5, 4TB NVMe, 10TB HDD and RTX A400 graphics for professional workloads

  • Screen sizeNo Screen
  • ProcessorAMD Ryzen 9 9000 Series
  • RAM capacity64 GB DDR5
  • SSD storage4 TB NVMe
  • GraphicsNvidia RTX A400
  • CPU modelAMD Ryzen 9 9900X
  • 12-core Ryzen 9 9900X handles heavy workloads with up to 5.20 GHz boost
  • 64 GB DDR5 memory supports large datasets and multitasking without slowdown
  • 4 TB NVMe SSD plus 10 TB HDD gives fast boot and massive project storage
  • Nvidia RTX A400 with four Mini DisplayPort outputs drives multiple professional displays
  • 240 mm liquid cooler keeps the CPU quiet under sustained load

System overview

This Adamant Custom business desktop pairs a 12-core AMD Ryzen 9 9900X processor with 64 GB of DDR5 memory and a 240 mm liquid cooler. A 4 TB NVMe drive and a 10 TB hard drive provide fast boot and deep archive storage. The Nvidia RTX A400 graphics card adds four Mini DisplayPort outputs for multi-monitor work. Windows 11 Pro 64-bit is pre-installed.

Ideal fit

The machine suits professionals who need strong single-thread speed, quiet cooling and large local storage for content creation or data analysis. Buyers who require more than 4 GB of video memory or multiple full-size DisplayPort connectors should consider a different graphics configuration. The 750 W power supply and mid-tower chassis limit future high-wattage GPU upgrades.

Deciding specification

The RTX A400 includes 4 GB of GPU memory and four Mini DisplayPort outputs. This capacity drives up to four 4K displays but restricts heavy 3D rendering or large-model AI workloads. Confirm that your software fits within this video-memory budget before ordering.

How it compares

Measured against everything we stock in Business & Office Desktops, at today’s prices. Recalculated every night.

Price $2,988.99
Cheaper than about 63% of the 2,161 comparable items (median $5,687.99).
RAM capacity 64 GB DDR5
Typical for this category: the median of 2,095 items is 64 GB.
SSD storage 4 TB NVMe
Higher than about 70% of the 2,058 comparable items (median 2 TB).

Specifications

Product
Year of release2026
Product typeBusiness Desktops & Workstations
Recommended useWork / Business
Product colorBlack
Processor
ProcessorAMD Ryzen 9 9000 Series
CPU modelAMD Ryzen 9 9900X
CPU socketAM5
Memory
RAM capacity64 GB DDR5
Max supported RAM192 GB
Storage
SSD storage4 TB NVMe
Hard drive10 TB
Optical driveNo
Display
Screen sizeNo Screen
Graphics
GraphicsNvidia RTX A400
GPU interfacePCI Express x16
VR readyYes
Audio & video
Sound channels7.1 channels
Connectivity
Wi-Fi standardWi-Fi 7
Network speed2.5 Gbit/s
Wired network2.5G Ethernet
Ethernet controllerIntegrated
Wi-Fi802.11be Wireless LAN
Bluetooth support5.4
Ports & slots
Ethernet port1 port
Size & build
Form factorDesktop
In the box
Included monitorNot included
Software
Operating systemWindows 11 Pro 64-bit
More details
Cooling methodLiquid Cooling
AI capabilityAI Ready

Questions about this item

What bandwidth does the PCI Express x16 slot provide for the RTX A400 GPU?

The graphics interface is PCI Express x16, so the RTX A400 runs at full x16 lane width for its 4 GB frame buffer and four Mini DisplayPort outputs.

Which physical bays and clearances does the Antec P10 FLUX case require for the 10 TB hard drive and 240 mm liquid cooler?

The case offers three internal 3.5" bays for the 10 TB drive and a front mount sized for a 240 mm radiator with three 120 mm fans already installed.

How is the 240 mm AIO cooler mounted on the AM5 socket, and what step is often missed?

The cooler uses the standard AM5 retention frame; the step people miss is removing the protective film from the cold-plate before securing the pump block.

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