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Black mid-tower case with tempered glass side panel and liquid cooling visible inside

Adamant Custom

Adamant Custom Ryzen 9 9900X3D RTX 5080 128GB DDR5 4TB NVMe gaming PC

SKU CH-JA2K-PNSNV

A 12-core Ryzen 9 9900X3D and RTX 5080 desktop with 128GB DDR5 and a 4TB NVMe SSD, liquid-cooled in a mid-tower case running Windows 11 Pro

  • Screen sizeNo Screen
  • ProcessorAMD Ryzen 9 9000 Series
  • RAM capacity128 GB DDR5
  • SSD storage4 TB NVMe
  • GraphicsGeForce RTX 5080
  • CPU modelAMD Ryzen 9 9900 × 3D
  • 12-core Ryzen 9 9900X3D reaches 5.50 GHz for heavy workloads
  • RTX 5080 with 16 GB video memory drives 4K rendering
  • 128 GB DDR5 memory handles large datasets without swapping
  • 4 TB Samsung 990 PRO SSD delivers 7450 MB/s reads
  • 1000 W 80 PLUS Gold PSU powers all components reliably

Adamant Custom Ryzen 9 9900X3D Workstation

This Adamant Custom desktop pairs a 12-core AMD Ryzen 9 9900X3D processor with an Nvidia GeForce RTX 5080 graphics card. It ships with 128GB of DDR5 memory and a 4TB Samsung 990 PRO NVMe solid-state drive. Windows 11 Pro is pre-installed on the mid-tower chassis.

Suited to modelling, rendering and AI workloads

The liquid-cooled CPU and 1000W 80 PLUS Gold power supply support sustained multi-core performance for video editing and machine learning tasks. Buyers who need more than 128GB of memory should look elsewhere, as the board maxes out at 192GB. The single graphics card limits multi-GPU configurations.

128GB DDR5 memory capacity

Four DIMM slots are populated with high-performance DDR5 modules, leaving no free slots for easy expansion. The motherboard supports up to 192GB total, so adding capacity later requires replacing existing sticks. Verify your application's memory ceiling before ordering.

How it compares

Measured against everything we stock in Gaming PCs, at today’s prices. Recalculated every night.

Price $5,273.99
Pricier than about 87% of the 24,925 comparable items (median $2,694.99).
RAM capacity 128 GB DDR5
Higher than about 80% of the 24,338 comparable items (median 32 GB).
SSD storage 4 TB NVMe
Higher than about 70% of the 24,468 comparable items (median 2 TB).

New to this? Buying a gaming PC with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Year of release2026
Product typeBusiness Desktops & Workstations
Recommended useWorkstation
Product colorBlack
Processor
ProcessorAMD Ryzen 9 9000 Series
CPU modelAMD Ryzen 9 9900 × 3D
CPU socketAM5
Memory
RAM capacity128 GB DDR5
Memory slots4 total
Max supported RAM192 GB
Storage
SSD storage4 TB NVMe
Hard driveNo
Optical driveNo
Display
Screen sizeNo Screen
Graphics
GraphicsGeForce RTX 5080
GPU interfacePCI Express x16
Audio & video
Audio chipIntegrated
Sound channels7.1 channels
Connectivity
Wi-Fi standardWi-Fi 7
Network speed2.5 Gbit/s
Ethernet controllerIntegrated
Wi-Fi802.11be Wireless LAN
Bluetooth support5.4
Ports & slots
Ethernet port1 port
Size & build
Form factorMid Tower
Compatibility
Windows 11 supportReady
Software
Operating systemWindows 11 Pro
More details
AI capabilityAI Ready
Cooling methodLiquid Cooling

Questions about this item

What PCI Express lane width does the RTX 5080 graphics card use in this system?

The RTX 5080 connects through a PCI Express x16 slot on the PRIME X870-P motherboard, giving the GPU full 16-lane bandwidth for gaming and compute workloads.

What case dimensions and motherboard form factor determine whether this PC fits my desk space?

The Antec P20 mid-tower measures 469 mm deep, 220 mm wide and 490 mm high, and it accepts ATX boards such as the included X870-P.

How is the 240 mm liquid cooler mounted, and what step do builders often miss?

The 240 mm radiator is pre-fitted to the case with its two 120 mm fans; the step people forget is removing the protective film from the cold-plate before seating it on the Ryzen 9 9900X3D.

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