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Black mid-tower gaming desktop with tempered glass side panel, white interior accents and RGB-lit memory visible inside

Skytech

Skytech ST-LEGACY4-1686-B-AL gaming PC Ryzen 9 9900X3D RTX 5090 32GB 64GB DDR5 4TB NVMe

SKU CH-B1W3-TJEWZ MPN ST-LEGACY4-1686-B-AL

Gaming desktop with Ryzen 9 9900X3D, RTX 5090 32GB GDDR7, 64GB DDR5 6000 and 4TB NVMe SSD

  • ProcessorAMD Ryzen 9 9000 Series
  • Graphics memory32 GB GDDR7
  • RAM capacity64 GB DDR5
  • SSD storage4 TB NVMe
  • CPU modelAMD Ryzen 9 9900 × 3D
  • Memory size64 GB DDR5

Configuration Antec P1 Performance Black / 9900X3D / 5090 / 64G / 4T

Show 3 more
  • Ryzen 9 9900X3D reaches 5.5 GHz turbo for peak gaming frames
  • RTX 5090 with 32 GB GDDR7 drives 4K and VR experiences
  • 64 GB DDR5 6000 memory keeps heavy workloads smooth
  • 4 TB NVMe SSD stores a large library with fast loads
  • 1000 W Gold ATX 3.0 supply delivers stable power to all components

Skytech Legacy 9900X3D RTX 5090 gaming desktop

This pre-built gaming desktop pairs an AMD Ryzen 9 9900X3D processor with an NVIDIA GeForce RTX 5090 graphics card carrying 32 GB of GDDR7 memory. It ships with 64 GB of DDR5 6000 RGB memory and a 4 TB Gen4 NVMe solid-state drive. A 1000 W Gold-rated ATX 3.0 power supply and liquid cooling support the high-end components. Windows 11 Home is installed and the system is assembled in the USA.

Suited for 4K enthusiasts and AI workloads.

The combination of a 16-core CPU with 3D V-Cache and a flagship GPU targets gamers who want maximum frame rates at 4K resolution and creators running local AI inference. The full-size ATX chassis and 1000 W power supply require a standard mid-tower or larger case footprint. Buyers who need a small-form-factor system or a lower power draw should consider alternative configurations.

Bundled keyboard, mouse and tempered-glass case

A free gaming keyboard and mouse are included so the system is ready to use immediately. The Skytech Legacy case features tempered glass panels and a white interior finish for showcase builds. Connectivity includes HDMI and DisplayPort video outputs plus USB 2.0, 3.0 and 3.2 Gen1 ports. No additional software bundles are mentioned beyond the clean Windows 11 Home installation.

How it compares

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

Price $4,712.99
Pricier than about 83% of the 24,925 comparable items (median $2,694.99).
Graphics memory 32 GB GDDR7
Higher than about 91% of the 10,551 comparable items (median 16 GB).
RAM capacity 64 GB DDR5
Higher than about 60% of the 24,338 comparable items (median 32 GB).

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
Brand nameSkytech
Model nameSTT-LEGACY4-1686-C01-*-**
Product typeGaming & Entertainment
Year of release2025
Product colorBlack
Processor
ProcessorAMD Ryzen 9 9000 Series
CPU modelAMD Ryzen 9 9900 × 3D
CPU socketAM5
Turbo clock speed5.5 GHz
Base clock speed4.4 GHz
Memory
RAM capacity64 GB DDR5
Memory size64 GB DDR5
RAM type and speedDDR5 6000
Storage
SSD storage4 TB NVMe
Hard driveNo
Graphics
Graphics memory32 GB GDDR7
GraphicsGeForce RTX 5090
VR readyYes
Power
Power supply1000 W
Size & build
Shipping weight24.68 kg
Package size610 × 584 × 330 mm
Compatibility
Windows 11 supportReady
Software
Operating systemWindows 11 Home
More details
AI capabilityAI Ready
Cooling methodLiquid Cooling

Other versions of this model

5 more in the same range

Questions about this item

Do I need to buy a monitor with HDMI or DisplayPort to use the RTX 5090 graphics output?

Yes, the GPU provides one HDMI and one DisplayPort connection, so a display with at least one of those inputs is required.

Can I keep my current DDR5 6000 memory kits and add them to the four installed modules?

The system arrives with 64 GB of DDR5 6000 already installed; the board supports DDR5, so any extra sticks must match that speed and voltage.

How can I confirm the Ryzen 9 9900X3D is hitting its 5.50 GHz turbo clock under load?

Open a hardware monitoring tool such as Task Manager or CPU‑Z while running a heavy workload and watch the core frequency readout reach 5.50 GHz.

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