Skytech ST-LEGACY4-1686-B-AL gaming PC Ryzen 9 9900X3D RTX 5090 32GB 64GB DDR5 4TB NVMe
- Ryzen 9 9000
- Ryzen 9 9900 × 3D
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Liquid-cooled gaming desktop with a 24-core Intel Core Ultra 9 285K, 32 GB DDR5, 4 TB NVMe SSD and GeForce RTX 5070 graphics
This desktop ships with Windows 11 Pro installed and a 24-core Intel Core Ultra 9 285K processor. Thirty-two gigabytes of DDR5 memory and a four-terabyte NVMe SSD provide capacity for large media projects. The GeForce RTX 5070 graphics card adds 12GB of video memory for rendering and gaming workloads.
A 360mm liquid cooler replaces a standard tower heatsink, keeping the 285K at its 5.70 GHz boost without thermal throttling. The jump is worthwhile when sustained multi-core loads run for hours or when acoustic levels must stay low in a studio. An 850W Bronze-rated supply delivers headroom for the full component set.
The motherboard uses the LGA 1851 socket and the cooler brackets are fitted at the factory, so no bracket swap is required. Builders should verify that the Corsair 4000D case clearance matches the 360mm radiator before ordering a replacement loop. The four M.2 slots and four SATA ports remain accessible for future storage additions.
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| Product | |
|---|---|
| Year of release | 2026 |
| Product color | Black |
| Processor | |
| Processor | Intel Core Ultra 9 (Series 2) |
| CPU model | Intel Core Ultra 9 285K |
| CPU socket | LGA 1851 |
| Memory | |
| RAM capacity | 32 GB DDR5 |
| Memory slots | 4 total |
| Max supported RAM | 192 GB |
| Storage | |
| SSD storage | 4 TB NVMe |
| Hard drive | No |
| Optical drive | No |
| Display | |
| Screen size | No Screen |
| Graphics | |
| Graphics | GeForce RTX 5070 |
| Audio & video | |
| Audio chip | Integrated |
| Sound channels | 7.1 channels |
| Connectivity | |
| Wi-Fi standard | Wi-Fi 6E |
| Network speed | 2.5 Gbit/s |
| Ethernet controller | Integrated |
| Wi-Fi | 802.11ax Wireless LAN |
| Bluetooth support | 5.4 |
| Ports & slots | |
| Ethernet port | 1 port |
| Size & build | |
| Form factor | Mid Tower |
| Compatibility | |
| Windows 11 support | Ready |
| Software | |
| Operating system | Windows 11 Pro |
| More details | |
| AI capability | AI Ready |
| Cooling method | Liquid Cooling |
The 360mm radiator mounts in the top or front of the 4000D, which supports up to 360mm radiators in both positions.
Connect the 24-pin ATX and the 8-pin EPS (CPU) cables from the 850W PSU; the 8-pin is often missed on first builds.
The Z890 UD provides four M.2 connectors, so three slots stay open for future NVMe expansion.
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