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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A 24-core Intel Core Ultra 9 285K desktop with 128GB DDR5, 4TB NVMe and RTX 5070 Ti graphics, liquid-cooled in a mid-tower running Windows 11 Pro
This desktop workstation pairs a 24-core Intel Core Ultra 9 285K processor with 128GB of DDR5 memory and a 4TB NVMe solid-state drive. A GeForce RTX 5070 Ti graphics card with 16GB of video memory handles rendering and AI workloads. The system ships with Windows 11 Pro and liquid cooling in a mid-tower chassis.
The jump is worthwhile when current hardware cannot keep 128GB of DDR5 fed or when PCIe 4.0 storage reads below 7450 MB/sec. Builders still limited to 64GB of memory or slower NVMe drives will see immediate throughput gains. The 24-core CPU and 850W power supply also remove the ceiling that older platforms hit under sustained multi-threaded loads.
The Samsung 990 PRO SSD saturates the PCIe 4.0 x4 link at 7450 MB/sec read and 6900 MB/sec write; faster drives would require a newer interface. The Thermaltake 850W Bronze unit caps total system draw, so adding a second high-power GPU is not practical. Four DDR5 slots max out at 192GB, leaving one upgrade step before a platform change.
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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 | 128 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 Ti |
| Audio & video | |
| Audio chip | Integrated |
| Sound channels | 7.1 channels |
| Connectivity | |
| Wi-Fi standard | Wi-Fi 7 |
| Network speed | 2.5 Gbit/s |
| Ethernet controller | Integrated |
| Wi-Fi | 802.11be 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 case measures 475 x 245 x 463 mm and provides one 3.5-inch bay or two 2.5-inch bays for additional storage.
The radiator attaches to the front or top with the included 140 mm fans; the step often missed is connecting the pump header and ARGB cable to the motherboard before securing the block.
Memory can be expanded to 192 GB across four DDR5 slots, and three additional M.2 NVMe drives plus one SATA device are supported by the Z890 board.
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