Thermaltake LCGS Reactor 9890S Gaming Desktop (AMD Ryzen™ 7 9800X3D, ToughRam 32GB DDR5 6000MT/s RGB Memory, NVIDIA® GeForce RTX™ 5090, 2TB NVMe M.2, WiFi, Windows 11) T6WT-X870-590-LCS
*Price sourced from Amazon.com. Last updated 2026-07-09. Price and availability subject to change.
Bottom line: The Thermaltake LCGS Reactor 9890S Gaming Desktop (AMD Ryzen™ 7 9800X3D, ToughRam 32GB DDR5 6000MT/s RGB Memory, NVIDIA® GeForce RTX™ 5090, 2TB NVMe M.2, WiFi, Windows 11) T6WT-X870-590-LCS is a niche pick — read recent reviews before buying in the prebuilt gaming pcs category, priced around $5699.99. Read recent reviews carefully before committing.
What better way to power your battle station than the Reactor 9890S. Its unique octagonal prism shape isn't just a statement piece; it's a testament to innovation, designed to offer superior cooling and performance. Powered by the formidable AMD Ryzen™ 7 9800X3D processor and the revolutionary RTX 5090 graphics card, this gaming behemoth delivers unmatched performance for an immersive gaming experience. With 32GB of high-speed 6000MT/s Memory and a massive 2TB NVMe SSD, say goodbye to load times and hello to instant action.
SpecPicks Verdict
SpecPicks classifies Thermaltake LCGS Reactor 9890S Gaming Desktop (AMD Ryzen™ 7 9800X3D… as a niche pick — read recent reviews before buying in the prebuilt gaming pcs category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for prebuilt gaming pcs of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ NVIDIA GeForce RTX 5090, Display Port/HDMI
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- AMD Ryzen 7 9800X3D CPU, AMD X870 Chipset motherboard, 32GB DDR5 6000MT/s RGB, 2TB NVMe M.2, WiFi, Windows 11
- NVIDIA GeForce RTX 5090, Display Port/HDMI
- Enjoy Panoramic Views with 3mm TG Front panels and Excellent Airflow with Perforated Side Panels
- Closed Loop Liquid Cooling with 360mm Radiator
- Chassis I/O - 1x Type C, 2x USB 3.0, 1x Headphone, 1x Mic Ports
Full Specifications
| Brand | Thermaltake |
|---|---|
| Color | White |
| Material | Tempered Glass |
| Case Type | Tower |
| Model Name | Reactor 9890S |
| Connectivity | USB, WiFi |
| Model Number | T6WT-X870-590-LCS |
| Built-In Media | RGB Lighting |
| Cooling Method | Water |
| Mfr Part Number | T6WT-X870-590-LCS |
| Antenna Location | Gaming |
| Compatible Devices | ATX components |
| Enclosure Material | Tempered Glass |
| Total USB 2.0 Ports | 10 |
Ready to buy?
Thermaltake LCGS Reactor 9890S Gaming Desktop (AMD Ryzen™ 7 9800X3D, ToughRam 32GB DDR5 6000MT/s RGB Memory, NVIDIA® GeForce RTX™ 5090, 2TB NVMe M.2, WiFi, Windows 11) T6WT-X870-590-LCS is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-09. Price and availability subject to change.
Related Prebuilt Gaming PCs
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- How to Build a Windows 98 Retro PC in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- Best Retro Handhelds in 2026 — From $35 to $500
- Best 1440p Gaming GPUs in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
More reviews from the SpecPicks archive
Browse all reviews →- Best Retro-PC Storage & Drive-Imaging Kit in 2026: 5 Picks
- SteamOS Boots on Intel: Enthusiast Hack Breaks Valve's AMD-Only Grip
- ASUS ROG Zephyrus G1 OLED RTX 5070 Drops $575 This Week — Is It the Right Buy?
- Best 4K Gaming Monitors Under $500 in 2026
- RTX 3060 12GB in 2026: Is It Still a 1080p Value Champion?
- Why a Game Boy Clone Ran Too Fast — and the DIY Fix Makers Are Building
- Linux Driver to Expose Voltage Inputs for Raspberry Pi SBCs: What Tinkerers Get
- Tencent Hunyuan-MT 440MB On-Device Translator: Which Phones and SBCs Can Actually Run It?
- Qualcomm Enters the Data-Center Market With Its Own AI Processor
- Grok Imagine 1.5 Shipped 720p Video — Run Local Image/Video Gen Instead
- Best Mechanical Keyboard for Office and Hybrid Coding in 2026
- Best Capture Setup for Console Streaming in 2026: Elgato Cam Link 4K + PS4 Pro
- Using Claude to Drive Period-Correct Win98 Driver Installs on Voodoo and GeForce 4 Hardware
- From AWE32 to BlasterX G6: The Sound Blaster Lineage for Modern Retro Rigs
- Best Webcam for Twitch Streaming on a Budget in 2026
- Microsoft's SkillOpt Boosts GPT-5.5 With Just a Trained Markdown File
- Best Budget Gaming PC Parts Under $700 in 2026
- How to Host a Quake 3 Arena Server in 2026: Modern Setup for Classic LAN Play
- What Fits in 12GB VRAM? RTX 3060 Local LLM Model Guide (2026)
- No GPU Required? Testing Local LLM Inference on the Ryzen 5 5600G iGPU
- Raspberry Pi 5 16GB for Local LLMs: What Models Actually Fit?
- Intel llm-scaler-vllm 1.4: What Arc Pro B70 Support Means for Sub-$1500 Local Inference
- Imaging a Vintage IDE Drive to CompactFlash for a Silent Win98 Boot
- Intel Kills BigDL: The Best Local-LLM Stack to Switch To in 2026