Onyx 270K RX 9070 XT Gaming PC

Core Ultra 7 270K Plus RX 9070 XT Gaming PC — Built in the UK

The Onyx 270K is a high-end gaming PC with 16GB VRAM for 4K gaming, AI workloads, and professional creative applications requiring maximum GPU memory.

The Onyx 270K is a Core Ultra 7 270K Plus RX 9070 XT gaming PC built for enthusiasts, content creators, and power users who require a system where VRAM capacity and storage performance are as important as raw frame rates. The Intel Core Ultra 7 270K Plus delivers 24 cores with a maximum turbo of 5.5GHz, paired with the AMD Radeon RX 9070 XT — a GPU that carries 16GB of GDDR6X across a wide 384-bit memory interface with 960GB/s of bandwidth. At a time when current-generation mid-range GPUs are limited to 12GB, the Onyx 270K Core Ultra 7 270K Plus RX 9070 XT gaming PC offers a genuine and meaningful VRAM advantage for the workflows and resolutions where it matters most.

4TB PCIe 5.0 NVMe — Exceptional Storage Performance

The 4TB Crucial T700 is one of the fastest consumer NVMe SSDs available, delivering sequential read speeds of up to 12,400MB/s and write speeds of up to 11,800MB/s over a PCIe Gen 5 x4 interface. Backed by Crucial’s heritage as a Micron brand and carrying a 5-year warranty, it provides not just extraordinary speed but enormous capacity — 4TB accommodates a complete game library, large project files, raw video footage, and AI datasets simultaneously without compromise. The Z890 Eagle’s dedicated PCIe 5.0 M.2 slot ensures the T700 operates at its full rated performance.

Radeon RX 9070 XT — 16GB GDDR6X at 4K

The AMD Radeon RX 9070 XT is built on RDNA 4 architecture with 4,096 stream processors and 16GB of GDDR6X across a 256-bit memory interface delivering 640GB/s of bandwidth — significantly wider and faster than the 128-bit configurations of mid-range alternatives. At 4K it delivers strong frame rates across demanding titles, and the 64MB AMD Infinity Cache further extends effective bandwidth for demanding workloads. For content creators, AI practitioners, and users working with large textures, 3D assets, or high-resolution video, the 16GB frame buffer removes the VRAM limitations that increasingly constrain 12GB cards in the most demanding applications. AMD FSR 3.1 upscaling is supported across a wide range of titles for additional frame rate headroom where needed.

Corsair 4000D RS ARGB — Premium ARGB Mid-Tower

The Corsair FRAME 4000D RS ARGB in black provides a clean, premium chassis with a high-airflow front panel and a full tempered glass side panel. Three pre-installed Corsair RS120 ARGB fans at the front provide immediate intake airflow and RGB lighting out of the box, with the Corsair Nautilus 360mm ARGB AIO top-mounted for CPU cooling. The interior layout provides excellent cable management and accommodates the RX 9070 XT’s substantial 2.9-slot profile comfortably, with GPU clearance for even the longest current-generation cards.

Wi-Fi 7, USB4 & Z890 Connectivity

The Gigabyte Z890 Eagle WiFi7 delivers comprehensive connectivity on Intel’s Z890 platform with full overclocking support for the Core Ultra 7 270K Plus. Built-in Wi-Fi 7 with Bluetooth 5.4 and a Realtek 2.5GbE wired LAN port provide fast wired and wireless networking. A USB4 Type-C port on the rear I/O supports 40Gbps data transfer and DisplayPort Alt Mode, and the board features four M.2 slots — including the PCIe 5.0 slot hosting the T700 — alongside three further PCIe 4.0 slots for future storage expansion. The 1000W Corsair RM1000e provides ample headroom for the RX 9070 XT’s 304W TBP and the 270K Plus’s 250W MTP under sustained full load.

The Onyx 270K is the right Core Ultra 7 270K Plus RX 9070 XT gaming PC for buyers who need the most VRAM available at a system price below flagship, combined with the fastest storage currently available in the consumer market. Whether you are gaming at 4K, processing large video or 3D assets, running AI workloads locally, or simply want a system that will not be constrained by VRAM capacity for years to come — the Onyx 270K is built to handle it.

Ideal for

• 4K gaming with 16GB VRAM capacity
• AI image generation in Stable Diffusion and ComfyUI
• Professional video editing and colour grading in DaVinci Resolve
• 3D rendering and large scene work in Blender
• Buyers requiring maximum VRAM for creative or AI workloads

Built and tested in the UK by Punch Technology, every system comes with a 3-year parts and labour warranty and next‑day delivery to UK mainland addresses, backed by over 30 years of PC building experience and our status as an AMD Elite System Builder.

Full Specification

What is the Onyx 270K best for?

The Onyx 270K is best suited to buyers who need the largest VRAM capacity available at this price point — 16GB of GDDR6X across a 256-bit memory bus — alongside strong 4K gaming performance and the multi-threaded productivity of the Core Ultra 7 270K Plus. At 4K it handles all current gaming titles including Cyberpunk 2077, Black Myth: Wukong, Ghost of Tsushima, Red Dead Redemption 2, Assassin’s Creed Shadows, Elden Ring, Marvel Rivals, Helldivers 2, and Microsoft Flight Simulator 2024 on high to ultra settings. AMD FSR 3.1 upscaling is supported across a wide range of titles for additional frame rate headroom.

The 16GB VRAM frame buffer delivers specific, practical advantages for workloads that current-generation 12GB cards cannot handle without VRAM errors or performance degradation. These include running large AI image generation models locally in Stable Diffusion and ComfyUI — SDXL, Flux, and larger models fit comfortably within 16GB — AI video generation and upscaling in RunwayML and Topaz Video AI, 8K RAW video colour grading in DaVinci Resolve without dropped frames, multi-stream 4K editing in Adobe Premiere Pro, high-polygon scene rendering in Blender without scene simplification, large open-world scene work in Unreal Engine 5 with Nanite and Lumen, and high-resolution sculpting in ZBrush. The Core Ultra 7 270K Plus’s 24 cores further accelerate CPU-bound tasks in all of these applications.

Buyers choosing between the Onyx 270K and the Opal 270K will find the Opal the better choice for pure gaming performance — the RTX 5080 is faster in most gaming benchmarks and supports DLSS 4 — while the Onyx 270K is the right choice where 16GB of VRAM is a specific requirement. Buyers who game primarily and have no VRAM-intensive creative or AI workloads are better served by the Opal 270K or Pearl 9700X.

Frequently Asked Questions

What is the Onyx 270K best suited for?

The Onyx 270K is designed for buyers who need maximum VRAM capacity alongside strong 4K gaming performance. For gaming, it handles all current titles at 4K on high to ultra settings, including Cyberpunk 2077, Black Myth: Wukong, Ghost of Tsushima, Red Dead Redemption 2, Elden Ring, Assassin’s Creed Shadows, Marvel Rivals, Helldivers 2, and Microsoft Flight Simulator 2024. For professional and AI workloads, the 24GB VRAM enables local AI image generation in Stable Diffusion and ComfyUI, AI video upscaling in Topaz Video AI, 8K video colour grading in DaVinci Resolve, 4K multi-stream editing in Adobe Premiere Pro, complex scene rendering in Blender, large open-world work in Unreal Engine 5, and high-resolution sculpting in ZBrush.

What resolution is the Onyx 270K designed for?

The Onyx 270K is designed primarily as a 4K gaming and creator PC. The RX 9070 XT delivers strong 4K frame rates across modern titles, and its 16GB VRAM frame buffer ensures no current game will exhaust GPU memory at any resolution. At 1440p it is significantly over-specified from a pure gaming perspective, though users who benefit from the VRAM capacity for creative workloads will find the system equally capable. AMD FSR 3.1 upscaling is supported in a wide range of games for additional frame rate headroom.

What makes the Crucial T700 SSD special?

The Crucial T700 is a PCIe Gen 5 NVMe SSD, delivering sequential read speeds of up to 12,400MB/s — roughly twice the speed of the fastest PCIe Gen 4 drives. At 4TB capacity it provides exceptional space for a complete game library, large creative project files, and AI datasets simultaneously. The Z890 Eagle’s dedicated PCIe 5.0 M.2 slot ensures the drive operates at its full rated speed, and the drive is backed by Crucial’s 5-year limited warranty. For buyers working with large files or running storage-intensive applications, the T700 represents a step-change in both speed and capacity.

Can the Onyx 270K be upgraded in the future?

Yes. The Z890 platform with the LGA1851 socket supports the Core Ultra 7 270K Plus with full overclocking capability, and three free M.2 slots — including a second PCIe 5.0 x4 slot — provide ample storage expansion. Two of the four DIMM slots are unoccupied, allowing memory upgrades to a maximum of 256GB. As with all our Intel LGA1851 systems, it is worth noting that this socket is not expected to receive further CPU generations beyond the current Core Ultra 200 series, so the upgrade path is primarily storage, memory, and GPU rather than CPU.

Who is this PC best suited for?

The Onyx 270K is best suited to buyers who specifically need 24GB of VRAM alongside strong 4K gaming performance — AI practitioners running Stable Diffusion or ComfyUI, professional video editors working with 8K footage in DaVinci Resolve, 3D artists with large scene files, and gamers who also run VRAM-intensive creative workloads. Buyers whose primary goal is gaming performance without professional creative requirements are better served by the Opal 270K.

Can this PC be configured with different components?

Yes. While the Onyx 270K is available as a fully specified system ready to order, we are happy to discuss alternative configurations — including different GPU options, additional storage, more memory, or a different operating system. Contact our team via phone, live chat, or our online enquiry form and we will be happy to provide a quote for a bespoke build.

• Corsair FRAME 4000D RS ARGB
• Intel Core Ultra 7 270K Plus 3.7/5.5GHz 24 Core CPU
• Gigabyte Z890 EAGLE WIFI7 Motherboard
• AMD Radeon RX 9070 XT 16GB
• 32GB Kingston Fury Beast DDR5 6000MHz C30 (2x16GB)
• 4TB Crucial T700 M.2 4000GB PCIE 5.0 NVMe (12400MB/R, 11800MB/W)
• Corsair NAUTILUS 360 RS ARGB Liquid CPU Cooler
• Corsair RM1000e Cybenetics Gold 1000w Modular ATX 3.1 PSU
• Built in Wi-Fi and Bluetooth
• Built in 7.1 Sound Card
• Microsoft Windows® 11 Home