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AI & Gaming PC Build 2026: RTX 3090 24GB

High-performance PC for local AI models & gaming, featuring RTX 3090 24GB GPU, Ryzen 7 7800X, 32GB DDR5 RAM, and 2TB NVMe SSD. UK Build 2026.

Components

CPU
AMD Ryzen 7 7800X
GPU
MSI GeForce RTX 3090 Suprim X 24G (Refurbished)
RAM
Corsair Vengeance 32GB (2 x 16GB) DDR5 6000MHz CL36
Motherboard
ASUS ROG Strix B650-A Gaming WiFi
Storage
Samsung 970 EVO Plus 2TB NVMe SSD
PSU
Corsair RM850x 850W 80+ Gold
Case
NZXT H510 Elite Mid-Tower Black/Red
CPU Cooler
Noctua NH-D15 Chromax.Black

Why this build?

This PC build is optimized for users prioritizing maximum VRAM for local AI model inference, specifically targeting large language models. The centerpiece is the refurbished MSI GeForce RTX 3090 Suprim X 24G, selected for its substantial 24GB of VRAM, which is crucial for running larger, more complex AI models at higher quality settings. While refurbished, the inclusion of a warranty from a reputable source mitigates risk. The AMD Ryzen 7 7800X CPU offers excellent performance for AI workloads without bottlenecking the GPU, and its AM5 platform ensures future upgradeability for next-generation processors.

System RAM is handled by 32GB of Corsair Vengeance DDR5 6000MHz CL36, providing ample memory for AI tasks and multitasking. A 2TB Samsung 970 EVO Plus NVMe SSD ensures fast loading times for models and datasets. The ASUS ROG Strix B650-A Gaming WiFi motherboard offers a robust foundation with modern features and future-proofing capabilities. For cooling, the Noctua NH-D15 Chromax.Black provides exceptional air cooling, capable of maintaining stable temperatures under sustained high loads typical of AI inference and potential light crypto mining.

The Corsair RM850x 850W 80+ Gold PSU delivers reliable and efficient power, with headroom for potential future GPU upgrades. The NZXT H510 Elite case offers a good balance of airflow and aesthetics, fitting the requested black and red theme. This build is ideal for AI enthusiasts, researchers, and developers who need significant VRAM for local model execution, with the added benefit of strong gaming performance and upgrade potential for years to come.

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AI & Gaming PC Build 2026: RTX 3090 24GB | AI PC Building | AI PC Building