RTX 3090 24GB AI Workstation — Ryzen 9 7900X, 64GB DDR5, 2TB NVMe
A clean custom AM5 build for local AI, content creation, and 4K gaming, built around an RTX 3090 Founders Edition with 24GB of VRAM.
Asking $2,199 OBO. Open to reasonable offers. I can show it running before you buy.
## specs
- CPU
- AMD Ryzen 9 7900X — 12 cores / 24 threads
- GPU
- NVIDIA RTX 3090 Founders Edition — 24GB GDDR6X
- Motherboard
- B650E AM5 ATX
- Memory
- 64GB DDR5 (2x32GB) — 6400MHz kit tuned to 6000MHz for AM5 stability
- Storage
- 2TB Samsung 990 EVO Plus NVMe SSD
- Power supply
- Corsair RM850e — 850W 80+ Gold, fully modular
- Cooling
- Corsair liquid AIO CPU cooler
- Case
- Premium airflow case — tempered glass with mesh front
- Fans
- Multiple ASUS TUF case fans plus the triple-fan GPU and CPU AIO
- OS
- Windows installed. Optional Ubuntu / ComfyUI local-AI setup on request.
## what it is
This is one of the machines I actually build and run. It is an AM5 workstation put together around an RTX 3090 Founders Edition, and the reason it exists is the 24GB of VRAM. That is the spec that matters for local AI: it is enough headroom to run image and video models that fall over on 8GB, 12GB, or 16GB cards.
It is not just an AI box. The Ryzen 9 7900X and 64GB of DDR5 make it a capable creator rig for Blender, DaVinci Resolve, and the Adobe apps, and it handles 4K gaming without complaint. If you want one machine that can generate, render, game, and stream, this is a sensible way to get there without paying current-gen GPU prices.
AM5 is a live platform, not a dead end. The socket has a real upgrade path for CPUs and memory, so this is a build you can grow into rather than replace.
## good for
- ✓Local AI — ComfyUI, Stable Diffusion, SDXL and Flux image generation
- ✓AI video workflows
- ✓Blender and CUDA rendering
- ✓DaVinci Resolve, Premiere, After Effects
- ✓4K gaming
- ✓Streaming and content creation
- ✓A general creator or AI workstation
## good to know
- →Windows is installed and the machine runs. I can show it working before purchase.
- →I will set up Ubuntu with a local ComfyUI AI stack for you if you want it.
- →Local pickup or arranged handoff. Serious buyers only.