Quick Answer

Running Stable Diffusion locally is all about GPU VRAM. An RTX 5070 Ti or 5080 (16GB) generates SDXL images in a few seconds in Worcester; a build in this class runs about R38,000. For larger models, more VRAM is the only thing that matters.

VRAM decides what you can run

Stable Diffusion and image models live in GPU VRAM. 12GB runs SDXL comfortably; 16GB (RTX 5070 Ti / 5080) handles higher resolutions, ControlNet and multiple LoRAs without out-of-memory errors. CUDA cores set generation speed - a 5080 produces an SDXL image in roughly 3-5 seconds versus 10+ on entry cards. The CPU matters far less here.

System RAM and fast storage

32GB DDR5 keeps the OS, model loader and image queue smooth; 64GB helps if you batch or run other tools alongside. Models are large (SDXL checkpoints are 6GB+ each), so a 2TB Gen4 NVMe (from R2,200) holds a library of checkpoints, LoRAs and VAEs with fast load times.

Cooling, delivery and Worcester notes

Image generation pegs the GPU, so good cooling keeps clocks high - Breede Valley heat makes airflow worth specifying. Evetech ships to Worcester in 1-3 working days on the N1. On arrival, install the latest NVIDIA Studio driver and run a test batch to confirm VRAM headroom and stable temps.

FAQ

How much VRAM for Stable Diffusion?

12GB runs SDXL well; 16GB (RTX 5070 Ti or 5080) is the comfortable target for high-res output, ControlNet and multiple LoRAs without memory errors.

Does the CPU matter for local AI image generation?

Far less than the GPU - generation happens on CUDA cores in VRAM. A mid-range Ryzen 5/7 is plenty; spend the budget on the most VRAM you can afford.

Is delivery to Worcester reliable for an AI rig?

Yes - Evetech ships to Worcester in 1-3 working days on the N1, with the GPU braced. Install the NVIDIA Studio driver and run a test batch on first boot.

TIP

Pro Tip

Install the NVIDIA Studio driver (not Game Ready) for Stable Diffusion in Worcester - it improves stability for long generation sessions and is the first thing to set up after delivery.