Stable Diffusion 1.5 remains the workhorse of AI image generation — smaller, faster, and more compatible with fine-tuned checkpoints than any successor. The question is: how low can you go on hardware? We ran SD 1.5 on the RTX 3050, the most affordable GPU in the GigaGPU lineup, to find the floor.
512×512 Generation Benchmarks
| Metric | Value |
|---|---|
| Iterations/sec | 2.8 it/s |
| Seconds per image | 8.93 sec (25 steps) |
| Images per minute | 6.72 |
| Resolution | 512×512 |
| Sampler | Euler a / DPM++ 2M Karras |
| Performance rating | Very Good |
Benchmark conditions: 25-step generation at 512×512, batch size 1, FP16 precision. Using A1111 WebUI or ComfyUI backend.
Memory Footprint on 6 GB
| Component | VRAM |
|---|---|
| Model weights | 3.2 GB |
| Sampling buffer | ~0.6 GB |
| Total RTX 3050 VRAM | 6 GB |
| Free headroom | ~2.8 GB |
SD 1.5’s compact 3.2 GB footprint fits comfortably on 6 GB. You will not be running LoRA stacks or 768×768 generations without some VRAM tricks, but for standard 512×512 output the 3050 handles it cleanly. This makes it a strong candidate for dev environments or prototype servers where cost matters more than speed.
The Budget Equation
| Cost Metric | Value |
|---|---|
| Server cost | £0.25/hr (£49/mo) |
| Cost per 1K images | £0.62 |
| Images per £1 | 1613 |
Sixty-two pence for a thousand images. At £49/mo, the RTX 3050 is hard to argue with if you are bootstrapping an image generation service or running SD 1.5 for internal tools. Compare with higher-end options on our benchmark page.
Best Fit for This Hardware
The RTX 3050 is not going to win any speed contests, but 6.72 images per minute at £49/mo is genuinely useful. Prototyping, internal creative tools, low-volume print-on-demand — all solid use cases. When you outgrow it, the RTX 4060 more than doubles throughput for £20/mo extra. See our GPU comparison for Stable Diffusion.
Quick deploy:
docker run --gpus all -p 7860:7860 ghcr.io/ai-dock/stable-diffusion-webui:latest --sd15More resources: SD hosting guide, all benchmarks, Flux.1 hosting for next-gen comparison.
Deploy SD 1.5 on RTX 3050
Order this exact configuration. UK datacenter, full root access.
Order RTX 3050 Server
