Understanding VRAM Requirements
VRAM (Video RAM) is the most critical spec for AI image generation. Here's what you need for each use case:
- 4GB VRAM — SD 1.5 only with optimizations, slow, limited to small resolutions
- 8GB VRAM — SD 1.5 comfortably, SDXL with sacrifices, most popular models
- 12GB VRAM — SDXL comfortably, most LoRAs and extensions, good resolution
- 16GB VRAM — All current models, higher resolutions, multiple LoRAs simultaneously
- 24GB VRAM — Everything at maximum quality, fastest generation, future-proofed
The Real Cost of a Local AI Art Setup
The GPU is just one part of the cost. A complete local AI art setup includes:
- GPU: $500–2,000
- PC build (if needed): $400–800 additional
- Electricity: AI generation is power-hungry — 300-450W for the GPU alone
- Time: Hours of setup — CUDA installation, Python environments, model downloads
- Ongoing: Model updates, extension compatibility issues, troubleshooting
For most users generating fewer than 1,000 images per month, cloud-based AI generation is significantly more cost-effective than building and maintaining a local GPU setup.
Cloud vs. Local GPU — Which Is Right For You?
Choose local GPU if:
- You generate thousands of images per month
- You need maximum control over specific models and LoRAs
- You want to train custom models on your hardware
- You want zero internet dependency for generation
- You're building or already have a gaming PC and want dual use
Choose cloud AI (Wurt.app) if:
- You don't want to spend $500–2,000 on GPU hardware
- You use a Mac, laptop, or phone as your primary device
- You want to start generating immediately without setup
- You want the latest models without manual updates
- You want video generation alongside images in one platform
- You generate at varying rates and don't want fixed monthly costs
Recommended GPU by Use Case in 2026
Best budget pick: RTX 4060 Ti (16GB)
At ~$450-500, the 16GB version delivers the most VRAM per dollar of any current GPU. Runs SDXL comfortably, handles most LoRAs, and will remain capable for 2-3 years of model development.
Best overall: RTX 4070 Ti Super (16GB)
The sweet spot at ~$750. Significant performance improvement over the 4060 Ti while keeping 16GB VRAM. Fast enough for professional-quality local generation without the RTX 4090 price tag.
Best for power users: RTX 4090 (24GB)
If you're serious about local AI art and generate at high volume, the 4090's 24GB VRAM and fastest generation speeds justify the $1,600+ price. The only consumer GPU that runs every current AI model without compromise.