RTX 4090
RTX 4090 vs Used RTX 3090 for Local AI: Which to Buy in 2026
Both have 24GB VRAM. One costs 2-3x more. RTX 4090 vs used RTX 3090 — real benchmarks, real prices, and who should buy which for local LLM inference and image generation.
What Can You Actually Run on 24GB VRAM?
32B models at 25-38 tok/s, 70B at Q3 with limited context, Flux at full FP16, and LoRA fine-tuning. RTX 3090 at $700 vs 4090 at $1,800—every model that fits and which GPU to buy.