Architect's technical teardown: VRAM capacity, memory bandwidth, TDP, and AI throughput — compared head-to-head for local LLM workloads.
High value 12GB performer. Excellent efficiency and enough VRAM for 8B models with high-context K-V cache needs.
The legendary used-market GOAT. 24GB VRAM at a fraction of the cost of 4090/5090. Still handles 70B models with ease.
| Metric | NVIDIA GeForce RTX 4070 Super | NVIDIA GeForce RTX 3090 |
|---|---|---|
| VRAM | 12GB | 24GB |
| Memory Bandwidth | 504 GB/s | 936 GB/s |
| AI Throughput (TOPS) | 568 | 285 |
| TDP (Power Draw) | 220W | 350W |
| Est. Price | $609.99 | $749.99 |