Architect's technical teardown: VRAM capacity, memory bandwidth, TDP, and AI throughput — compared head-to-head for local LLM workloads.
The previous generation's king. 24GB VRAM and high CUDA counts remain the industry standard for consumer AI development.
AMD RDNA 4 architecture optimized for price-to-VRAM performance. Strong choice for Linux-based ROCm AI workloads.
| Metric | NVIDIA GeForce RTX 4090 | AMD Radeon RX 9070 XT |
|---|---|---|
| VRAM | 24GB | 16GB |
| Memory Bandwidth | 1008 GB/s | 640 GB/s |
| AI Throughput (TOPS) | 1321 | 389 |
| TDP (Power Draw) | 450W | 250W |
| Est. Price | $1,799.00 | $579.99 |