RTX 6000 Ada 48GB vs RX 7700 XT 12GB for Local LLMs
The RTX 6000 Ada 48GB has about 122% more memory bandwidth (960 vs 432 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 122% faster on the RTX 6000 Ada 48GB. The RTX 6000 Ada 48GB fits more of the catalog at Q4/8K — 39 vs 18 of 61 models (48 vs 12 GB VRAM). Largest model that fits the RTX 6000 Ada 48GB but not the RX 7700 XT 12GB: Qwen3-Coder-Next (79.7B). MSRP is $6,800 for the RTX 6000 Ada 48GB vs $449 for the RX 7700 XT 12GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. In the Q4/8K head-to-head below (40 shared models), the RTX 6000 Ada 48GB posts the higher tok/s in 33 rows vs 7. Methodology.