RTX A6000 48GB vs MacBook Pro M3 Max 128GB for Local LLMs
The RTX A6000 48GB has about 92% more memory bandwidth (768 vs 400 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 92% faster on the RTX A6000 48GB. The MacBook Pro M3 Max 128GB fits more of the catalog at Q4/8K — 47 vs 39 of 61 models (128 vs 48 GB VRAM). Largest model that fits the MacBook Pro M3 Max 128GB but not the RTX A6000 48GB: DeepSeek-V4-Flash (158.1B). MSRP is $4,500 for the RTX A6000 48GB vs $4,199 for the MacBook Pro M3 Max 128GB. 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 (50 shared models), the RTX A6000 48GB posts the higher tok/s in 47 rows vs 3. Methodology.