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RTX A6000 48GB vs MacBook Pro M4 Max 128GB for Local LLMs

The RTX A6000 48GB has about 41% more memory bandwidth (768 vs 546 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 41% faster on the RTX A6000 48GB. The MacBook Pro M4 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 M4 Max 128GB but not the RTX A6000 48GB: DeepSeek-V4-Flash (158.1B). MSRP is $4,500 for the RTX A6000 48GB vs $4,399 for the MacBook Pro M4 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.

Spec comparison

RTX A6000 48GBMacBook Pro M4 Max 128GB
VendorNVIDIAApple
VRAM48 GB128 GB
Memory typeGDDR6LPDDR5X
Memory bandwidth768 GB/s546 GB/s
TDP300 W160 W
MSRP (list)$4,500$4,399
BuySearch Amazon (affiliate)Search Amazon (affiliate)

MSRP is the launch list price, not live retail. Buy links are Amazon affiliate links — the price after you click is the live price.

Q4 / 8K head-to-head — top 15 of 50 shared models

ModelParams (B)RTX A6000 48GB tok/sRTX A6000 48GB fitsMacBook Pro M4 Max 128GB tok/sMacBook Pro M4 Max 128GB fitsWinner
Qwen3-0.6B0.8610.9 est.Yes434.3 est.YesRTX A6000 48GB
Qwen3-Next-80B-A3B-Instruct81.3499.8 est.No115.8 est.YesRTX A6000 48GB
gemma-3-1b-it1.0488.7 est.Yes347.5 est.YesRTX A6000 48GB
Llama-3.2-1B-Instruct1.2407.3 est.Yes289.5 est.YesRTX A6000 48GB
Qwen3-1.7B2.0244.4 est.Yes173.7 est.YesRTX A6000 48GB
Qwen3-30B-A3B30.5162.9 est.Yes115.8 est.YesRTX A6000 48GB
Qwen3-Coder-30B-A3B-Instruct30.5162.9 est.Yes115.8 est.YesRTX A6000 48GB
GLM-4.7-Flash31.2162.9 est.Yes115.8 est.YesRTX A6000 48GB
Qwen3-30B-A3B-Instruct-250730.5162.9 est.Yes115.8 est.YesRTX A6000 48GB
Qwen3-Coder-Next79.7162.9 est.Yes115.8 est.YesRTX A6000 48GB
Llama-3.2-3B-Instruct3.2152.7 est.Yes108.6 est.YesRTX A6000 48GB
gpt-oss-20b21.5135.8 est.Yes96.5 est.YesRTX A6000 48GB
gpt-oss-120b120.4135.5 est.No68.1 est.YesRTX A6000 48GB
Phi-4-mini-instruct3.8128.6 est.Yes91.4 est.YesRTX A6000 48GB
Phi-4-mini-reasoning3.8128.6 est.Yes91.4 est.YesRTX A6000 48GB

est. = bandwidth-based estimate; measured = curated real benchmark that overrides the estimate. Fits = weights + KV(8K) + 1 GB overhead ≤ 95% of VRAM.

Fit coverage at Q4 / 8K

RTX A6000 48GBMacBook Pro M4 Max 128GB
Catalog models that fit39 of 6147 of 61
Largest exclusive fit—DeepSeek-V4-Flash (158.1B)

RTX A6000 48GB details → · MacBook Pro M4 Max 128GB details →