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Arc A770 16GB vs RTX 4080 Super 16GB for Local LLMs

The RTX 4080 Super 16GB has about 31% more memory bandwidth (736 vs 560 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 31% faster on the RTX 4080 Super 16GB. Both fit the same number of catalog models at Q4/8K (25 of 61; 16 vs 16 GB VRAM). MSRP is $349 for the Arc A770 16GB vs $999 for the RTX 4080 Super 16GB. 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 (44 shared models), the RTX 4080 Super 16GB posts the higher tok/s in 44 rows vs 0. Methodology.

Spec comparison

Arc A770 16GBRTX 4080 Super 16GB
VendorIntelNVIDIA
VRAM16 GB16 GB
Memory typeGDDR6GDDR6X
Memory bandwidth560 GB/s736 GB/s
TDP225 W320 W
MSRP (list)$349$999
BuySearch Amazon (affiliate)ASUS ProArt GeForce RTX 4080 Super OC (affiliate) · More listings

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 44 shared models

ModelParams (B)Arc A770 16GB tok/sArc A770 16GB fitsRTX 4080 Super 16GB tok/sRTX 4080 Super 16GB fitsWinner
Qwen3-0.6B0.8445.5 est.Yes585.5 est.YesRTX 4080 Super 16GB
gemma-3-1b-it1.0356.4 est.Yes468.4 est.YesRTX 4080 Super 16GB
Llama-3.2-1B-Instruct1.2297.0 est.Yes390.3 est.YesRTX 4080 Super 16GB
Qwen3-30B-A3B30.5257.2 est.No338.0 est.NoRTX 4080 Super 16GB
Qwen3-Coder-30B-A3B-Instruct30.5257.2 est.No338.0 est.NoRTX 4080 Super 16GB
Qwen3-30B-A3B-Instruct-250730.5257.2 est.No338.0 est.NoRTX 4080 Super 16GB
GLM-4.7-Flash31.2246.9 est.No324.5 est.NoRTX 4080 Super 16GB
Qwen3-1.7B2.0178.2 est.Yes234.2 est.YesRTX 4080 Super 16GB
gpt-oss-20b21.599.0 est.Yes186.5 measuredYesRTX 4080 Super 16GB
Llama-3.2-3B-Instruct3.2111.4 est.Yes146.4 est.YesRTX 4080 Super 16GB
Phi-4-mini-instruct3.893.8 est.Yes123.3 est.YesRTX 4080 Super 16GB
Phi-4-mini-reasoning3.893.8 est.Yes123.3 est.YesRTX 4080 Super 16GB
gemma-3-4b-it4.391.4 est.Yes120.1 est.YesRTX 4080 Super 16GB
Qwen3-4B-Instruct-25074.089.1 est.Yes117.1 est.YesRTX 4080 Super 16GB
Qwen3-4B-Thinking-25074.089.1 est.Yes117.1 est.YesRTX 4080 Super 16GB

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

Arc A770 16GBRTX 4080 Super 16GB
Catalog models that fit25 of 6125 of 61
Largest exclusive fit——

Arc A770 16GB details → · RTX 4080 Super 16GB details →