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Arc Pro B70 32GB vs RTX 3080 10GB for Local LLMs

The RTX 3080 10GB has about 25% more memory bandwidth (760 vs 608 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 25% faster on the RTX 3080 10GB. The Arc Pro B70 32GB fits more of the catalog at Q4/8K — 39 vs 17 of 69 models (32 vs 10 GB VRAM). Largest model that fits the Arc Pro B70 32GB but not the RTX 3080 10GB: Qwen3.6-35B-A3B (36.0B). MSRP is $999 for the Arc Pro B70 32GB vs $699 for the RTX 3080 10GB. 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 (39 shared models), the RTX 3080 10GB posts the higher tok/s in 29 rows vs 10. Methodology.

Spec comparison

Arc Pro B70 32GBRTX 3080 10GB
VendorIntelNVIDIA
VRAM32 GB10 GB
Memory typeGDDR6GDDR6X
Memory bandwidth608 GB/s760 GB/s
TDP225 W320 W
MSRP (list)$999$699
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 39 shared models

ModelParams (B)Arc Pro B70 32GB tok/sArc Pro B70 32GB fitsRTX 3080 10GB tok/sRTX 3080 10GB fitsWinner
MiniCPM5-1B1.08358.2 est.Yes447.8 est.YesRTX 3080 10GB
Qwen3.5-2B2.0193.5 est.Yes241.8 est.YesRTX 3080 10GB
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx2.3168.2 est.Yes210.3 est.YesRTX 3080 10GB
gpt-oss-20b21.5107.5 est.Yes208.0 est.NoRTX 3080 10GB
Llama-3.2-3B-Instruct3.2120.9 est.Yes151.1 est.YesRTX 3080 10GB
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF1630.0129.0 est.Yes149.1 est.NoRTX 3080 10GB
gemma-4-26B-A4B-it25.2101.8 est.Yes148.3 est.NoRTX 3080 10GB
Qwen3-30B-A3B-Instruct-250730.5129.0 est.Yes135.7 est.NoRTX 3080 10GB
GLM-4.7-Flash31.2129.0 est.Yes130.2 est.NoRTX 3080 10GB
Qwen3.6-35B-A3B36.0129.0 est.Yes105.1 est.NoArc Pro B70 32GB
Qwen3.5-35B-A3B34.7129.0 est.Yes112.8 est.NoArc Pro B70 32GB
Ornith-1.0-35B35.0129.0 est.Yes105.4 est.NoArc Pro B70 32GB
qwen35b-a3b-fable-sft-abliterated34.7129.0 est.Yes107.1 est.NoArc Pro B70 32GB
Qwen3-4B-Instruct-25074.096.7 est.Yes120.9 est.YesRTX 3080 10GB
NVIDIA-Nemotron-3-Nano-4B-BF164.096.7 est.Yes120.9 est.YesRTX 3080 10GB

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 Pro B70 32GBRTX 3080 10GB
Catalog models that fit39 of 6917 of 69
Largest exclusive fitQwen3.6-35B-A3B (36.0B)—

Arc Pro B70 32GB details → · RTX 3080 10GB details →