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RTX 3070 8GB vs V100 32GB SXM2 for Local LLMs

The V100 32GB SXM2 has about 101% more memory bandwidth (900 vs 448 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 101% faster on the V100 32GB SXM2. The V100 32GB SXM2 fits more of the catalog at Q4/8K — 43 vs 16 of 73 models (32 vs 8 GB VRAM). Largest model that fits the V100 32GB SXM2 but not the RTX 3070 8GB: Qwen3.6-35B-A3B-FP8 (36.0B). MSRP is $499 for the RTX 3070 8GB vs $10,000 for the V100 32GB SXM2. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: V100 32GB SXM2 (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (43 shared models), the V100 32GB SXM2 posts the higher tok/s in 43 rows vs 0. Methodology.

Spec comparison

RTX 3070 8GBV100 32GB SXM2
VendorNVIDIANVIDIA
VRAM8 GB32 GB
Memory typeGDDR6HBM2
Memory bandwidth448 GB/s900 GB/s
TDP220 W300 W
MSRP (list)$499$10,000
BuySearch Amazon · eBay · Newegg · B&H Photo

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 43 shared models

ModelParams (B)RTX 3070 8GB tok/sRTX 3070 8GB fitsV100 32GB SXM2 tok/sV100 32GB SXM2 fitsWinner
MiniCPM5-1B1.08439.6 est.Yes895.6 est.YesV100 32GB SXM2
Qwen3.5-2B2.0237.4 est.Yes483.6 est.YesV100 32GB SXM2
DeepSeek-R1-0528-Qwen3-8B-layer-mix-bpw-3.8-mlx2.3206.4 est.Yes420.5 est.YesV100 32GB SXM2
Qwen3.6-35B-A3B36.039.3 est.No322.4 est.YesV100 32GB SXM2
Qwen3.5-35B-A3B34.742.2 est.No322.4 est.YesV100 32GB SXM2
GLM-4.7-Flash31.238.8 est.No322.4 est.YesV100 32GB SXM2
Qwen3-30B-A3B-Instruct-250730.550.3 est.No322.4 est.YesV100 32GB SXM2
Nemotron-3-Nano-Omni-30B-A3B-Reasoning-BF1630.053.8 est.No322.4 est.YesV100 32GB SXM2
Ornith-1.0-35B35.041.5 est.No322.4 est.YesV100 32GB SXM2
qwen35b-a3b-fable-sft-abliterated34.740.3 est.No322.4 est.YesV100 32GB SXM2
Llama-3.2-3B-Instruct3.2148.4 est.Yes302.3 est.YesV100 32GB SXM2
gpt-oss-20b21.585.0 est.No268.7 est.YesV100 32GB SXM2
gemma-4-26B-A4B-it25.259.2 est.No254.5 est.YesV100 32GB SXM2
Qwen3-4B-Instruct-25074.0118.7 est.Yes241.8 est.YesV100 32GB SXM2
NVIDIA-Nemotron-3-Nano-4B-BF164.0118.7 est.Yes241.8 est.YesV100 32GB SXM2

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 3070 8GBV100 32GB SXM2
Catalog models that fit16 of 7343 of 73
Largest exclusive fitQwen3.6-35B-A3B-FP8 (36.0B)

RTX 3070 8GB details → · V100 32GB SXM2 details →