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H100 80GB SXM5 vs Mac Studio M2 Ultra 192GB for Local LLMs

The H100 80GB SXM5 has about 319% more memory bandwidth (3,350 vs 800 GB/s). Batch-1 decode tracks bandwidth closely, so a model that fits both cards should decode roughly 319% faster on the H100 80GB SXM5. The Mac Studio M2 Ultra 192GB fits more of the catalog at Q4/8K — 50 vs 46 of 61 models (192 vs 80 GB VRAM). Largest model that fits the Mac Studio M2 Ultra 192GB but not the H100 80GB SXM5: Qwen3-235B-A22B (235.1B). MSRP is $30,000 for the H100 80GB SXM5 vs $6,999 for the Mac Studio M2 Ultra 192GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. Not retail-shoppable: H100 80GB SXM5 (datacenter-class; cloud rental is the realistic way to use it). In the Q4/8K head-to-head below (54 shared models), the H100 80GB SXM5 posts the higher tok/s in 50 rows vs 4. Methodology.

Spec comparison

H100 80GB SXM5Mac Studio M2 Ultra 192GB
VendorNVIDIAApple
VRAM80 GB192 GB
Memory typeHBM3LPDDR5
Memory bandwidth3,350 GB/s800 GB/s
TDP700 W370 W
MSRP (list)$30,000$6,999
Buy—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 54 shared models

ModelParams (B)H100 80GB SXM5 tok/sH100 80GB SXM5 fitsMac Studio M2 Ultra 192GB tok/sMac Studio M2 Ultra 192GB fitsWinner
Qwen3-0.6B0.82664.8 est.Yes636.4 est.YesH100 80GB SXM5
gemma-3-1b-it1.02131.8 est.Yes509.1 est.YesH100 80GB SXM5
Llama-3.2-1B-Instruct1.21776.5 est.Yes424.2 est.YesH100 80GB SXM5
Qwen3-1.7B2.01065.9 est.Yes254.5 est.YesH100 80GB SXM5
Qwen3-30B-A3B30.5710.6 est.Yes169.7 est.YesH100 80GB SXM5
Qwen3-Coder-30B-A3B-Instruct30.5710.6 est.Yes169.7 est.YesH100 80GB SXM5
GLM-4.7-Flash31.2710.6 est.Yes169.7 est.YesH100 80GB SXM5
Qwen3-30B-A3B-Instruct-250730.5710.6 est.Yes169.7 est.YesH100 80GB SXM5
Qwen3-Next-80B-A3B-Instruct81.3710.6 est.Yes169.7 est.YesH100 80GB SXM5
Qwen3-Coder-Next79.7710.6 est.Yes169.7 est.YesH100 80GB SXM5
Llama-3.2-3B-Instruct3.2666.2 est.Yes159.1 est.YesH100 80GB SXM5
gpt-oss-20b21.5592.2 est.Yes116.1 measuredYesH100 80GB SXM5
Phi-4-mini-instruct3.8561.0 est.Yes134.0 est.YesH100 80GB SXM5
Phi-4-mini-reasoning3.8561.0 est.Yes134.0 est.YesH100 80GB SXM5
gemma-3-4b-it4.3546.6 est.Yes130.5 est.YesH100 80GB SXM5

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

H100 80GB SXM5Mac Studio M2 Ultra 192GB
Catalog models that fit46 of 6150 of 61
Largest exclusive fit—Qwen3-235B-A22B (235.1B)

H100 80GB SXM5 details → · Mac Studio M2 Ultra 192GB details →