Tiny LLM Benchmark: Jetson Orin Nano Super 8GB - Four Power Modes × Eight Models

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Summary

A deep benchmark of 8 tiny LLMs (135M to 1B parameters) on a $250 Jetson Orin Nano Super across four power modes finds 25W to be Pareto-optimal, with SmolLM2-135M achieving 165.1 tok/s and best efficiency.

Just released a deep benchmark of 8 tiny LLMs (135M → \~1B) on a $250 Jetson Orin Nano Super 8GB using llama.cpp CUDA - across all 4 power modes: 7W, 15W, 25W, and MAXN Hardware: * NVIDIA Ampere GPU - 1024 CUDA cores, 32 Tensor cores * 6× Arm Cortex-A78AE CPU @ 1.728 GHz * 8 GB LPDDR5 @ 204.8 GB/s (unified CPU + GPU - no VRAM split) * Active fan cooling - peak junction temp stayed ≤ 73 °C across every run Stack: * JetPack R36.4.7 (Ubuntu 22.04), CUDA 12.6 * llama.cpp CUDA backend, all layers on GPU (-ngl 99) * Load: NVIDIA aiperf — 20 requests per combo, 12 prompt × gen combos per model * Power measured via tegrastats VDD\_CPU\_GPU\_CV rail at 500ms intervals Brief methodology: * Sweep: prompt ∈ {128, 512, 1024, 2048} tokens × gen ∈ {64, 128, 256} tokens × 4 power modes = 384 benchmark cells per model, 8 models. * Key metric: output tok/J = tokens generated per joule of compute energy Findings: - Key finding: 25W is the Pareto-optimal mode for every model we have tested. - 36–47% more tok/s than 15W - 3–26% better output tok/J than 15W - 8–35% better output tok/J than even MAXN (highest power mode) - More clocks ≠ more efficiency. MAXN costs ~17% more power for marginal throughput gains. Sub-1B standouts at 25W (ctx=2048, gen=256): - SmolLM2-135M - 165.1 tok/s, 22.6 output tok/J (best in suite), 101 MB, ~5.4W - LFM2.5-350M - 115.1 tok/s in 219 MB. Matches SmolLM2-360M (369 MB) at less than half the size ~1B class at 25W (ctx=2048, gen=256): - LFM2.5-1.2B: 54.1 tok/s, 5.26 output tok/J, 698 MB - fastest + best output tok/J in class - Gemma3-1B: edges ahead on total tok/J (118.5 vs LFM's 116.2) - lower power draw (6.87W vs 8.46W) compensates for slower decode - Llama3.2-1B: 47.0 tok/s, 4.67 output tok/J Full blog with all charts, heatmaps, latency tables, and raw HuggingFace datasets (384 cells × 4 modes) linked in the blog! Do check it out — and if you have a Jetson, what are you running on it? Would love to know! [Blog](https://www.smolhub.com/posts/jetson-nano-super-benchmark-non-reasoning/)
Original Article

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