There are three artifacts and they do three different jobs. This page is the single authoritative list — what each one is, how they relate, and which DOI to use.
| Artifact | Cite it for | Concept DOI (always newest) | Version DOI (pin this) |
|---|---|---|---|
| Preprint |
The argument and the measurement methodology | 10.5281/zenodo.21066652 | 10.5281/zenodo.21066654 |
| Main dataset v1.1.0 source of truth | Every number on this site except the RTX 4090 column | 10.5281/zenodo.19647289 | 10.5281/zenodo.19647290 |
| RTX 4090 (Ada) deep dive | The RTX 4090 column only — INT8 on Ada, 7B on Ada. Two sessions:
2026-07-24 (energy only; this is the session the site's RTX 4090 curve is fitted from) and
2026-08-19 (energy paired with a teacher-forcing perplexity measured in the same run — also in this
repo as
rtx4090_paired_energy_quality_2026-08-19.csv,
with what it does and does not show).
The August session's INT8 penalty is 2.0–2.5× the July session's at every model size, so the two
are archived separately, must not be pooled, and the site's curves use only the July one.
Erratum, and why the DOI moved: the superseded record 10.5281/zenodo.21528103 has a vs_fp16_pct column in rtx4090_results.csv that disagrees with that file's own
energy, power and throughput columns (worst case Qwen2.5-3B NF4: column says +10.1%, the energies say +0.8%).
The percentages are recomputed from the energy column in the record listed here. If you already cited
21528103, cite this record instead — no measurement changed, only the derived percentages. |
10.5281/zenodo.22019741 | 10.5281/zenodo.22037483 |
| Dataset v1 superseded | Nothing — kept only so old references resolve | 10.5281/zenodo.18900288 | 10.5281/zenodo.18900289 |
preprint (SSRN #6854700, Zenodo 21066652)
| states the claim and the NVML measurement protocol
|
+-- main dataset v1.1.0 (19647289 -> 19647290) ...... SOURCE OF TRUTH for this site
| 360+ configurations, 0.5B-14B, 4 architectures, FP16/NF4/INT8/FP8, n=2, CV < 2%
| supersedes dataset v1 (18900288 -> 18900289, 113 configurations)
|
+-- RTX 4090 (Ada) deep dive (22019741 -> 22037483) .. SUPPLEMENTS v1.1.0, does not replace it
1 card, produced by the open container (ecocompute-mlcube)
session 2026-07-24: 15/15 measured, 0.5B-7B x FP16/NF4/INT8, energy only, n=1
session 2026-08-19: 10 measured, 0.5B-7B x NF4/INT8, energy + paired perplexity, n=1
INT8 penalty 2.0-2.5x the July session's -> do not pool
session 2026-08-20: the 5 INT8 configurations re-run 3x each, n=3
CV of the energy delta 0.6-3.9%, i.e. 30-50x smaller than that gap
supersedes 21528102 -> 21528103 (its vs_fp16_pct column contradicted its energy column)
Concretely: supplements means the RTX 4090 run adds coverage v1.1.0 does not have (INT8 on Ada, and 7B on Ada) at a lower repeat count, so it is a deep dive rather than a replacement — and if you quote a figure from the RTX 4090 column, cite it; otherwise cite v1.1.0. Supersedes means v1 should no longer be cited: any mirror or skill listing that still says “113+ configurations” is describing v1.
Title Weight-Only Quantization Does Not Always Save Energy: An Empirical Study of LLM Inference Across NVIDIA GPU Platforms
Where SSRN #6854700 · archived copy on Zenodo
Cite it for the crossover claim, the protocol, the framing
@article{zhang_quantization_energy,
title = {Weight-Only Quantization Does Not Always Save Energy: An Empirical
Study of LLM Inference Across NVIDIA GPU Platforms},
author = {Zhang, Hongping},
year = {2026},
note = {Preprint, SSRN abstract 6854700},
doi = {10.5281/zenodo.21066654},
url = {https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6854700}
}
Published 2026-04-19 · CC BY 4.0
Contents 360+ configurations, 0.5B–14B, RTX 4090D (Ada), RTX 5090 (Blackwell), A800 (Ampere), Tesla T4 (Turing); FP16/NF4/INT8/FP8; n = 2, CV < 2%
Cite it for anything on this site except the RTX 4090 column
@dataset{zhang_ecocompute_dataset_v1_1_0,
title = {EcoCompute: Energy Efficiency Benchmark for Quantized
Language Models},
author = {Zhang, Hongping},
year = {2026},
publisher = {Zenodo},
version = {1.1.0},
doi = {10.5281/zenodo.19647290},
url = {https://doi.org/10.5281/zenodo.19647290}
}
Published 2026-08-21 (measured 2026-07-24, 2026-08-19 and 2026-08-20) · CC BY 4.0
Contents one RTX 4090, five models 0.5B–7B × FP16/NF4/INT8, 15/15 real measurements from the open container; a second session of 10 measurements pairing energy with same-run perplexity (n = 1 each); and a third session repeating the five INT8 configurations three times each (n = 3, CV of the energy delta 0.6–3.9%)
Cite it for the RTX 4090 column, INT8-on-Ada and 7B-on-Ada claims
@dataset{zhang_ecocompute_rtx4090_2026,
title = {EcoCompute --- LLM Inference Energy on NVIDIA RTX 4090 (Ada)},
author = {Zhang, Hongping},
year = {2026},
publisher = {Zenodo},
note = {Supplementary single-platform deep dive to dataset v1.1.0
(10.5281/zenodo.19647290); direct NVML, FP16/NF4/INT8, 0.5B--7B;
three sessions: energy only, energy with paired perplexity,
and INT8 repeated 3x per size (CV 0.6--3.9%);
supersedes 10.5281/zenodo.21528103},
doi = {10.5281/zenodo.22037483},
url = {https://doi.org/10.5281/zenodo.22037483}
}
estimate.js) and the optional REST API@software{zhang_ecocompute_mlcube,
title = {EcoCompute energy MLCube: reproducible LLM inference energy measurement},
author = {Zhang, Hongping},
year = {2026},
note = {MLCube-compatible measurement container; cite the commit you ran},
url = {https://github.com/hongping-zh/ecocompute-mlcube}
}
One sentence: EcoCompute is an open reproducibility project measuring how LLM quantization affects inference energy per token across GPUs and model sizes.
One paragraph: Weight-only quantization (NF4, INT8) is widely assumed to save energy because it saves memory. Direct NVML power measurements across four NVIDIA GPU architectures show that below a model-size crossover point it often costs energy instead. EcoCompute publishes those measurements, the fitted crossover curves, an interactive estimator, and — crucially — the MLCube-compatible container that produced them, so anyone with an NVIDIA GPU can reproduce or contradict the result. It is independent research, not a certified benchmark.
| Item | Link |
|---|---|
| Site | quantenergy.tech |
| Measurement container | github.com/hongping-zh/ecocompute-mlcube (Apache-2.0) |
| Main dataset (v1.1.0) | 10.5281/zenodo.19647290 (CC BY 4.0) |
| RTX 4090 (Ada) deep dive | 10.5281/zenodo.22037483 (CC BY 4.0) |
| Preprint | SSRN #6854700 |
| Preview image | quantenergy.tech/preview.png (1200×630) |
| Maintainer / contact | Hongping Zhang — hongping-zh.github.io · ORCID 0009-0000-2529-4613 · open an issue |