Retracted on 20 September 2026.
This article claimed we had benchmarked an NVIDIA H200 inside an Intel TDX trust domain against bare metal, and it published a table of figures: 720 ms against 755 ms to first token, 120.4 against 114.8 tokens per second, a 4 to 6 percent throughput overhead, down from 12 percent a year earlier. It cited a specific TDX firmware build to back that up.
We never ran that benchmark
There is no log, no bundle and no raw output behind any of those numbers. Four things make that plain:
- Our first verified H200 attestation inside a trust domain is dated 4 September 2026, nearly four months after this article was published on 17 May 2026.
- Our public evidence folder contains attestation bundles only. It has never contained a performance measurement.
- Two of the pages this article linked to have never existed on our site.
- The hourly price it quoted has never been one of our prices.
We are withdrawing the figures rather than correcting them, because there is nothing to correct. They were not measured. Leaving them visible with a note on top, the way we handled a genuinely mistaken explanation in our NVSwitch article, would only keep publishing invented data.
What we do publish, and can prove
Attestation evidence. Every SKU we have verified, with its date and its raw bundle, is listed at /api/attestation/evidence and mirrored in a public git repository.
Those bundles hold unedited terminal output with checksums, including the runs that failed: the NVLink fabric on our 8-GPU nodes is still not attestable from the tenant guest, we say so, and we publish the logs that show exactly where it breaks.
You do not have to take our word for any of it. The voltage-verify CLI is open source under MIT, and you can generate and check both proofs yourself inside a VM you rent, on a nonce you choose. We are not in that trust chain.
Plain URLs, if you prefer to copy them:
- https://voltagegpu.com/api/attestation/evidence
- https://github.com/Jabsama/confidential-gpu-attestation-evidence
- https://github.com/Jabsama/voltage-verify
What a benchmark from us will look like
If we publish performance numbers in future, they will ship with the exact hardware, the driver and software versions, the model, the batch size and sequence lengths, the number of runs, the date, the provider of the bare-metal baseline, and the raw logs, so that anyone can replay them and get the same answer.
Until that exists, we quote no performance ratio. On the pricing page we now compare on price, on availability, and on who generates the attestation, because those are the three things we can actually show you.