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GPU benchmark measured: the unprovable job proves in 34.2s on 32GB Blackwell - #18
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… Blackwell The last untested cell of the hardware-class table is filled. On an RTX PRO 4500 Blackwell (32 GB VRAM, driver 595.71.05, rented on vast.ai for under a dollar): - legacy meta-emulated job (168.9M zkVM cycles): PROVED in 34.2 s, peak 26.1 GB VRAM — the job that OOM-killed the 32 GB CPU host; - V2 native job (1.79M zkVM cycles): proved in 2.8 s at 10.6 GB peak VRAM — a 29x proving speedup over CPU, interactive-latency receipts; - SP1 6.8's GPU prover runs correctly on Blackwell (sm_120); - the 26.1 GB peak explains the 24 GB VRAM floor as the honest minimum for traces of this shape. Outputs byte-identical to CPU executions across all runs; receipts self-verified. Preprint Table 4 and abstract updated; all hardware envelopes are now measured, nothing projected.
…kipped jobs, which satisfy branch protection paths-ignore removed the check runs entirely, so branch protection's required checks never registered and docs-only PRs could not merge at all (even by admin bypass). Now a 5-second 'changes' job always runs and every heavy job skips via 'if' when Rust-irrelevant files only changed (.md, .ipynb, plain docs) — skipped jobs report 'skipped' and satisfy required-check protection. Workflow files, Rust sources, manifests, job/ELF artifacts, and arch-tests still trigger the full suite.
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Fills the last untested cell of the hardware-class table. Rented an RTX PRO 4500 Blackwell (32 GB VRAM, driver 595.71.05) on vast.ai for under a dollar and ran both benchmarks with VRAM logging:
Docs-only change (preprint Table 4 + abstract, DESIGN.md GPU section) — CI skipped by the paths filter.