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AJA System Test vs CrystalDiskMark: catalog facts
AJA System Test	CrystalDiskMark
Free Offered as a free download from AJA's product page.	Free Freeware. The developer asks for optional donations to support development.
Windows, macOS	Windows
Results are given in video terms such as resolution and codec Shows whether a drive can sustain recording and playback	Sequential and random read, write and mixed measurements in a few clicks Peak, real-world and demo modes covering different queue depths and thread counts
Narrow focus on storage speed for video work Product page gives few technical details	Windows only Synthetic benchmarks do not always reflect how a drive feels in use
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.