Best SSD Benchmark Tools: Which One to Use for Each Job
“What is the best SSD benchmark?” is the wrong question, because the tools do different jobs. One gives you a single comparable score, one gives you configurable raw speed tests, one reads drive health instead of speed, one is the vendor’s own transfer-size sweep, and one serves a completely different operating system. This overview sorts the major tools by the job each does best, so you can pick by need instead of by habit. Every Windows tool mentioned here is free or has a free tier, and our own focus tool, AS SSD Benchmark, is on the download page.
The tools at a glance
AS SSD Benchmark — the total score. A Windows freeware classic (final version 2.0.7316.34247, January 2020) that measures sequential, 4K, 4K-64Thrd and access time, adds Copy and Compression tests, and compresses everything into a Read/Write/Total score with a simplified formula. Pick it when you want one comparable number and the alignment and controller display in its window.
CrystalDiskMark — the general-purpose standard. Actively maintained (9.0.3, 24 May 2026), free under the MIT licence, built on Microsoft DiskSpd, and configurable in queues and threads. Pick it for a current, flexible speed check; see AS SSD Benchmark vs CrystalDiskMark for how its results relate to AS SSD’s.
CrystalDiskInfo — the health monitor. Not a benchmark at all: it reads SMART data and reports health status, temperature and wear indicators. Pick it whenever the question is “is my drive okay?” rather than “how fast is it?” — the division of labour is explained in AS SSD Benchmark vs CrystalDiskInfo.
ATTO Disk Benchmark — the vendor sweep. Freeware from ATTO Technology (official download via a form), measuring sequential throughput across transfer sizes from 512 B to 64 MB. Pick it to verify peak sequential performance and scaling, the way manufacturers do.
HD Tune Pro — the diagnostic suite. A paid tool after a 15-day trial (version 6.10), combining a basic benchmark with SMART health, error scanning and utilities. Pick it when a drive is suspect and you need a surface scan, not just a score.
Blackmagic Disk Speed Test — the Mac answer. Free from Blackmagic Design, testing disks in video terms: which formats and frame rates a disk sustains. Pick it on macOS, where AS SSD does not exist — see SSD benchmark tools for Mac. Two further names complete the picture: Anvil’s Storage Utilities, an old enthusiast tool with configurable data compressibility and an endurance mode, and UserBenchmark, a whole-PC crowdsourced percentile service — both compared in their own pages in this cluster.
Comparison table
| Dimension | For a total score: AS SSD Benchmark | For general speed: CrystalDiskMark | For health: CrystalDiskInfo |
|---|---|---|---|
| What it measures | Seq, 4K, 4K-64Thrd, access time, Copy and Compression | Sequential and random tests via DiskSpd, configurable queues/threads | Measures nothing — reads SMART health, temperature and wear data |
| Score / result form | MB/s or IOPS plus a weighted Total score | MB/s and IOPS per test; no total score | Health status and SMART attribute values |
| Platform | Windows only; portable | Windows | Windows |
| Licence and price | Freeware; free | Free; MIT licence | Free (from the Crystal Dew World project family) |
| Maintenance status | Final version January 2020 | Active; 9.0.3, May 2026 | Part of the actively maintained CrystalDisk family |
| Best for | Ranking drives by one score; copy/compression behaviour; alignment checks | Everyday speed verification with current settings | Ongoing health watch: temperature, wear, SMART warnings |
A sensible minimal toolkit
Most users need exactly three of these: one benchmark for a comparable score (AS SSD), one current general benchmark (CrystalDiskMark), and one health monitor (CrystalDiskInfo) left running or checked monthly. Add ATTO if you validate hardware, HD Tune Pro if you rescue suspect drives, and Blackmagic if a Mac joins the household. Whatever you install, follow three rules: compare results only within the same tool and settings; record the tool version and test size with every result; and never let a speed score stand in for a health check. If your benchmark says a drive is slow and you decide to replace it, our notes on choosing a new NVMe SSD translate scores into a shortlist.
How to run any of these tools properly
Whichever tools you choose, technique decides whether the results mean anything. Let the system idle before you start, close downloads, game launchers and sync clients, and keep the drive’s free space and temperature in a normal state — a nearly full or overheating SSD will benchmark below its true ability in every tool on this page. Run each test more than once and treat the consistent figure, not the best figure, as the result. Record the essentials with every saved result: tool name and version, test size and settings, drive model and firmware, and how full the drive was. Compare only results gathered the same way, and be suspicious of any conclusion built on a single run of a single tool. Finally, sequence your checks sensibly: health first if a drive is suspect, speed second, and buying decisions last, based on both. Followed consistently, these habits make a handful of free tools more trustworthy than a shelf of paid ones used carelessly — the tools differ, but honest measurement is a method, not a product.
One last selection rule covers the tools not given their own section above. Specialist utilities such as Anvil’s Storage Utilities belong in the kit when a specific feature — in its case configurable data compressibility and an endurance mode — is the thing your test actually needs, and whole-PC services such as UserBenchmark belong at the very start of investigating an unfamiliar machine, before you know which component deserves a dedicated tool. Neither replaces the core three; they extend it at the edges, for configurable experiments and first-glance triage respectively. Judge every addition to your toolkit by that standard: a tool earns its place by answering a question your current tools cannot, not by producing yet another number for a question already answered.
Verdict by scenario
One number to compare drives: AS SSD Benchmark. Quick modern speed test: CrystalDiskMark. “Is my drive dying?”: CrystalDiskInfo first, HD Tune Pro’s scan if suspicion remains. Vendor-style sequential validation: ATTO. Mac: Blackmagic. The best toolkit is the smallest one that covers speed, score and health — and now you know which tool covers which.
Start building yours from the download page.