AS SSD Benchmark vs UserBenchmark: Single-Drive Depth vs Whole-PC Percentiles
AS SSD Benchmark and UserBenchmark are both called “benchmarks”, but they answer unrelated questions. AS SSD Benchmark spends all of its time on one drive and reports exactly what that drive did. UserBenchmark runs a short suite across your whole PC — CPU, GPU, storage and memory — and tells you how each component compares with other people’s identical components in its crowdsourced database. This page explains the difference, and states plainly where UserBenchmark stands with the enthusiast community, so you can decide how much weight to give each result. AS SSD itself is available on our download page.
Two different units of analysis
An AS SSD run produces measurements: sequential throughput, 4K and 4K-64Thrd random throughput, access time, copy-test times and a compression graph, summarised in a total score computed from those measurements with a simplified formula. The numbers describe your drive, on your system, today, and another user with the same drive can reproduce the same test and compare directly.
A UserBenchmark run produces a ranking. After testing your components, it compares each one against the distribution of results submitted by other owners of the same model and reports a percentile — your drive performed better than a certain share of submitted results for that model. That is useful for spotting a grossly underperforming component in a new build, but it is a relative statement about a self-selected sample, not a measurement of the drive itself. Percentiles also move as the database changes, even if your hardware never does.
The community-standing question, stated factually
Any honest comparison has to mention how UserBenchmark is treated by the communities that discuss PC hardware most. Links to UserBenchmark have been banned from being cited in several large Reddit communities, including r/hardware and r/Intel, following long-running disputes about how its aggregate scores weight different components and workloads. That is a documented community decision, and it is the reason you will often see a UserBenchmark result challenged or removed in enthusiast forums while an AS SSD or CrystalDiskMark screenshot is accepted without comment.
We state that as context, not as a verdict on every number the site produces. A percentile for your exact drive model can still be a quick sanity check. The practical lesson is narrower: if you need a storage result that other people will accept, reproduce and compare — for a support thread, a review, a warranty discussion or a buying decision — a direct measurement from a dedicated tool travels better than a crowdsourced percentile. And an aggregate whole-PC score should never be used to conclude that one specific SSD is faster than another, because the aggregate blends in weightings that have nothing to do with your drive.
Depth on one drive
For storage questions, depth beats breadth. AS SSD’s separation of sequential, 4K and 64-thread results tells you how a drive is fast or slow: strong sequential with weak 4K suggests a drive fine for file storage but sluggish as a system disk; a collapse in 4K write with normal reads suggests a full or heavily fragmented working set, a caching problem or a drive near its limits. The Copy-Benchmark’s ISO, Program and Game scenarios and the Compression-Benchmark add workload shapes that a single quick suite cannot represent. AS SSD also displays controller mode and partition alignment in its main window — two configuration faults that a percentile might hint at (“your drive is in the bottom range for its model”) without ever identifying.
Side-by-side comparison
| Dimension | AS SSD Benchmark | UserBenchmark |
|---|---|---|
| What it measures | One drive in depth: Seq, 4K, 4K-64Thrd, access time, Copy and Compression tests | Whole PC briefly: CPU, GPU, SSD/HDD and RAM in one suite |
| Score / result form | Measured MB/s and IOPS per test plus a weighted Total score for the drive | Percentile ranking of each component against crowdsourced results for the same model |
| Platform | Windows only; portable, runs locally | Windows test program whose results depend on its online database |
| Licence and price | Freeware by Alexej Schepeljanski; free | Free to run; results live on the UserBenchmark service |
| Maintenance status | Final version 2.0.7316.34247, January 2020; results remain comparable across years | Ongoing online service; database and percentiles change over time |
| Best for | Answering storage questions precisely and producing results others can reproduce | A first-glance check that no component in a new build is drastically underperforming its peers |
Which result should you quote?
Quote the tool that matches the question. “Is my PC broadly healthy?” is a whole-system question where a percentile sweep is a reasonable starting point. “Is this SSD performing as it should?”, “Did the new firmware help?”, “Why does Windows feel slow on this drive?” — those are storage questions, and they deserve storage measurements. For the head-to-head most readers actually need, see AS SSD Benchmark vs CrystalDiskMark, and for the full toolkit, the best SSD benchmark tools overview.
What a percentile can and cannot tell you about storage
A percentile for your drive model says your unit performed better than a stated share of submitted units. That can expose a genuinely faulty sample or a badly configured machine. What it cannot do is separate the drive from the system around it: the submitted results for any model mix together different motherboards, ports, drivers, firmware versions, fill levels and thermal conditions, so a mid-pack percentile may describe your setup rather than your SSD. It also cannot be archived meaningfully — the same unchanged PC can drift in percentile as new submissions arrive. A stored AS SSD screenshot, by contrast, freezes the actual measurements: when your drive slows down six months later, you can rerun the identical test and compare megabytes per second, not just a moving rank. For storage, where the interesting questions are “how fast, at what, and has it changed?”, measured values age far better than rankings, which is the deeper reason dedicated benchmarks remain the reference in storage discussions.
Verdict by scenario
New build, quick overall sanity check: a whole-PC sweep is convenient — then follow up any flagged component with a dedicated tool. Any conclusion about an SSD itself: AS SSD Benchmark (or CrystalDiskMark), measured directly. Posting results for a community to judge: use a dedicated benchmark, keeping in mind that several major communities do not accept UserBenchmark citations. Depth on the component you care about beats a blended ranking, every time the question is specific.
Run the dedicated test yourself: the official AS SSD file is on our download page.