# CrystalDiskMark

Application: Crystal Dew World

Also called crystal disk mark, cdm, diskmark64

Crystal Dew World, System

A disk speed bench from Crystal Dew World. The 64-bit process is DiskMark64.exe. It is not CrystalDiskInfo. Sequential numbers are not game FPS.

## What you need to know

CrystalDiskMark benches speed. CrystalDiskInfo reads SMART.

Crystal Dew World's CrystalDiskMark measures disk throughput. Sequential MB/s are not game FPS. Get it from crystalmark.info. DiskInfo64.exe is the health app, not this bench.

- **What is it?**: A disk speed bench

  **Same as CrystalDiskInfo?**: No. Info is SMART health

  **Are sequential numbers FPS?**: No. They are disk MB/s

Feex says

If someone sent a CrystalDiskMark screenshot, I would read the profile and the drive letter before I called the SSD fake. I would not use those numbers as a SMART health check.

## What is CrystalDiskMark?

CrystalDiskMark fills a test file and times reads and writes. DiskMark64.exe is the bench. DiskInfo64.exe is the health sibling.

## If you have never used it

If you want to measure disk speed, CrystalDiskMark is hiyohiyo's bench. Download it from crystalmark.info. Sequential and random rows are megabytes per second, not game FPS. It is not CrystalDiskInfo, which reads SMART health.

## What is it used for?

**Measure sequential and random disk speed**

The default profiles are disk benches. They are not a 3DMark FPS number and not a SMART health tile.

**Compare a new SSD to the old HDD**

Run the same profile on both. CrystalDiskInfo will not give you these MB/s rows.

**Pick a profile before you quote a number**

Default, Peak, Real World, and Mix change the test. Quoting SEQ1M without the profile is how forum fights start.

## Who is it for?

- People who just installed an SSD and want a number
- Anyone who opened DiskMark when they meant DiskInfo
- Review readers who need to match a profile

## Current status

CrystalDiskMark (2007) is a current disk benchmark from Crystal Dew World. The vendor still points Windows users at https://crystalmark.info/en/software/crystaldiskmark/.

## How old is it?

CrystalDiskMark started in 2007. CrystalDiskInfo followed in 2008. Both remain Crystal Dew World apps. A screenshot of an old 50 MB/s HDD bench is history, not a broken NVMe.

## Versions

Major channels first. Exact build numbers are not all verified here.

Standard

Shizuku edition

Portable

## System requirements

Values follow the publisher's public guidance. Workload still changes the real need.

### Minimum

| Operating system | Windows 10 or Windows 11, per Crystal Dew World's current DiskMark page |
| ---------------- | ----------------------------------------------------------------------- |
| RAM              | Enough for Windows plus this app. Heavy projects want more.             |

## Resource profile

- **CPU demand**: Moderate during a run

  **Disk demand**: High. It writes and reads a large test file

## Installed processes

These executables belong to this product when it is installed.

| DiskMark64.exe | Speed bench window |
| -------------- | ------------------ |

## Startup components

CrystalDiskMark should not start with Windows. Close it when the run finishes so the test file can shrink.

## File locations

| Typical install | C:\Program Files\CrystalDiskMark\\ |
| --------------- | ---------------------------------- |

## File formats

Creates a temporary test file on the target volume

## Common problems

### Bench run on a dying drive

A low score can be health or a full disk. Check CrystalDiskInfo if SMART is the question. This exe does not replace it.

### Antivirus or a full volume tanks the write test

The bench writes a real test file. Pause a real-time scan as a test, and leave free space.

## Getting unstuck

### Confirm you opened DiskMark64, not DiskInfo64

The health window has Good/Caution tiles. The bench has All and SEQ buttons. They are two Crystal Dew apps.

### Pick the same profile as the review you are copying

Default versus Peak changes the number. That is CrystalDiskMark, not a GPU driver.

### Do not treat SEQ1M as game smoothness

Games care about more than one sequential row. CrystalDiskInfo still will not give FPS either.

## Alternatives

Manufacturer benches and FIO overlap. CrystalDiskInfo is the health sibling, not a substitute score.

## Official help and downloads

Start with the vendor. Random exe sites are not a support channel.

| Download      | [crystalmark.info/en/software/crystaldiskmark/ ](https://crystalmark.info/en/software/crystaldiskmark/)Official installer or vendor page |
| ------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
| Help          | [crystalmark.info/en/software/crystaldiskmark/ ](https://crystalmark.info/en/software/crystaldiskmark/)Vendor support                    |
| Official site | [crystalmark.info/en/software/crystaldiskmark/ ](https://crystalmark.info/en/software/crystaldiskmark/)Start here, not a random exe host |

## Related hardware

The bench stresses the drive you pick. A USB enclosure can be the bottleneck. This is not a GPU test.

## Technical details

Technical details

Vendor version numbers change. This article does not pin a build.

## Related

These entities connect to this article. Type is shown on every link.

[CrystalDiskInfo: Application](https://feex.it/wiki/software/crystaldiskinfo)[How to read Task Manager: Guide](https://feex.it/wiki/software/system/how-to-read-task-manager)

## Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. [How we research](https://feex.it/wiki/research).

- [CrystalDiskMark official site ](https://crystalmark.info/en/software/crystaldiskmark/)· Vendor product page
- [CrystalDiskMark help ](https://crystalmark.info/en/software/crystaldiskmark/)· Vendor support
- [Crystal Dew World ](https://crystalmark.info/en/)· Vendor home for DiskMark and DiskInfo
- [Foxhole process map ](https://foxhole.feex.it/)· First-party samples on Windows PCs. Not a lab benchmark.

## Was this article useful?

A yes or no is enough. Pick a reason if you want, or add a short note.

Quick facts

The short identity of this page. Specs, sources, and the full story stay in the article.

- **Developer**: Crystal Dew World

  **Category**: Disk benchmark

  **Process**: DiskMark64.exe

  **License**: Freeware

  **First released**: 2007

  **Official site**: [crystalmark.info/crystaldiskmark](https://crystalmark.info/en/software/crystaldiskmark/)

  **Mapped by Feex**: Seen on Windows PCs in Foxhole

Feex Reviewed: Last verified August 2026

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Source: [Canonical Feex Wiki page](https://feex.it/wiki/software/crystaldiskmark/)

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