CrystalDiskMark

ApplicationCrystal Dew World

Also called crystal disk mark, cdm, diskmark64

Crystal Dew WorldSystem

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

Minimum system requirements
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.

Installed processes
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

Common CrystalDiskMark 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.

Official contacts
Download	crystalmark.info/en/software/crystaldiskmark/ Official installer or vendor page
Help	crystalmark.info/en/software/crystaldiskmark/ Vendor support
Official site	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

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

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

CrystalDiskMark official site · Vendor product page
CrystalDiskMark help · Vendor support
Crystal Dew World · Vendor home for DiskMark and DiskInfo
Foxhole process map · 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.