HCI MemTest
HCI MemTest checks whether a computer can store and retrieve data from memory reliably.
What HCI MemTest is
HCI MemTest checks whether a computer can store and retrieve data from memory reliably. Its maker recommends running it after buying a computer, installing RAM, or changing a system setting such as overclocking. The free Windows download is Version 7.0, listed for Windows 9x, XP, 7, 8, 10, and 11; the product listing also names Linux. The Pro edition adds controls for thread count and RAM allocation per thread, result summaries, command-line automation, disk-based error logs, and a mode for testing while using the computer. Deluxe includes Pro and adds a 64-bit bootable CD or USB version that can access all RAM without loading an operating system. That boot option requires CSM or legacy BIOS support. The maker says 100% coverage should detect errors other than intermittent failures, for which it suggests testing to about 400%. MemTest cannot reliably identify the failing physical chip; testing memory modules individually can help isolate a faulty board. The free download can be unpacked into a folder and removed by deleting that folder.
Good
- Free Windows plan is available.
- Pro supports command-line automated testing.
- Pro records errors to disk.
- Deluxe can access all RAM at boot.
- Free download can be removed by deleting its folder.
Watch out
- Deluxe boot mode requires CSM or legacy BIOS.
- MemTest cannot reliably pinpoint the failing physical chip.
- Pro costs $5, paid once.
- Deluxe costs $14, paid once.
Who it suits
It suits Windows users checking RAM after hardware or system changes, and those who want automated or background testing in Pro. Deluxe may suit users who need boot-time access to RAM and have CSM or legacy BIOS support.
Verdict
HCI MemTest offers a free way to check memory reliability, with Pro adding automation and logging and Deluxe adding bootable testing. Keep in mind the boot mode has a BIOS compatibility requirement, and the software cannot identify a failing chip reliably.
Plans and prices
From HCI MemTest's own pricing page, checked 20 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| MemTest Free | Free | RAM reliability testing · No advertisements |
| MemTest | Free | Windows program · Version 7.0 · 15K ZIP · free/no ads |
| MemTest (free) | Free | Windows; Version 7.0; 15K ZIP download |
| MemTest Pro | $5, paid once | Advanced UI · command-line control · disk error logs · background “nice” mode · home and commercial use · delivered via email |
| MemTest Deluxe | $14, paid once | Includes Pro · bootable CD/USB · 64-bit tester · CSM/legacy BIOS required · tests all RAM · memory-speed benchmark · delivered via email |
The facts
Each one read from HCI MemTest's own pages, with the date it was checked.
What it does
- Allocation behavior
- The FAQ warns that allocating more RAM than Windows can provide without swapping can make coverage progress very slow.checked 15 Oct 2026
- Automation
- Pro offers full command-line control for automated or periodic testing.checked 29 Sep 2026
- Background mode
- Pro includes a “nice” mode intended to test memory while the computer is being used normally.checked 15 Oct 2026
- Background testing
- Pro includes a “nice” mode for testing RAM in the background during normal computer use.checked 29 Sep 2026
- Benchmark feature
- Deluxe reports memory-checking rate as a basic speed benchmark for comparing BIOS settings.checked 15 Oct 2026
- Boot requirement
- The Deluxe bootable tester requires a PC supporting CSM or legacy BIOS boot.checked 15 Oct 2026
- Chip identification limit
- HCI Design says software cannot reliably identify the failing physical memory chip; users must isolate modules by testing them separately.checked 15 Oct 2026
- Command-line automation
- Pro provides full command-line control for automated or scheduled testing.checked 15 Oct 2026
- Compatibility limit
- The Deluxe bootable version requires a PC that supports CSM or legacy BIOS boot.checked 29 Sep 2026
- Continuous error testing
- Pro can continue after errors instead of pausing, allowing correlation with temperature or GPU workload.checked 15 Oct 2026
- Coverage guidance
- The FAQ says 100% coverage should catch non-intermittent errors and recommends about 400% for intermittent failures.checked 15 Oct 2026
- Deluxe boot mode
- Deluxe adds a 64-bit version that runs from bootable CD or USB without loading an operating system and can directly access all RAM.checked 29 Sep 2026
- Diagnostic limit
- The FAQ says software cannot reliably pinpoint the physical memory chip that is failing; it suggests testing modules one at a time to isolate a faulty board.checked 29 Sep 2026
- Documentation
- The maker supplies an online manual, an included manual, and an FAQ page, with technical support by email.checked 15 Oct 2026
- Error logs
- Pro logs errors to disk so users can send an error report to the RAM seller or review what happened after a crash or shutdown.checked 29 Sep 2026
- Error meaning
- The maker treats even one reported memory error as evidence of a RAM or configuration problem.checked 15 Oct 2026
- Independent boot-testing view
- A Tom’s Hardware forum moderator said boot media provides the most complete memory test.checked 15 Oct 2026
- Independent download listing
- Heise lists MemTest 7.0 as a Windows memory-defect detector made by HCI Design.checked 15 Oct 2026
- Installation and removal
- The free download can be unzipped into a folder, does not modify files elsewhere or the registry, and can be removed by deleting its folder contents.checked 29 Sep 2026
- Limit: allocation ceiling
- The HCI-Launcher project documents a maximum allocation of 3548MB for one thread.checked 15 Oct 2026
- Limit: manual parallelism
- Tom’s Hardware says users generally need one instance per processor thread, making large-thread-count testing cumbersome.checked 15 Oct 2026
- Limit: manual setup
- The HCI-Launcher README says users still must manually enter memory amounts and start each launched test instance.checked 15 Oct 2026
- Limit: per-instance memory
- Tom’s Hardware reports that the basic edition can test only about 2GB to 3.5GB per instance, which complicates large-memory or many-thread systems.checked 15 Oct 2026
Where it runs
- Independent OS limitation
- A Tom’s Hardware forum participant argued that an operating-system test cannot access memory regions reserved by Windows and therefore cannot fully test the configuration.checked 15 Oct 2026
Getting started
- Open the HCI MemTest website
- Download the free MemTest ZIP or choose a paid edition
- Unzip the free download into a folder
- Run MemTest from that folder on a supported Windows system
- For Deluxe, prepare a bootable CD or USB and use a PC with CSM or legacy BIOS support
Limits worth knowing
The free edition does not include Pro controls, command-line automation, error logging, background testing, or Deluxe boot media. Deluxe booting is limited to computers supporting CSM or legacy BIOS.
Questions
Is HCI MemTest free?
Yes. The free plan costs 0.00 USD, while MemTest Pro costs 5.00 USD once and MemTest Deluxe costs 14.00 USD once.
Which platforms are supported?
Windows and Linux are listed. The Version 7.0 details cover Windows 9x, XP, 7, 8, 10, and 11.
What does MemTest Pro add?
It adds thread and RAM-per-thread controls, result summaries, command-line control, disk error logs, and background testing.
What is included with Deluxe?
Deluxe includes Windows Pro plus a 64-bit bootable CD or USB version that can access all RAM without loading an operating system.
How much testing coverage is recommended?
The maker says 100% coverage should catch all but intermittent errors and suggests around 400% for intermittent failures.
Can it identify the exact bad memory chip?
No. The FAQ says software cannot reliably pinpoint the physical chip; testing modules one at a time can help isolate a faulty board.
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