Overview

MemTest86 is a bootable RAM diagnostic for builders, repair shops, overclockers, and PC manufacturers investigating memory faults or instability. Its strength is focused, operating-system-independent testing with useful reporting; its boundaries are UEFI hardware requirements and a narrow focus on memory.

Key features

Booting from USB lets MemTest86 test RAM without relying on the installed operating system, which is useful when instability makes normal troubleshooting unreliable. Its 14 listed algorithms include SIMD, Row Hammer, and DMA tests, and supported memory spans DDR2, DDR3, LPDDR4, LPDDR5(x), ECC, CDIMM, and CAMM2. That breadth suits varied PC diagnostic work, but does not make it a general-purpose hardware diagnostic suite.

Customizable HTML reports give technicians a record to share or retain. On supported configurations, error-address decoding can point to a failed DIMM or chip, making a result more actionable than a fault indication alone. The binaries support Secure Boot and are Microsoft-signed to verify code integrity.

Pro adds full test automation and configuration-file custom tests. Site Edition adds scalable LAN deployment through PXE boot, along with PassMark Management Console integration and reporting. Those additions matter for repeatable workflows and larger fleets; they are unnecessary overhead for occasional single-machine checks.

Pricing

The Free Edition costs 0.00 USD per free and has no usage restrictions, but it supports up to 16 CPU cores. Free Edition support is through the public forum. That makes it a reasonable starting point for individual diagnostics, but the core cap may rule it out for higher-core systems.

Pro Download costs 116.00 USD per once, billed $116.00. Pro USB Flash Drive costs 144.00 USD per once, billed $144.00 plus shipping. Both include free upgrades for 12 months, one license per machine running Pro at the same time, support by phone, email, and forum, and a limit of up to 512 CPU cores. The download suits users who will prepare their own boot media; the USB option is for those who want the supplied drive.

Site Edition costs 5557.00 USD per once, billed $5557.00, with free upgrades for 12 months and phone, email, and forum support. It permits unlimited users within one organization in one country. Its PXE deployment and console integration make it the appropriate tier for organizational rollout, not a cheaper substitute for an individual Pro license.

Platforms

Version 11.7 requires UEFI firmware and x86 or ARM64 hardware; Apple Silicon M-series Macs are not supported. MemTest86 runs as a standalone program without an operating system, though Windows, Linux, or an Intel-based Mac can be used to create its bootable USB drive. This separation is practical for diagnosing a machine independently of its installed OS, but the UEFI and processor requirements should be checked before adoption.

Who it's for

Choose MemTest86 when the job is to isolate RAM faults, preserve diagnostic reports, or standardize memory checks across compatible machines. Free Edition fits occasional checks within its 16-core ceiling; Pro suits users needing automation or custom tests; Site Edition is aimed at organizations deploying tests over a LAN. Look elsewhere if the need is broad hardware troubleshooting or support for Apple Silicon Macs.

Pros and cons

Pro: Fourteen algorithms and support for a broad range of memory types make it useful across varied RAM diagnostic jobs.
Pro: HTML reports and supported error-address decoding can help document results and identify a likely failed component.
Pro: Standalone boot and Secure Boot support enable testing outside the installed OS while retaining code-integrity verification.
Con: Free Edition stops at 16 CPU cores, so higher-core systems require Pro or Site.
Con: UEFI and x86 or ARM64 requirements exclude Apple Silicon M-series Macs.
Con: Pro licensing is per machine running it at the same time, while Site's unlimited users are limited to one organization in one country.

Alternatives

For a wider set of hardware diagnostic choices, browse Hardware Diagnostic Software; for overclocking-focused options, see PC Overclocking Software.

Blackwire Drive Eraser & Sanitizer is a Windows freemium tool for drive erasure, so choose it for that task rather than RAM testing.
Hard Disk Sentinel is a Linux and Windows drive-focused option with a trial, so it fits storage diagnostics instead of memory checks.
PC-Doctor Toolbox offers web and Windows support and a personal free tier for up to five systems; consider it when that personal-system scope fits better than standalone RAM testing.
smartmontools is a free, GPLv2 option for Linux, macOS, and Windows centered on its smartctl and smartd utilities, making it the alternative for that utility set.
HDAT2 is freeware for Windows offered as-is without warranty; consider it when those terms suit your needs.
Intel VTune Profiler is a free tool for Linux, self-hosted, and Windows, suitable when that profiler is the tool you need instead.
MemTest64 is a free utility limited to 64-bit Windows, an option when that platform scope is sufficient.
MemTest86+ is a free, GPLv2 standalone memory tester for Linux, macOS, and Windows, making it an option for readers seeking that open-source alternative.

Verdict

MemTest86 is a strong fit for builders, repair teams, and organizations that need focused RAM diagnosis, useful reports, and, at higher tiers, automation or LAN deployment. Its main reason to choose it is the combination of standalone operation, broad memory coverage, and actionable reporting. Look elsewhere if you need general hardware diagnostics, cannot meet its UEFI and processor requirements, or need Apple Silicon support.

	Handheld Companion	MemTest86
Free plan	Yes	Yes
Free trial	No	No
Paid from	Free	Free
Open source	No	No
Platforms	Windows	Linux, macOS, self-hosted, Windows
Free plan	Yes	Yes
CPU tuning	Yes	—
Supported platforms	windows	—
Hardware scope	multi-vendor	—

Handheld Companion vs MemTest86

Handheld Companion

MemTest86