The best MemTest64 alternatives
The rest of Best Hardware Diagnostic Software, in this site's order: each with what it costs, where it runs and its record score.
MemTest86 may suit system builders, PC repair stores, overclockers, and PC manufacturers diagnosing memory faults.
Speccy suits Windows home users who want an overview of PC hardware, component temperatures, and disk diagnostic data.
stress-ng may suit users who need to exercise hardware and operating system interfaces under load or observe throughput changes.
GSmartControl suits users who want a graphical way to inspect SMART data or run tests on supported drives.
MemTest86+ suits people troubleshooting suspected memory problems on supported computer architectures.
It suits people who want to contribute computer time to GIMPS or run sustained CPU workloads for processor and cache stability checks.
smartmontools suits users who want command-line tools and background monitoring for SMART-compatible storage devices.
It suits developers and performance engineers investigating CPU, GPU, NPU, memory, or code-path bottlenecks.
It suits Windows PC users who want hardware tests, health monitoring, and system history, including remote visibility into equipped PCs.
Piston suits Android users who want basic OBD2 diagnostics with a compatible ELM327 adapter.
HDAT2 suits users who can boot a DOS system to diagnose supported storage devices.
UBCD suits people who need bootable diagnostics for Windows or Linux systems, including memory, disk, GPU, or stress checks.
3DP Chip suits Windows users who need component details, driver downloads, or driver backup and rollback.
HDDScan suits Windows users who need drive diagnostics, SMART inspection, surface tests, temperature monitoring, or command-line operation.