MemTest86 is a standalone RAM diagnostic program that boots from USB and checks memory for faults without an installed operating system.
Alternatives to HeavyLoad
HCI MemTest checks whether a computer can store and retrieve data from memory reliably.
Novabench is a benchmark and network test suite for evaluating, comparing, and understanding computer performance.
- 4
AIDA64
AndroidiOSWindows7.0€59.95 one-time - 5

OCCT
OCCT is a PC tool for checking stability, applying stress tests, benchmarking, and monitoring system details.
Free planLinuxWindows6.7Free plan - 6
y-cruncher
y-cruncher computes Pi and other mathematical constants to trillions of digits, and also serves as a multi-threaded benchmark and stress-testing…
Free planLinuxWindows6.6Free plan - 7
3DMark
3DMark is benchmark software for measuring graphics, processor, ray-tracing, API, and stability performance across PC, Mac, notebook, tablet, and smartphone systems.
AndroidiOSmacOSWindows6.5 - 8
fio
fio is a free, GPL-2.0-licensed tool for simulating storage I/O workloads to measure performance or reproduce bugs.
Free planLinuxmacOSSelf-hostedWindows6.5Free plan - 9
Intel VTune Profiler
Intel VTune Profiler analyzes application and system performance to help developers locate bottlenecks across AI, HPC, cloud, IoT, media, and storage workloads.
Free planLinuxSelf-hostedWindows6.5Free plan - 10
stress-ng
stress-ng is a free tool for exercising computer hardware and operating system interfaces under load.
Free planAndroidLinuxmacOSSelf-hosted6.4Free plan - 11

Autoruns
Autoruns is a free Windows utility for examining programs and drivers set to run during startup, login, or when certain built-in Windows applications open.
Free planWindows6.3Free plan - 12
Prime95
Prime95 is free software for searching for Mersenne primes and contributing computing work to GIMPS, an international public project.
Free planLinuxmacOSSelf-hostedWindows6.3Free plan - 13

UNIGINE Heaven Benchmark
UNIGINE Heaven Benchmark is a graphics benchmark for assessing GPU performance, stability under stress, and cooling-system load.
LinuxmacOSWindows6.1 - 14

UNIGINE Superposition Benchmark
LinuxWindows6.0 - 155.9Free plan
- 16
BurnInTest
LinuxWindows5.7From $58 a year - 17
Karhu RAM Test
Karhu RAM Test is a paid Windows memory stress-testing tool designed to detect faulty hardware and instability from overclocking.
Windows5.5 - 18
stress-ng
AndroidLinuxmacOS4.9 - 19
ThermalStats
WebLinuxWindows4.8 - 20
GPU Magick
LinuxmacOSWindows4.7 - 21
clgpustress
LinuxWindows4.6 - 224.6
- 23
gpu-burn
LinuxWindows4.6 - 24
Linpack Xtreme
LinuxWindows4.6 - 25
NVIDIA GPU Stress Test
LinuxWindows4.6 - 26
ClawHammer
Windows4.5 - 27
CoreCycler
Windows4.5 - 28
CoreRipperX
Windows4.5 - 29
CPUID powerMAX
Windows4.5 - 304.5
