CPU Stress Test

Choose a specific CPU core. The program drives that core to maximum frequency and load and keeps it there until you stop. Useful for thermal testing, stability proofs, cooler benchmarking, and any test that needs a sustained, predictable CPU load.

What it does

You pick which core (or cores) to overload. The program spawns a tight loop pinned to each selected core and keeps it busy. Windows shows that core at 100% in Task Manager. Temperature climbs. You watch HWiNFO or your motherboard sensors to see how high the chip will go before throttling kicks in.

What it's good for

• Thermal testing — how hot does each core get under sustained load?
• Stability testing for overclocked systems
• Cooler benchmarking — air vs liquid, before vs after repaste
• Confirming your power supply can handle peak draw
• Triggering thermal-throttle behaviour for testing or repair diagnosis
• Educational demos of multi-core scheduling

Features

• Per-core selection — overload one core or all of them
• Instant stop — release the load and watch temps drop
• Portable single executable
• No installer, no registry edits, no leftover services

System requirements

• Windows 7, 8, 10, 11
• Multi-core CPU (single-core works too — with less choice)
• About 2 MB of disk space