Head-to-head · PC Stress Testing Tools
HeavyLoad vs CPUID powerMAX
HeavyLoad leads on 1 check, CPUID powerMAX on 0, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreHeavyLoad · 8.4/10
- Free planboth
- Most featuresHeavyLoad · 4 of 5
HeavyLoad scores higher on our rubric for pc stress testing tools: 8.4 against 8.3 out of 10; our editors rank them #4 and #5.
HeavyLoad offers memory stress testing; CPUID powerMAX doesn't.
HeavyLoad is the better fit for free Windows tests across CPU, GPU, RAM, and disks. CPUID powerMAX is the better fit for free CPU and GPU burn-in on Windows.
- HeavyLoad fits best
Free Windows tests across CPU, GPU, RAM, and disks
- CPUID powerMAX fits best
Free CPU and GPU burn-in on Windows
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Side by side
| Feature | HeavyLoad 8.4/10 Visit ↗ | CPUID powerMAX 8.3/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 8.4 | 8.3 |
| Ranking | #4 in PC Stress Testing Tools | #5 in PC Stress Testing Tools |
| Best for | Free Windows tests across CPU, GPU, RAM, and disks | Free CPU and GPU burn-in on Windows |
| Pricing model | Free | Free |
| Starting price | Free plan | Free plan |
| Free plan | ✓ | ✓ |
| Free trial | — | — |
| Deployment | Desktop | Desktop |
| Platforms | Windows | Windows |
| Built for | Solo, Small business, Mid-market, Enterprise | Solo, Small business |
| Features HeavyLoad 4/5 · CPUID powerMAX 3/5 | ||
| CPU stress testing | ✓ | ✓ |
| GPU stress testing | ✓ | ✓ |
| Memory stress testing | ✓ (best) | — |
| Combined system workload | ✓ | ✓ |
| Error detection | Not checked yet | Not checked yet |
| Specs | ||
| Platform support | Windows | Windows |
| Our review | ||
| Pros |
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| Cons |
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| Our verdict | HeavyLoad is a free Windows utility from JAM Software GmbH for checking how PCs and server systems behave under resource-intensive conditions. It suits people who need to apply load to individual components or combine several workloads to… Read the review → |
CPUID powerMAX is a free Windows utility for putting a PC’s CPU and GPU under heavy load. It suits people who want to check component stability and cooling, or raise total system power consumption to assess whether a power supply can… Read the review → |
Strengths and trade-offs
HeavyLoad — where it wins
- Tests CPU, GPU, memory, and disk activity individually or together
- Runs continuously or for a specified duration, with command-line controls
- Offers an installer and portable version for USB use
Where it doesn't
- Windows-only, with no support for other listed platforms
- Provides stress workloads, not the deeper reporting and error detection some buyers need
- Documentation is the only listed support channel
CPUID powerMAX — where it wins
- Runs CPU tests across all CPUs recognized by Windows
- Offers separate CPU and GPU tests plus a combined workload
- Portable; requires no installation or administrator rights
Where it doesn't
- Does not test memory
- Does not report stability errors or provide a stability score
- CPUID warns that use under some conditions can damage components
- HeavyLoad8.4/10 · Free plan
A free Windows utility for combined or targeted PC stress tests.
Visit JAM SoftwareFull verdict → - CPUID powerMAX8.3/10 · Free plan
A free, portable Windows utility for separate or combined CPU and GPU burn-in.
Visit CPUIDFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update