If you’ve lately upgraded your processor, or are overclocking it, it may be a good suggestion to know one of the best instruments to emphasize check your CPU to verify how steady it’s. There are various CPU stress checks on the market, however we have now just a few favorites you need to try.

The aim of stress testing is to push the pc to failure. You need to see how lengthy it takes earlier than it turns into unstable. It’s normally a good suggestion to run checks for at the very least an hour or two, although some can take longer.

Before beginning these checks, we’d extremely advocate instruments like HWMonitor, HWiNFO64, or Core Temp for retaining observe of CPU temperature, clock speeds, and energy. These could be a precious useful resource for ensuring your cooling answer is doing its job as these stress checks push your CPU fairly actually to the restrict. It’s so essential that we have now a complete information on how one can verify your CPU’s temperature.

Here’s the listing of 4 favourite CPU stress checks.


Prime95 is likely one of the most well-known free CPU stress checks on the market. It was developed as a part of the Great Internet Mersenne Prime Search (GIMPS), through which the processor is used to search out massive prime numbers. Though Prime95 is just not initially made to emphasize check the CPU, the pressure in utilizing the processor’s floating level and integer capabilities make it a superb technique to see what your CPU is able to.

You can run completely different “torture tests” relying on what you’re making an attempt to emphasize. The small quick fourier transforms (FFTs) could be a good technique to see if there are any points. The massive FFTs actually punish your CPU, whereas the blended checks push RAM utilization. A phrase of warning with Prime95: It has a considerably adverse popularity of placing pointless stress on the CPU.

Download Now at Prime95


AIDA64 CPU stress test.

Unlike the opposite instruments on our listing, AIDA64 is just not free to make use of. The most cost-effective model is AIDA64 Extreme, which is able to run you about $50 for 3 PCs whereas the Business and Engineer variations go for $200. This instrument is geared extra towards engineers, IT professionals, and lovers (as indicated by the varied obtain choices). Instead of purely stressing the CPU like Prime95, it simulates a extra real looking workload {that a} CPU is more likely to have. This is superb for gauging workstations or servers which might be meant for sustained, high-performance workloads.

AIDA64 is an all-in-one diagnostic instrument that can be utilized to take a look at particulars of your specific system. In the System Stability Test, you may select which part (CPU, reminiscence, native disks, GPU, and many others.) you need to stress. While the check is operating, there’s a Sensor tab that permits you to view the temperature of every CPU core and fan speeds. This could be invaluable to see in case your system is being correctly cooled and harassed.

Download Now at AIDA64

Cinebench R23

Cinebench stress test.

Cinebench is one other well-known free benchmark utility that you could have seen in numerous opinions. It was created by Maxon, the developer behind 3D modeling software Cinema 4D. Cinebench simulates frequent duties inside Cinema 4D to measure system efficiency. Specifically, the first check renders a photorealistic 3D scene and makes use of algorithms to emphasize all CPU cores. The render is about 2,000 objects comprised of over 300,000 polygons.

The most up-to-date model, R23, is ready to run a 10-minute thermal throttling check as an alternative of doing only one single run. This could be helpful in seeing how a lot you may push a specific system earlier than it will get too scorching. The single run continues to be obtainable within the superior choices. The latest model additionally provides assist for Apple’s M1 silicon.

Download now at Maxon


CPU-Z stress and monitoring tool.

This is nice all-around stress check software program that’s simple to make use of and free. Like AIDA64, CPU-Z may collect detailed info in your system, together with CPU processor title, cache ranges, and even what course of node it was manufactured on. You may get real-time measurements of every core’s frequency. The major drawbacks are that it doesn’t stress GPUs, although it may well stress RAM. It’s focus is CPU stress testing and it’s a really great tool in that respect.

Download Now at CPUID


HeavyLoad CPU stress test.

HeavyLoad is a stress instrument developed by JAM Software that encompasses a useful graphical person interface (GUI) to visualise the checks being run. The software program means that you can check your entire processor or only a particular variety of cores. One helpful characteristic of HeavyLoad is that you would be able to set up the instrument on a USB drive and apply it to a number of computer systems. This avoids having to put in HeavyLoad on each single pc. It’s seful for IT professionals who want to make sure quite a few servers are capable of deal with heavy processor hundreds. HeavyLoad can also be capable of stress different parts akin to GPU, RAM, or storage.

Download Now at Jam Software

IntelBurn Test

IntelBurn CPU stress test.

Despite it’s title, the IntelBurn Test isn’t made by Intel. However, it makes use of Intel’s Linpack benchmark to measure the period of time it takes to resolve a system of linear equations after which converts that right into a efficiency charge. This is mostly the identical engine that Intel makes use of to emphasize its personal CPUs earlier than transport them out. The interface is fairly easy and straightforward to make use of. You can set the extent at which the CPU is harassed, what number of occasions to run the check, and what number of threads to run.

While this might really be extra correct than Prime95, it additionally has the identical popularity for pushing a CPU well past its regular limits, maybe much more than Prime95. Keep tabs on the warmth output whereas operating checks. Also, whilst you can technically use it with AMD CPUs, it could be higher to make use of different benchmark instruments as an alternative.

Download Now at Jam Software


OCCT stress test software.

You can’t discuss CPU stress testing with out together with the OverClock Checking Tool (OCCT). It could also be the most well-liked stability-checking instrument on the market. This is an all-in-one instrument that features 4 checks for gauging efficiency: Two for CPU, one for GPU, and one for the ability provide. It additionally embeds the HWiNFO monitoring engine that we talked about earlier, and it features a temperature fail-safe that instantly stops the check ought to a sure part attain an unsafe temperature.

There is a free model of OCCT, however you’re restricted to a one-hour check. The Personal version removes that limitation and likewise contains the power to save lots of a full graphical report of the check. The Pro version provides the power to run on domain-joined computer systems and generate CSV information to construct personalized graphs. Finally, the Enterprise version means that you can construct your individual check suite utilizing a drag-and-drop system for simpler configuration. Even higher, those that want a command line will be capable to use that within the Enterprise model as nicely.

Download Now at OCBase

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