Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsA high CPU temperature is not automatically a fault: the right limit depends on the exact processor, workload, cooling system, firmware, and room temperature. Check your CPU’s specified thermal limit, then look at sustained temperature, CPU power and utilization, and whether the processor is actually throttling. If temperature rises sharply, the system repeatedly shuts down, or a fan or pump has stopped, stop demanding workloads and check the cooling system before continuing.
First, determine whether the temperature is a problem
There is no universal safe CPU temperature or reliable rule that every reading above 80°C—or 90°C—means a cooler is failing. Intel says maximum junction temperature varies by processor and is commonly around 100–110°C; that range is general guidance, not a limit for every Intel CPU. Find the specification for your exact model. AMD likewise notes that temperature depends on the cooler, airflow, ambient temperature, settings, and workload. Intel’s temperature guidance and AMD’s temperature guidance explain why context matters.
Modern CPUs can raise clock speed and power under load, then reduce performance as needed to protect themselves. A brief peak while an application opens is less informative than a high temperature sustained during a repeatable workload. A CPU can also be limited by power or current rather than temperature, so a temperature reading alone does not explain poor performance.
- Idle or light use: Treat temperature as a trend, not a pass/fail test. Background tasks, fan-stop settings, room temperature, and short boost bursts can cause variation.
- Gaming: Results depend on the game, frame rate, CPU load, GPU heat inside the case, and power settings.
- Rendering, compiling, encoding, or stress testing: Sustained all-core work can produce substantially more heat than ordinary use.
Record enough information to compare results
Use a reputable hardware-monitoring application or the system’s firmware diagnostics. Record your CPU model, whether it is a desktop or laptop, operating system, room temperature, cooler type, and any recent changes such as a new cooler, BIOS update, overclock, cleaning, or software installation. Then note idle and workload temperatures, peak and sustained readings, CPU utilization, package power if available, clock speed, and any thermal, power, or current-throttling indicators.
Free tools Windows power users keep installed
One-click scans. No signup required.
#1 Best Overall
- [Brand Overview] Thermalright is a Taiwan brand with more than 20 years of development. It has a certain popularity in the domestic and foreign markets and has a pivotal influence in the player market. We have been focusing on the research and development of computer accessories. R & D product lines include: CPU air-cooled radiator, case fan, thermal silicone pad, thermal silicone grease, CPU fan controller, anti falling off mounting bracket, support mounting bracket and other commodities
- [Product specification] Thermalright PA120 SE; CPU Cooler dimensions: 125(L)x135(W)x155(H)mm (4.92x5.31x6.1 inch); heat sink material: aluminum, CPU cooler is equipped with metal fasteners of Intel & AMD platform to achieve better installation, double tower cooling is stronger（(Note:Please check your case and motherboard for compatibility with this size cooler.）
- 【2 PWM Fans】TL-C12C; Standard size PWM fan:120x120x25mm (4.72x4.72x0.98 inches); fan speed (RPM):1550rpm±10%; power port: 4pin; Voltage:12V; Air flow:66.17CFM(MAX); Noise Level≤25.6dB(A), leave room for memory-chip(RAM), so that installation of ice cooler cpu is unrestricted
- 【AGHP technique】6×6mm heat pipes apply AGHP technique, Solve the Inverse gravity effect caused by vertical / horizontal orientation, 6 pure copper sintered heat pipes & PWM fan & Pure copper base&Full electroplating reflow welding process, When CPU cooler works, match with pwm fans, aim to extreme CPU cooling performance
- 【Compatibility】The CPU cooler Socket supports: Intel:115X/1200/1700/17XX AMD:AM4;AM5; For different CPU socket platforms, corresponding mounting plate or fastener parts are provided（Note: Toinstall the AMD platform, you need to use the original motherboard's built-in backplanefor installation, which is not included with this product)
Sensor labels such as “CPU package,” “core,” “Tctl/Tdie,” and “motherboard CPU” may describe different sensors or reporting methods. Do not compare unlike readings as if they were identical, and do not rely on a single screenshot.
Run a repeatable, relevant check
- Close unnecessary applications and record the temperature after several minutes without demanding work.
- Run the application or workload that usually causes the problem.
- Observe temperature, utilization, power, clock speed, and throttling during the same workload.
- Stop if the system becomes unstable, smells unusual, shows a cooling failure, or repeatedly shuts down.
- After each change, repeat the same check so you can tell whether it helped.
Start with your real workload rather than an extreme stress test. The manufacturer’s exact thermal limit and the system’s behavior are more useful than a generic temperature chart. Intel notes that the maximum observable temperature can be system-design-specific and that normal operation can bring some processors close to their maximum.
Take immediate safety steps when cooling may have failed
Save your work and stop a demanding workload if temperatures rise rapidly, performance collapses, or the system becomes unstable. Shut down if a fan or pump is clearly not operating, there is a burning smell, or the computer repeatedly performs emergency shutdowns. Do not disable thermal protections to keep a workload running; those safeguards are intended to reduce risk, but they do not make a failed cooling system safe to ignore.
Check for software causing high CPU use
A hot processor may simply be busy. Video rendering, game shader compilation, software builds, virtual machines, browser activity, sync and indexing, antivirus scans, and operating-system updates can all raise CPU load. A runaway application, unwanted software, or an uncapped game frame rate may keep it high longer than expected.
Rank #2
- CONTACT FRAME FOR INTEL LGA1851 | LGA1700: Optimized contact pressure distribution for longer CPU life and better heat dissipation
- ARCTIC's P12 PRO FAN: More power at any speed - more powerful and quieter than the P12, especially at low speeds. Higher maximum speed for optimal cooling performance under high load
- NATIVE OFFSET MOUNTING FOR INTEL AND AMD: Shifting the cold plate center towards the CPU hotspot ensures more efficient heat transfer
- INTEGRATED VRM FAN: PWM-controlled fan that lowers the temperature of the voltage converters and thus ensures reliable performance
- INTEGRATED CABLE MANAGEMENT: The PWM cables of the radiator fans are integrated in the sheathing of the hoses so that only a single visible cable is connected to the motherboard
- Open the operating system’s process monitor and sort processes by CPU usage.
- Check whether the busiest process matches something you expect, such as a render or update.
- Pause or close the application if appropriate. If the process is unexpected, investigate it before removing or ending it.
- Update, repair, reinstall, or uninstall a problematic application; run a trusted malware scan if the load remains unexplained.
- Retest under the same workload and compare the results.
Do not terminate a critical system process solely because its name looks unfamiliar. A process name by itself does not establish whether it is safe or malicious.
- High CPU use and high temperature: The processor may be heating normally while doing sustained work.
- Low CPU use and high temperature: Check for a hidden background task, faulty reading, elevated firmware settings, blocked airflow, poor cooler contact, or a failed fan or pump.
- High temperature in one application: Check that application’s workload, frame rate, and power profile.
- High temperature immediately after startup: Prioritize fan and pump operation, cooler contact, mounting, and firmware settings.
Fix high temperatures on a desktop PC
Check every fan and pump
Confirm that the CPU fan starts as the processor warms up, radiator fans are running, and case intake and exhaust fans operate. Make sure no cable touches a blade and nothing blocks the fan or pump. If you have an AIO liquid cooler, verify the pump’s power and connection to the correct motherboard header or controller. BIOS hardware monitoring may show fan or pump RPM; a zero reading is a clue to investigate, though reporting varies by setup.
Intel’s overheating troubleshooting guidance includes checks for fan connections, blocked impellers, fan operation, and pump failure or fluid loss in liquid-cooling systems. Follow the cooler maker’s instructions for interpreting connections and readings.
Clear dust and airflow obstructions
Inspect CPU heatsink fins, radiator fins, fan blades, case filters, and intake and exhaust vents. Clean accumulated dust carefully; if using compressed air, hold fan blades still rather than forcing them to spin. Do not open or puncture a sealed AIO cooler. Also check that cables are not blocking the path between intake and exhaust.
Rank #3
- [Brand Overview] Thermalright is a Taiwan brand with more than 20 years of development. It has a certain popularity in the domestic and foreign markets and has a pivotal influence in the player market. We have been focusing on the research and development of computer accessories. R & D product lines include: CPU air-cooled radiator, case fan, thermal silicone pad, thermal silicone grease, CPU fan controller, anti falling off mounting bracket, support mounting bracket and other commodities
- [Product specification]AX120R SE; CPU Cooler dimensions: 125(L)x71(W)x148(H)mm (4.92x2.8x 5.83 inch); Product weight:0.645kg(1.42lb); heat sink material: aluminum, CPU cooler is equipped with metal fasteners of Intel & AMD platform to achieve better installation
- 【PWM Fans】TL-C12C; Standard size PWM fan:120x120x25mm (4.72x4.72x0.98 inches); fan speed (RPM):1550rpm±10%; power port: 4pin; Voltage:12V; Air flow:66.17CFM(MAX); Noise Level≤25.6dB(A), the fan pairs efficient cool with low-noise-level, providing you an environment with both efficient cool and true quietness
- 【AGHP technique】4×6mm heat pipes apply AGHP technique, Solve the Inverse gravity effect caused by vertical / horizontal orientation. Up to 20000 hours of industrial service life, S-FDB bearings ensure long service life of air-cooler radiators. UL class a safety insulation low-grade, industrial strength PBT + PC material to create high-quality products for you. The height is 148mm, Suitable for medium-sized computer case
- 【Compatibility】The CPU cooler Socket supports: Intel:1150/1151/1155/1156/1200/1700/17XX/1851,AMD:AM4 /AM5; For different CPU socket platforms, corresponding mounting plate or fastener parts are provided
Check fan direction and case airflow
Front, bottom, or side fans commonly draw air in, while rear and top fans commonly exhaust it, but case design determines the right arrangement. Check each fan’s airflow direction instead of assuming every fan helps. Intake and exhaust should work together rather than recirculating hot air. A front-mounted radiator may send CPU heat into the case if configured as intake; a top-mounted radiator can exhaust that heat directly but must fit the case without clearance conflicts. Intel recommends checking airflow direction, cable obstructions, and balance between intake and exhaust.
Inspect a new or recently changed cooler installation
If the temperature problem began after a build, cooler replacement, or service, check the installation before buying parts. Intel’s troubleshooting guidance calls out these potential errors:
- Protective film remains on the cooler’s cold plate.
- The mounting bracket, backplate, or standoffs are missing, incorrect, or positioned improperly.
- The cooler is loose, mounted unevenly, or not making proper contact with the CPU.
- The cooler is incompatible with the CPU socket or its heat output.
- The CPU fan, pump, or radiator fans are disconnected or connected incorrectly.
Switch the computer off before inspecting or reseating a cooler. Check the cooler and motherboard instructions for the right hardware and mounting sequence.
Reapply thermal paste only when there is a reason
Repasting is appropriate when removing and reinstalling a cooler, when inspection reveals dried, cracked, contaminated, or uneven compound, or when a disturbed or deteriorated interface is a plausible cause after simpler checks. There is no established universal replacement interval. Repasting will not repair a stopped fan, failed pump, blocked heatsink, incompatible bracket, or excessive CPU power.
Recommended Free Tools
Rank #4
- Cool for R7 | i7: Four heat pipes and a copper base ensure optimal cooling performance for AMD R7 and Intel i7.
- Quiet Cooling Fan: SickleFlow 120 Edge with Dynamic PWM control (690–2,500 RPM), designed for low noise and peak cooling performance.
- Simplify Brackets: Redesigned brackets simplify installation on AM5 and LGA 1851|1700 platforms.
- Versatile Compatibility: 152mm tall design offers performance with wide chassis compatibility.
- Easy Installation: Easy to install with included thermal paste for hassle-free setup and optimal cooling performance.
- Shut down, unplug, and let the system cool.
- Remove the cooler according to its manufacturer’s instructions.
- Clean old compound from the CPU heat spreader and cooler cold plate with appropriate high-purity isopropyl alcohol and lint-free material; let both surfaces dry completely.
- Apply the quantity and method recommended by the cooler or CPU manufacturer.
- Reinstall evenly, tightening in a cross pattern where applicable, and reconnect the fan or pump.
- Verify that cooling hardware operates, then retest with the same workload.
Do not treat one dot, line, or spreading pattern as universally best. The compound, socket, cold plate, and mounting pressure all matter; correct contact and even mounting are the priorities. AMD’s processor handling guidance calls for suitable thermal interface material and uniform application.
Review BIOS and power settings
Manual overclocking, automatic boost-enhancement features, high voltage, unlimited or motherboard-enhanced power limits, and slow or misconfigured fan curves can all affect temperature. A BIOS update may also change default behavior. Record or photograph custom settings before changing them.
- Enter BIOS/UEFI using the method specified for your motherboard, and record relevant settings.
- Load the optimized or default settings, save, and reboot.
- Retest under the same workload.
- If the issue improves, re-enable custom settings one at a time and retest to identify the cause.
Menu names and controls vary by motherboard. Update BIOS only by following the manufacturer’s procedure and with stable power; do not flash firmware during an unstable overheating condition unless the manufacturer directs you to. Intel recommends trying BIOS defaults or an update as part of troubleshooting, while advising users to note existing settings first.
Overclocking or changing voltage is an advanced step, not a default temperature fix. Intel warns that clock or voltage changes can reduce stability, performance, security, or component life and may affect warranty treatment. Power limiting can reduce heat and noise, but may also lower sustained workload performance. Undervolting can cause intermittent instability, and some processors or laptops restrict it. After any change, test with the applications you normally use; cooler does not necessarily mean faster.
Best Value
- Simple, High-Performance All-in-One CPU Cooling: Renowned CORSAIR engineering delivers strong, low-noise cooling that helps your CPU reach its full potential
- Efficient, Low-Noise Pump: Keeps your coolant circulating at a high flow rate while generating a whisper-quiet 20 dBA
- Convex Cold Plate with Pre-Applied Thermal Paste: The slightly convex shape ensures maximum contact with your CPU’s integrated heat spreader, with thermal paste applied in an optimised pattern to speed up installation
- RS120 ARGB Fans: RS ARGB fans create strong airflow and high static pressure, with easy ARGB control via a compatible motherboard. CORSAIR AirGuide technology and Magnetic Dome bearings ensure great cooling performance and low noise
- Easy Daisy-Chained Connections: Reduce the wiring in your system by daisy-chaining your RS ARGB fans and connecting them to just one 4-pin PWM fan header and one +5V ARGB header
Upgrade cooling only after identifying the limit
If the cooler is installed correctly and working but cannot handle the processor’s sustained workload at an acceptable noise level, improve cooling or reduce power. Check socket support, case clearance, memory clearance, radiator fit, and airflow before buying hardware. A larger cooler will not fix a runaway process, bad mount, failed pump, incorrect wiring, blocked vent, or excessive firmware voltage.
Air coolers avoid pump and liquid-loop failure modes and are often simpler to install and diagnose; their performance still depends on heatsink size, fan, mounting, and case airflow. An AIO can handle substantial sustained loads and move heat to a radiator, but adds a pump, tubing, radiator, and controller, along with compatibility and failure considerations. Neither type is universally better; choose for the CPU’s power, case, workload, noise goals, and installation constraints.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What laptop owners should do differently
Laptop cooling is constrained by the chassis, heat pipes, fans, and manufacturer firmware. Intel notes that laptop OEMs set power and current limits, so exact controls and service options depend on the model. Intel’s throttling guidance describes this OEM role.
- Use the laptop on a hard, flat surface and keep intake and exhaust vents clear.
- Remove dust from external vents without forcing debris deeper inside.
- Compare the manufacturer’s quiet, balanced, or performance mode, if offered.
- Check the manufacturer’s support page or utility for BIOS, chipset, or thermal-management updates.
- Note whether heat occurs at idle, during gaming, while charging, or only with an external display. Compare capped and uncapped frame rates if gaming is the trigger.
- If the laptop is under warranty, contact the manufacturer before opening it.
- Arrange service if internal cleaning requires disassembly or if a fan, heat pipe, or cooling assembly appears to have failed.
A cooling pad may improve intake airflow on some laptop designs, but it cannot repair a blocked internal heatsink, failed fan, damaged heat pipe, poor thermal contact, or firmware power behavior. Check the laptop’s intake design before treating one as a solution.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Recognize thermal throttling—and distinguish it from other limits
Thermal throttling is a reduction in clock speed or power because temperature is the constraint. Possible signs include clock speeds falling below expectations during sustained work, declining performance, stuttering, loud fans, or a temperature that stays near the model’s limit. Intel lists reduced frequency, general slowness, fan noise, and automatic shutdown among possible overheating symptoms. Intel’s overheating symptom guidance and throttling guidance describe these behaviors.
- Thermal limit: Temperature is forcing a reduction.
- Power limit: The configured or platform power allowance is constraining performance.
- Current or electrical limit: The platform is limiting current delivery.
- Application or GPU limit: The CPU may not be the bottleneck, even if performance is poor.
Check the monitoring tool’s reported reason for the limit before changing settings. Lowering temperature may not improve performance if the system is now constrained by power, current, the GPU, memory, storage, or the application itself.
When to seek repair or replace a part
Stop repeated load testing and seek manufacturer or repair-shop help when shutdowns recur, a fan or pump has failed, a heat pipe or mount is damaged, or high temperatures persist after airflow, workload, installation, and firmware checks. This is especially important for a laptop or prebuilt desktop under warranty, or a system that requires proprietary disassembly. A replacement fan, cooler, or thermal compound makes sense only when inspection identifies that component as the problem.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
