![]() ![]() ![]() Problem is, that eventually it comes at a price and after a few years (5+ in your case) the hardware begins to suffer. I'm not sure why Apple has the thresholds set up so high, perhaps to maintain a quieter all-in-one system than it's competitors. This doesn't address the problem of the fans not speeding up when it's hot at all. Why can this control panel speed up and control the fans just fine and effectively cool the iMac but left to it's default control it does nothing and allows the iMac to overheat? And has anyone had this problem and found a way to fix it? Many people seem to like SmcFanControl for some reason but I don't because it's crude and totally manual in setting the base fan speed which keeps the fan running higher than normal all the time but doesn't help much to cool if the iMac gets really hot unless you manually speed up the fan more. The one I chose as the best was Derman's version of Fan Control, a control panel which is automatic and effectively keeps all the temperatures normal and has been my solution to the problem. Then I found some of these apps that let you control the fan speed manually or customize the threshold and with some of these I was able to speed the fans up. It was a while before I had installed software that measured temperatures of devices or fan speeds inside the iMac and then determine what was happening and that indeed the iMac would shut off when the power supply got too hot. Throttling can happen frequently and the performance reduction can be severe, while the frequency and amount of throttling depends on a variety of factors, such as the laptop model, its built in cooling capacity, the laptop’s CPU/GPU power, the intensity of the applied workload, the duration of the workload, the ambient temperature, and other factors.I have a 2007 iMac that for some reason the fans won't speed up above idle and so if it's put to heavy use eventually it will overheat and shutdown. Since internal fans are already spinning at maximum speed then supplemental cooling directly onto the CPU/GPU will be required to reduce/eliminate throttling and regain performance. ![]() Once the fans spin up to full speed then it is only a matter of time before the heat being generated by the CPU/GPU builds up in the system at which point the heat may overwhelm the laptop’s built-in cooling system resulting in performance reduction as the computer throttles processor speed in order to avoid overheating. With less heat in the system then your computer will have additional passive heat sink cooling capacity available when a heavy/intensive workload is applied and the initial heat spike that occurs before the fan spin up to full speed will also be reduced. However, if you are concerned about reducing the lifespan of your internal fans then adding supplemental cooling is a good solution. Combining both a higher baseline internal fan speed and supplemental cooling will further reduce temperatures and increase cooling capacity. This system is designed to primarily cool the CPU/GPU as they are the primary heat generators.īy increasing the baseline speed of your internal fans or by providing supplemental cooling directly onto the CPU/GPU you will remove more heat from the CPU/GPU, which reduces the amount of heat that bleeds off into other components and the overall computer/enclosure. The built-in cooling system typically use one or more small fans connected to a heat pipe that is connected to a heat sink that is connected to the CPU/GPU. One reason is that laptop have more tightly packed internal components so there is less space for airflow and a greater likelihood that heat from the CPU/GPU will bleed off into other components as well as the entire computer/enclosure. ![]() Laptops have cooling systems with a built-in cooling capacity that is typically less than desktop cooling systems. The short answer is that running your internal fans at a higher baseline speed has the potential to increase performance, as does providing supplemental cooling directly onto the CPU/GPU. ![]()
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