![]() ![]() Assuming the clock speed is stuck at one frequency (even immediately after booting when the computer is still cold) and that the CPU temperature sensors seem to work, then it's probably because quiet mode is enabled. You can see similar throttling (normally temporary) if your fans are broken or don't work well. I think in active cooling mode both fans and throttling are used but throttling is only enabled if your computer runs hot even with fans active.) (Such as the "system cooling policy", which can be set to either active cooling ( fans) or passive cooling ( throttling). There are power settings in Windows that will similarly throttle CPU speed to reduce power consumption. You should also restore other power settings to their default values after toggling "quiet" or "fan-less" mode. From my experience with this issue on Windows 7/8 the only way I could disable it was using the keyboard. I'm not sure if the setting can be disabled by software. (Of course with the fans disabled it won't stay very cool.) It is supposed to make the computer draw less current and thus run cooler. Recently I noticed that my CPU is somehow being throttled and I have no idea. If a Surface Pro (with a 2017 CPU) doesnt have performance differences. This mode locks the clock speed to its minimum value. The 2 core stress sees the clock speed step down and oscillating mostly between. The frequency is usually some multiple of 400 MHz or 800 MHz on consumer Intel machines. With the latest firmware release for the Surface Book 2, Microsoft says it has tackled the gremlin: 182.1004.139.0 resolves an issue where the CPU will throttle down to. Your CPU is capable of running at variable clock speeds. The CPU usage would slowly drop, as before, but when the system throttles the CPU down to 50, the CPU usage graph would spike up, since its 35 usage of maximum CPU is 70 of available CPU. If it's not controlled by the keyboard then it's possible that it's a BIOS setting. It's easy to accidentally enable if it's one of the function keys alongside volume control, screen brightness, keyboard backlight, etc. On some laptopts it's controlled using the keyboard. It tries to reduce how much heat your computer produces and disables fans. Never place your device or AC adaptor on furniture or any other surface that might be marred by exposure to heat since the base of your device and the surface of the AC adaptor may increase in temperature during normal use.Some laptops have a quiet mode feature. If your device is on your lap and gets uncomfortably warm, remove it from your lap and place it on a stable work surface. While the temperature may not feel hot to the touch, if you maintain physical contact with the device for a long time, for example if you rest the device on your lap, your skin might suffer a lowheat injury. If your device is used for long periods, its surface can become very warm. Take special care if you have a physical condition that affects your ability to detect heat against the body. For example, don’t sleep with your device or its power adapter, or place it under a blanket or pillow, and avoid contact between your body and your device when the power adapter is connected to a power source. Use common sense to avoid situations where your skin is in contact with your device or its power adapter when it’s operating or connected to a power source. Allow for adequate air circulation under and around the device. Keep your device and its power adapter in a well-ventilated area when in use or charging. To reduce potential heat-related concerns, follow these guidelines: ![]() Still, sustained contact with warm surfaces for long periods of time may cause discomfort or injury. Microsoft Surface Pro 9 (Intel) specs Dimensions: 11.3 x 8.2 x 0.37 inches (287 x 209 x 9.3mm) Weight (not including Type Cover): 1.94lbs (879g) Display: 13-inch touch display, 2880 x 1920. It complies with the user-accessible surface temperature limits defined by the International Standards for Safety (IEC 60950-1 and IEC 62368). Your device may become very warm during normal use. As to the why, Surface devices adhere to compliance with IEC 60950-1 and IEC 62368 ( ), which is why they will try to reduce load to limit heat transfer that would cause the device to be hotter to the touch than is safe for an extended period of time as defined by those standards.Īpplies to: Surface, Surface Duo, Surface docking stations, Mobile devices, other non-wearable devices, and Xbox ThrottleStop will remove the PROCHOT throttle, but if the device is throttling for another reason (say skin temps near 50C), you have to consider other options to either reduce heat or provide active cooling. ![]()
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