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Many older laptops have CPU temperature sensors. Even back in the early 2000s, laptops and desktops often included these sensors as a way to monitor the temperature and prevent overheating. These sensors are integrated into the CPU itself or the motherboard. They help the system manage the cooling fan speeds and can trigger shutdowns if temperatures get too high, protecting the hardware from damage.

However, the accuracy and sophistication of these sensors have improved significantly over the years. So while old laptops do have them, newer models tend to have more accurate and responsive temperature monitoring systems. Have you been experiencing any issues with your laptop overheating?