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W83783G is an evolving version of W83782G --- Nuvoton's most popular hardware status monitoring IC. W83783G can be used to monitor several critical hardware parameters of the system, such as voltage, fan speed, and temperature, which are very important for a high-end computer system to work stably and properly. W83783G provides I2C serial bus interface.
An 8-bit analog-to-digital converter (ADC) is built inside W83783G. W83783G has 6 analog voltage inputs, 3 fan tachometer inputs, and 3 remote temperature sensor inputs. W83783G provides 2 PWM (pulse width modulation) outputs for fan speed control; beep tone output and SMI#, OVT# signals for system protection events.
Additionally, 5 VID inputs are provided to read the VID of CPU (i.e. PentiumTM II) if applicable. This is to provide the Vcore voltage correction automatically. Also W83783G uniquely provides an optional feature: early stage (before BIOS was loaded) beep warning. This is to detect if the fatal elements presents --- Vcore or +3.3V voltage fail, and the system can not be boomed up. The working voltage is 5V, and the package is 24-pin SOP. | 
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