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RAM DAC （Random Access Memory DAC:随机存取存储器数模转换器）的作用是将PC 机内的数字信号代码转换成显示器所用的模拟电信号。RAMDAC 是影响显示卡性能的重要器件，尤其是它所能达到的转换速度影响着显示卡的刷新率和最大分辨率，因为对于一个给定的刷新频率而言，分辨率
The function of a RAM DAC (Random Access Memory DAC) is to convert a digital signal in a PC into an analog electrical signal for display. RAMDAC is an important device that affects the performance of the graphics card. In particular, the speed of conversion it achieves affects the graphics card refresh rate and maximum resolution because, for a given refresh rate, the resolution