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spd安装工程是什么意思？

spd安装工程是什么意思？

浏览：107次 | 提问时间： 07-30 09:45

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领略痛楚 07-30 09:46

您好，SPD(Serial Presence Detect串行存在探测)，它是1个8针的SOIC封装(3mm*4mm)256字节的EEPROM(Electrically Erasable Programmable ROM电可擦写可编程只读存储器)芯片。型号多为24LC01B，位置一般处在内存条正面的右侧，里面记录了诸如内存的速度、容量、电压与行、列地址带宽等参数*。当开机时PC的BIOS将自动读取SPD中记录的*，如果没有SPD，就容易出现*机或致命错误的现象。它是识别PC100内存的一个重要标志。现在个别厂商一方面为了降低生产成本，另一方面又要从表面上迎合PC100标准，就在PCB板上焊上一片空的SPD。这样就有可能导致在100MHz以上外频不能正常工作，还应该注意的是一些厂商出的主板(如INTEL原装板)一定要BIOS检测到SPD中的*才能正常工作，而对于使用假SPD的内存来说，就会有不兼容或*机的现象出现。

离岛 07-30 09:54

Surge Protective Device（SPD），浪涌保护器，又名电涌保护器、防雷器、避雷器，用于保护用电设备免遭雷电电磁脉冲或*作过电压破坏。

影子与我 07-30 10:02

SPD共有四个意思。第一个意思:全拼为shangpindu，即“上品都”拼音首字母组合SPD。第二个意思:Sulfachlorpyridazine，磺**哒嗪SPD。第三个意思:a symmetric and positive definite matrix，对称正定矩阵。第四个意思:硅光电二极管。

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