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agp是什么？apg和pci-e有什么关系？

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agp是什么？apg和pci-e有什么关系？近期有用户听闻自己电脑中有agp插槽，还说现在大多都是pci-e的接口，表示很纳闷，活在梦里完全不知道是什么意思！其实AGP和PCI-E都是显卡插槽的接口，目前电脑中的主板上的显卡插槽都是pei-e的接口，AGP已经非常稀少了，如果你的主板上显卡接口是APG也就说明了该电脑的使用寿命的长久性！

如下图所示分别为PCI-E和AGP插槽的图片：


什么是APG接口：

AGP英语全称是Accelerate Graphical Port(加速图形接口)或者Advanced Graphics Port(高级图形端口)的缩写。加速图形接口和高级图形端口其实是一回事。是继PCI插口之后出现的。英特尔于1996年7月正式推出了AGP接口，它是一种显示卡专用的局部总线。严格的说，AGP不能称为总线，它与PCI总线不同，因为它是点对点连接，即连接控制芯片和AGP显示卡，但在习惯上我们依然称其为AGP总线。图形系统接口的一种，目前被已经淘汰的图形系统接口。AGP 8X的带宽上限是2.1GB/s。

AGP接口的发展经历了AGP1.0(AGP1X、AGP2X)、AGP2.0(AGP Pro、AGP4X)、AGP3.0(AGP8X)等阶段，其传输速度也从最早的AGP1X的266MB/S的带宽发展到了AGP8X的2.1GB/S。

什么是PCI-E接口：

PCI-Express是最新的总线和接口标准，它原来的名称为“3GIO”，是由英特尔提出的，很明显英特尔的意思是它代表着下一代I/O接口标准。交由PCI-SIG(PCI特殊兴趣组织)认证发布后才改名为“PCI-Express”。这个新标准将全面取代现行的PCI和AGP，最终实现总线标准的统一。 APG与PCI-E接口数据对比如下：

总线类型：AGP-8X                                数据传输率：2.133GB/S总线类型：PCI Express8X(双通道)    数据传输率：4GB/S总线类型：PCI Express16X(双通道)  数据传输率：8GB/S
PCI-E的优势就是传输率快，早在几年前就开始普及，目前已经完全取代了APG接口。如果哪天你的主机被告知是APG显卡插槽说明你的电脑已经有些年头，性能什么完全跟不上现在的软件的硬件需求，的那么你真的可以换主机啦！
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