PCI Express x16是什么意思？

PCI Express x16 @ x16\u662f\u4ec0\u4e48\u610f\u601d

PCI Express\u6280\u672f\u662fIntel\u57282001\u5e74\u5c31\u63d0\u51fa\u6765\u7684\u7b2c\u4e09\u4ee3\u8f93\u5165\u8f93\u51fa\u6280\u672f\uff08Third Generation I/O,3GIO\uff09\uff0c\u662f\u4e3a\u4ee3\u66ffPCI\u603b\u7ebf\u800c\u751f\u7684\u3002PCI Express\u603b\u7ebf\u662f\u4e00\u79cd\u70b9\u5bf9\u70b9\u4e32\u884c\u901a\u7528\u603b\u7ebf\uff0c\u53ef\u4ee5\u8ba9\u4e24\u4e2a\u8bbe\u5907\u4e4b\u95f4\u6784\u7b51\u8d77\u4e00\u6761\u4e13\u7528\u901a\u9053\uff0c\u76f8\u4e92\u95f4\u76f4\u63a5\u4f20\u8f93\u6570\u636e\uff1b\u800c\u5728\u540c\u4e00\u65f6\u523b\u4e00\u7ec4PCI Express\u7ebf\u8def\u53ea\u80fd\u4f20\u8f93\u4e00\u4f4d\u6570\u636e\uff0c\u4f46\u662f\u5b83\u7684\u4f20\u8f93\u901f\u7387\u53ef\u9ad8\u8fbe2.5Gbps\uff0c\u5c31\u662f\u8bf4\u53ef\u4ee5\u8fbe\u5230250MB/s\u3002
\u800c\u4e14PCI Express\u7ebf\u8def\u53ef\u4ee5\u534f\u540c\u5de5\u4f5c\uff0c\u5c31\u662f\u8bf4\u53ef\u4ee5\u51e0\u7ec4PCI Express\u7ebf\u8def\u4e00\u8d77\u4f20\u8f93\u6570\u636e\uff0c\u6240\u4ee5\u5c31\u6709 PCI Express X1\u3001X2\u3001X4\u2026\u2026\u76ee\u524d\u6700\u9ad8\u53ef\u5230X32\uff0c\u800c\u663e\u5361\u91c7\u7528\u7684\u662fX16\u6a21\u5f0f\uff0c\u7406\u8bba\u4e0a\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u53ef\u8fbe\u5230250MB/s*16=4000MB/s=4GB/s\u3002AGP\u5219\u662f\u4e00\u79cd\u4e13\u4e3a\u663e\u5361\u5f00\u53d1\u7684\u5e76\u884c\u4f20\u8f93\u6280\u672f\uff0c\u6bcf\u6b21\u53ef\u4ee5\u4f20\u8f9332\u4f4d\u6570\u636e\uff0c\u6700\u9ad8\u5de5\u4f5c\u901f\u5ea6\u2014\u5373AGP 8X\u2014\u53ef\u4ee5\u8fbe\u5230533MHz\uff0c\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e3a2.1GB/s\uff0c\u7531\u4e8e\u7ebf\u8def\u957f\u5ea6\u3001\u4fe1\u53f7\u4e32\u6270\u7b49\u95ee\u9898\uff0cAGP\u7684\u901f\u5ea6\u63d0\u5347\u4e5f\u8d70\u5230\u4e86\u5c3d\u5934\uff0c\u663e\u7136\uff0cPCI Express X16\u7684\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u8981\u6bd4AGP8X\u5feb\u5f97\u591a\uff0c\u53d1\u5c55\u6f5c\u529b\u4e5f\u5927\u5f97\u591a\u3002

\u6211\u8bb2\u4e0d\u4e86\u591a\u4e48\u8be6\u7ec6 \u590d\u5236\u8d44\u6599\u7ed9\u4f60\u5427PCI-Express\u662f\u5f53\u524d\u4e3b\u6d41\u7684\u603b\u7ebf\u548c\u63a5\u53e3\u6807\u51c6\uff0c\u5b83\u539f\u6765\u7684\u540d\u79f0\u4e3a\u201c3GIO\u201d\uff0c\u662f\u7531Intel\u63d0\u51fa\u7684\uff0c\u5f88\u660e\u663eIntel\u7684\u610f\u601d\u662f\u5b83\u4ee3\u8868\u7740\u4e0b\u4e00\u4ee3I/O\u63a5\u53e3\u6807\u51c6\u3002\u4ea4\u7531PCI-SIG\uff08PCI\u7279\u6b8a\u5174\u8da3\u7ec4\u7ec7\uff09\u8ba4\u8bc1\u53d1\u5e03\u540e\u624d\u6539\u540d\u4e3a\u201cPCI-Express\u201d\u3002\u8fd9\u4e2a\u65b0\u6807\u51c6\u5c06\u5168\u9762\u53d6\u4ee3\u73b0\u884c\u7684PCI\u548cAGP\uff0c\u6700\u7ec8\u5b9e\u73b0\u603b\u7ebf\u6807\u51c6\u7684\u7edf\u4e00\u3002

PCI-E\u7684\u63a5\u53e3\u6839\u636e\u603b\u7ebf\u4f4d\u5bbd\u4e0d\u540c\u800c\u6709\u6240\u5dee\u5f02\uff0c\u5305\u62ecX1\u3001X4\u3001X8\u4ee5\u53caX16\uff0c\u800cX2\u6a21\u5f0f\u5c06\u7528\u4e8e\u5185\u90e8\u63a5\u53e3\u800c\u975e\u63d2\u69fd\u6a21\u5f0f\u3002PCI-E X1\u80fd\u591f\u63d0\u4f9b250MB/s\u7684\u4f20\u8f93\u901f\u5ea6\uff0c\u663e\u5361\u7528\u7684PCI-E X16\u5219\u8fbe\u5230\u4e864GB/s\uff0c\u7531\u4e8ePCI-E\u603b\u7ebf\u53ef\u4ee5\u5728\u4e0a\u4e0b\u884c\u540c\u65f6\u4f20\u8f93\u6570\u636e\uff0c\u56e0\u6b64\u901a\u5e38\u8bf4PCI-E X16\u7684\u5e26\u5bbd\u4e3a8GB/s\uff01
\u4ee5\u76ee\u524d\u7684\u60c5\u51b5\u6765\u770b\uff0cPCI-E X16 8GB/s\u7684\u901f\u5ea6\u5bf9\u4e8e\u663e\u5361\u6765\u8bf4\u662f\u7ef0\u7ef0\u6709\u4f59\u7684\uff0c\u63a5\u53e3\u5e26\u5bbd\u8fd8\u6ca1\u6709\u8fbe\u5230\u74f6\u9888\uff0c\u5e76\u4e0d\u4f1a\u9650\u5236\u663e\u5361\u6027\u80fd\u7684\u53d1\u6325\u3002\u4f46\u662fPCI-E\u7684\u89c4\u8303\u5236\u5b9a\u8005PCI-SIG\u5df2\u7ecf\u5728\u9a6c\u4e0d\u505c\u8e44\u7684\u5f00\u53d1\u4e0b\u4e00\u4ee3\u603b\u7ebf\u6807\u51c6\u4e86\uff0c\u8fd9\u88ab\u79f0\u4e3aPCI-E 2.0\u3002

PCI-E 2.0\u76f8\u5bf9\u4e8e\u76ee\u524d\u76841.0\u6765\u8bf4\uff0c\u7684\u786e\u662f\u540d\u526f\u5176\u5b9e\u7684\u53cc\u500d\u89c4\u683c\uff1a

\u25cf \u5e26\u5bbd\u7ffb\u500d\uff1a\u5c06\u5355\u901a\u9053PCI-E X1\u7684\u5e26\u5bbd\u63d0\u9ad8\u5230\u4e86500MB/s\uff0c\u4e5f\u5c31\u662f\u53cc\u54111GB/s\uff1b

\u25cf \u901a\u9053\u7ffb\u500d\uff1a\u663e\u5361\u63a5\u53e3\u6807\u51c6\u5347\u7ea7\u5230PCI-E X32\uff0c\u5e26\u5bbd\u53ef\u8fbe32GB/s\uff1b

\u25cf \u63d2\u69fd\u7ffb\u500d\uff1a\u82af\u7247\u7ec4/\u4e3b\u677f\u9ed8\u8ba4\u5e94\u8be5\u62e5\u6709\u4e24\u6761PCI-E X32\u63d2\u69fd\uff1b

\u25cf \u529f\u7387\u7ffb\u500d\uff1a\u76ee\u524dPCI-E\u63d2\u69fd\u6240\u80fd\u63d0\u4f9b\u7684\u7535\u529b\u6700\u9ad8\u4e3a75W\uff0c2.0\u7248\u672c\u53ef\u80fd\u4f1a\u63d0\u9ad8\u81f3200W\u4ee5\u4e0a\uff0c\u76ee\u524d\u8fd8\u4e0d\u786e\u5b9a\u3002

PCI Express（以下简称PCI-E）可以达到PCI所不能提供的高带宽。相对于传统PCI总线在单一时间周期内只能实现单向传输，PCI-E的双单工连接能提供更高的传输速率和质量，它们之间的差异跟半双工和全双工类似。 PCI-E的接口根据总线位宽不同而有所差异，包括X1、X4、X8以及X16，目前PCI Express X16用于取代AGP（独立显卡）接口，能够提供5GB/s的带宽，远超过AGP 8X的2.1GB/s的带宽。

简单点就是独立显卡插槽的意思

扩展阅读：sata port1 ... sata hdd ... bxbx插槽 ... checking media ... pcie x16 ... express x16 ... xhci preboot mode ... sata controller mode ... launch csm ...