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Overview
Expansion Slots
Expansion cards are used to increase and expand a computer’s capability.
擴充卡用於增強和擴展計算機的功能
Communication-based cards can also expand the feature set of the computer through adding a modem or network card.
基於通信的卡還可以通過添加調製解調器或網卡來擴展計算機的功能集。
Users who want to play more games may find it useful to add a new video card with better graphics capabilities.
想要玩更多遊戲的用戶可能會發現添加具有更好圖形功能的新視頻卡很有用。
However, most commonly, expansion slots are used to add new ports and new features, such as ports and features that were initially unavailable when the computer was created, such as eSATA, FireWire, or USB 3.0 ports.
但是，最常見的是，擴展槽用於添加新端口和新功能，例如在創建計算機時最初不可用的端口和功能，例如eSATA，FireWire或USB 3.0端口。
PCI PCI-X Slots
PCI was originally developed in the early 1990s to provide an expansion slot for network, video, audio, I O (input output), modem, and storage host adapter cards.
PCI最初是在1990年代初開發的，旨在為網絡，視頻，音頻，I O（輸入 輸出），調製解調器和存儲主機適配器卡提供擴展插槽。它取代了較早的技術，例如行業標準體系結構（ISA）卡，以提供更快，更強大的擴展卡插槽。
The subsequent upgrade is called PCI-X, which is a faster 64-bit version that runs at a bus speed of 133 MHz.
隨之而來的升級稱為PCI-X，它是一種更快的64位版本，以133 MHz的總線速度運行。
This PCI-X can be found in modern computers that still have PCI PCI-X slots. It is fully backward compatible with old PCI cards, but if you mix them with newer PCI-X cards, the motherboard defaults to Slower PCI speed
該PCI-X在仍然具有PCI PCI-X插槽的現代計算機中可以找到，它與舊的PCI卡完全向後兼容，但是如果將它們與更新的PCI-X卡混合使用，則主板默認設置為較慢PCI速度
The latest version of PCI-X 2.0 supports speeds up to 266 MHz to 533 MHz, but has been replaced by the PCIe (PCI Express) card slot standard to achieve better speed performance.
最新版本的PCI-X 2.0支持最高266 MHz至533 MHz的速度，但已被PCIe（PCI Express）卡插槽標準所取代，以實現更好的速度 性能。
Since Apple Computers and AMD chipsets, it has been a standard expansion bus. Although PCI is definitely a traditional architecture, it has been replaced by PCIe and Thunderbolt interfaces, but it is still included in current motherboards and can be found in most computer workstation services.
Apple Computers和AMD芯片組以來，一直是標準的擴展總線。儘管PCI絕對是一種傳統架構，但已被PCIe和Thunderbolt接口取代，但它仍包含在當前主板中，並且可以在大多數計算機工作站的服務中找到。
Summary
The PCI bus operates independently of the system bus, so that expansion cards can be used to access peripheral devices faster.
PCI總線獨立於系統總線運行，從而可以使用擴展卡更快地訪問外圍設備。
The PCI version initially uses a 32-bit data path and finally uses a 64-bit data path. The speed is as follows
133 MB s (32-bit, 33 MHz-standard configuration)
266 MB s (32-bit at 66 MHz or 64-bit at 33 MHz)
533 MB s (64-bit at 66 MHz)
PCI版本最初使用32位數據路徑，最終使用64位數據路徑，速度如下
133 MB s（32位，33 MHz –標準配置）
266 MB s（66 MHz時為32位或33 MHz時為64位）
533 MB s（66 MHz時為64位）
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