插槽圖片
PCI Express，簡稱PCI-E，官方簡稱PCIe，是計算機總線的一個重要分支, 插槽圖片如下：
引腳定義
下表列出在邊緣連接器上的PCI Express卡兩側的導線。在印刷電路板（PCB）的焊接側為A側，並且組件側的B側。 PRSNT1# 和PRSNT2# 引腳必須比其餘稍短，以確保熱插入卡完全插入。該WAKE# 引腳採用全電壓喚醒計算機，但必須拉高從備用電源，以表明該卡是能夠喚醒
| 引腳 | B側 | A側 | 描述 | 引腳 | B側 | A側 | 描述 | |
|---|---|---|---|---|---|---|---|---|
| 1 | +12 V | PRSNT1# | 必須連接到最遠PRSNT2# 引腳 | 50 | HSOp (8) | Reserved | 通道8傳輸數據，+和− | |
| 2 | +12 V | +12 V | 51 | HSOn (8) | Ground | |||
| 3 | +12 V | +12 V | 52 | Ground | HSIp (8) | 通道8接收數據，+和− | ||
| 4 | Ground | Ground | 53 | Ground | HSIn (8) | |||
| 5 | SMCLK | TCK | SMBus和JTAG端口引腳 | 54 | HSOp (9) | Ground | 通道9傳輸數據，+和− | |
| 6 | SMDAT | TDI | 55 | HSOn (9) | Ground | |||
| 7 | Ground | TDO | 56 | Ground | HSIp (9) | 通道9接收數據，+和− | ||
| 8 | +3.3 V | TMS | 57 | Ground | HSIn (9) | |||
| 9 | TRST# | +3.3 V | 58 | HSOp (10) | Ground | 通道10傳輸數據，+和− | ||
| 10 | +3.3 V aux | +3.3 V | 備用電源 | 59 | HSOn (10) | Ground | ||
| 11 | WAKE# | PERST# | 鏈接激活；基本複位 | 60 | Ground | HSIp (10) | 通道10接收數據，+和− | |
| Key notch | 61 | Ground | HSIn (10) | |||||
| 12 | CLKREQ# | Ground | 要求運行的時鐘 | 62 | HSOp (11) | Ground | 通道11傳輸數據，+和− | |
| 13 | Ground | REFCLK+ | 參考時鐘差分對 | 63 | HSOn (11) | Ground | ||
| 14 | HSOp (0) | REFCLK− | 64 | Ground | HSIp (11) | 通道11接收數據，+和− | ||
| 15 | HSOn (0) | Ground | 65 | Ground | HSIn (11) | |||
| 16 | Ground | HSIp (0) | 通道0接收數據，+和− | 66 | HSOp (12) | Ground | 通道12傳輸數據，+和− | |
| 17 | PRSNT2# | HSIn (0) | 67 | HSOn (12) | Ground | |||
| 18 | Ground | Ground | 68 | Ground | HSIp (12) | 通道12接收數據，+和− | ||
| PCI Express ×1卡於引腳18結束 | 69 | Ground | HSIn (12) | |||||
| 19 | HSOp (1) | Reserved | 通道1傳輸數據，+和− | 70 | HSOp (13) | Ground | 通道13傳輸數據，+和− | |
| 20 | HSOn (1) | Ground | 71 | HSOn (13) | Ground | |||
| 21 | Ground | HSIp (1) | 通道1接收數據，+和− | 72 | Ground | HSIp (13) | 通道13接收數據，+和− | |
| 22 | Ground | HSIn (1) | 73 | Ground | HSIn (13) | |||
| 23 | HSOp (2) | Ground | 通道2傳輸數據，+和− | 74 | HSOp (14) | Ground | 通道14傳輸數據，+和− | |
| 24 | HSOn (2) | Ground | 75 | HSOn (14) | Ground | |||
| 25 | Ground | HSIp (2) | 通道2接收數據，+和− | 76 | Ground | HSIp (14) | 通道14接收數據，+和− | |
| 26 | Ground | HSIn (2) | 77 | Ground | HSIn (14) | |||
| 27 | HSOp (3) | Ground | 通道3傳輸數據，+和− | 78 | HSOp (15) | Ground | 通道15傳輸數據，+和− | |
| 28 | HSOn (3) | Ground | 79 | HSOn (15) | Ground | |||
| 29 | Ground | HSIp (3) | 通道3接收數據，+和− | 80 | Ground | HSIp (15) | 通道15接收數據，+和− | |
| 30 | Reserved | HSIn (3) | 81 | PRSNT2# | HSIn (15) | |||
| 31 | PRSNT2# | Ground | 82 | Reserved | Ground | |||
| 32 | Ground | Reserved | ||||||
| PCI Express ×4卡於引腳32結束 | ||||||||
| 33 | HSOp (4) | Reserved | 通道4傳輸數據，+和− | |||||
| 34 | HSOn (4) | Ground | ||||||
| 35 | Ground | HSIp (4) | 通道4接收數據，+和− | |||||
| 36 | Ground | HSIn (4) | ||||||
| 37 | HSOp (5) | Ground | 通道5傳輸數據，+和− | |||||
| 38 | HSOn (5) | Ground | ||||||
| 39 | Ground | HSIp (5) | 通道5接收數據，+和− | |||||
| 40 | Ground | HSIn (5) | ||||||
| 41 | HSOp (6) | Ground | 通道6傳輸數據，+和− | |||||
| 42 | HSOn (6) | Ground | ||||||
| 43 | Ground | HSIp (6) | 通道6接收數據，+和− | 圖例 | ||||
| 44 | Ground | HSIn (6) | 接地引腳 | 零電壓基準 | ||||
| 45 | HSOp (7) | Ground | 通道7傳輸數據，+和− | 電源引腳 | 為PCIe卡供電 | |||
| 46 | HSOn (7) | Ground | 輸出引腳 | 從PCIe卡到主板的信號 | ||||
| 47 | Ground | HSIp (7) | 通道7接收數據，+和− | 輸入引腳 | 從主板到PCIe卡的信號 | |||
| 48 | PRSNT2# | HSIn (7) | 漏極開路 | 可拉至低電平或感應到多個卡 | ||||
| 49 | Ground | Ground | 檢測引腳 | 卡連接在一起 | ||||
| PCI Express ×8卡於引腳49結束 | 備用 | 目前沒有使用，不連接 | ||||||