Lenovo ThinkStation P520 Hardware Maintenance Manual page 162

Install PCIe cards according to the corresponding slot types and the following illustrated installation order:
Figure 105. PCIe card installation order
Notes:
• The instructions on how to remove or install a PCIe card also applies to the PCI card.
• If your computer comes with a full-length PCIe card, refer to "Full-length PCIe card" on page 159 for its
replacement instructions.
To remove or install a PCIe card, do the following:
1. Prepare your computer. See "Preparing your computer and removing the computer cover" on page 103.
2. Lay the computer on its side for easier access to the system board.
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