Lenovo ThinkPad X1 Extreme Gen 5 Hardware Maintenance Manual page 80

Depending on model, your computer might have two M.2-solid-state-drive slots. When you configure the
M.2-solid-state-drive slot in the UEFI BIOS menu, ensure that you select the correct menu item.
• Slot a : NVMe0
• Slot b : NVMe1
Special notices for M.2 solid-state drive thermal pad
Before you replace a M.2 solid-state drive, observe the following tips to ensure you use the proper thermal
pad:
• To replace a single-sided M.2 solid-state drive with a dual-sided M.2 solid-state drive, ensure that you
replace the thick thermal pad (thickness: 2.5 mm) with a thin thermal pad (thickness: 1.25 mm) in section
1 (the section far from the M.2 solid-state drive slot).
• To replace a dual-sided M.2 solid-state drive with a single-sided M.2 solid-state drive, ensure that you
replace the thin thermal pad (thickness: 1.25 mm) with a thick thermal pad (thickness: 2.5 mm) in section
1 (the section far from the M.2 solid-state drive slot).
• For dual-sided M.2 solid-state drive, ensure that you use a thin thermal pad (thickness: 1.25 mm) in
section 1 .
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P1 Gen 5 / X1 Extreme Gen 5 Hardware Maintenance Manual