Lenovo ThinkStation P520 User Manual page 24

• Flex module
Depending on your computer model, the following parts might be installed in the flex module:
– 15-in-1 card reader
– External Serial Advanced Technology Attachment (eSATA) connector
– Four-digit diagnostic display
– Institute of Electrical and Electronics Engineers (IEEE) 1394 connector
– Slim optical drive
– Thunderbolt adapter kit
• Front-access storage enclosure
• Multi-drive conversion kit
Depending on your computer model, the following parts might be installed in the multi-drive conversion
kit:
– Storage drive (such as hard disk drive, solid-state drive, or hybrid drive)
– Slim optical drive
• Optical drive
• Slim-optical-drive adapter
3 Optional-storage-drive bays (2) (available on some models)
You can install hard disk drives, solid-state drives, or hybrid drives in the storage drive bays.
4 Storage drive bays (2)
You can install hard disk drives, solid-state drives, or hybrid drives in the storage drive bays.
5
M.2 solid-state drive slots (2)
One or two M.2 solid-state drives are installed in some models.
6 PCIe slots (5)
You can install compatible PCIe cards and PCIe solid-state drives in the PCIe card slots.
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P520 User Guide