GIGABYTE Poseidon 310 - Manual (Page 9)

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4-2.3 Secure the motherboard with the securing
screws (Please refer to your motherboard
manual to check what type of motherboard
you have).
4-3 Installation of Add-on Card
The Poseidon 310 does not require any tools for installation of
add-on cards, e.g. Graphics card and network card.
Required Tools: None
4-3.1 Unlock the corresponding PCI tool-free
fastener by pushing it downwards.
4-3.2 Lift the fastener upwards and remove the
internally attached dust-proof PCI cover.
4-3.3 Insert the add-on card into the expansion
slot and then lock the PCI tool-free fastener.
Motherboard Code name Motherboard screws Case copper post
ATX A1-A9 9 9
Micro ATX U1-U9 9 9
Flex ATX F1-F6 6 6