Lenovo IdeaCentre K430 - Manual (Page 38)

b. Remove the screw that secures the graphics card latch to the chassis, open it, and remove
the Duo-graphics cards connector.
1
2
3
4
c. Remove the graphics card by pulling it straight out of the connector.
If your computer has a single graphics card installed, follow the steps below to replace it:
32 IdeaCentre K430/K410Hardware Maintenance Manual