Hi,
Currently your machine has Radeon R7 240 card:
http://support.hp.com/us-en/document/c04324956
This card consumes ~50 W.
You can replace this card with another card but you need
(a) New card must only use ~50 W or under. If over 50W, you need to change the PSU,
(b) Check BIOS of your computer and update to the latest one.
Regards.
BH***
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