Dell Inspiron 5305 Low Profile card.

Can't find 5305 on the Dell site. But the spec for that card's power requirement is:

Minimum 300W or greater system power supply (with a minimum 12V current rating of 18A)

It;s saying you need 18 amps ("216W") on your 12V rail. There should be a label on your psu. You might get lucky. I wouldn't try.