ok thanks! Sorry if that was obvious. I've never done anything likethis before as I've only had a GT 710 card.that psu only has 212w on the 12v rail. so it is nowhere near able to power that card.
you need a new psu.
I believe these cards come with a adapter or is that no good? sighs 🏝❤💯👶you need to connect a pcie power connection from your psu to power the card. this is very common for all but entry level gpu's.
if your psu does not have the connection, then you need a new psu that has the proper connections.
that is a 6-pin connection on the card so that's the minimum cable your psu needs. if you don't know if you have one, then you can post your specific psu model and we can look it up for you.