TheNeoNGameR321 :
how much watts psu does low profile cards need
Hello,
Lower profile GPUs need less power than let's say enthusiast cards (from 7870/660 to gtx 780/r9 290x). A Power Supply of 400-450W will be enough for cards below that (different case if you crossfire two lower end gpu cards).
All in all, you'll be fine with a 400-500W PSU. Even a 350W PSU will be fine in some certain situations.
Although some lower end cards do use more power. Could you link the GPU you're willing to buy?
Hope this helps^^