hey guys,im making the final decisions for my computer and im about to order some coponents.can you please tell me if this would power this ?

and here are my system specs if you need them

It might be able to power it, but honestly if I were you I would spend a little extra and get at least a couple hundred extra watt PSU. The minimum power supply for that video card is 300W, so depending what other sort of hardware you're going to be running (or may decide to add in the future), 400W may not cut it.

Did you make your decision yet? Eventually you are going to have to upgrade your whole system, so my advice, buy a good 700W power supply. You can always take that power supply on a new system you make in the future.