Power supply help

[hi1234]

Hi guys,
I need help figuring if a power supply like EVGA 400 N1 100-N1-0400-L1 400W could fit into a Hp pavilion p6803w (mid-size atx) not that good with computers.

 

[clutchc]

If this is your PC: https://atcostpc.com/productimages/xl/P6803W-PB-B-3.jpg
...it takes a standard ATX power supply. If the EVGA 400 N1 100-N1-0400-L1 400W Power Supply is what you want to use, it will fit. https://www.newegg.com/Product/Product.aspx?Item=N82E16817438038