Hello, I have a Hp Slimline PC and i wanted to add a graphics card (http://www.newegg.com/Product/Product.aspx?Item=N82E16814121397) to it to runs my games better. Will my 220 watt Lieon ps-5221-06 be enough to handle it? Thanks.
No it will not be enough. That PSU is very low powered and might just be barely running your PC. You need a better PSU before you add a graphics card and be sure to get atleast 400watts minimum that will fit into your case.
He can definitely fit a low end graphics card into that computer... The slimline computer should only have a processor/integrated gpu in it only. (which is what... 50-100w at the most? since they use intel)
He can easily fit a GPU that's powered only by the PCI-E slot into that computer.....