So I am assuming that you are expecting better performance in games.
The fact of the matter is that the Radeon HD 7570 is a pretty weak graphics card compared mainstream graphic cards and performance oriented graphics cards. You cannot expect much from a reasonable priced desktop that is not even advertised as something capable of playing games.
If you want better performance in games without having to lower the resolution or lower graphics quality, then you need to buy a graphics cards. The HP also only comes with a 300w power supply (PSU) which also limits your options. A gaming oriented PC generally comes with a more powerful graphics card than the Radeon HD 7570 and a 300w PSU.
The best card I can recommend is the Radeon HD 7750 which is considered a mainstream gaming graphics card and is the minimum card I recommend for gamers on a budget, but also want good performance. The 300w PSU means that more powerful graphic cards cannot be used because they require more power than that PSU can deliver.
The following XFX Radeon HD 7750 can be purchased for $80 after a mail-in rebate. + $3 shipping.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150663
If you live in Canada, then you can buy the same card for $80 after a rebate, but shipping charges is $11.50.
http://www.newegg.ca/Product/Product.aspx?Item=N82E16814150663