Need help choosing a new Video Card

[athletefixer]

I have a HP Pavillion m94021
965 Quad Core
7 GB memory
640GB HD
running windows 7
My previous video card was a Radeon 512MB PCI express X16. I do not know what card I should replace it with. I am not an extreme gamer but do like to play games on the computer. What Video card should I get

 

[clutchc]

First you need to determine if your PSU can handle a good gfx card. What is the make/model of your PSU? Also, what resolution is your monitor?

 

[athletefixer]

First you need to determine if your PSU can handle a good gfx card. What is the make/model of your PSU? Also, what resolution is your monitor?

 

[athletefixer]

Not sure what PSU is
Its 2.3GHz (95) watts
It came with GeForce 6150SE nForce 430 as its video card but ai replaced that with my Redeon. Pwer supply is 300W

 

[clutchc]

That's not much information. But I'm going to assume you have a typical OEM 300W PSU with a small +12V rail. It probably doesn't have any PCIe aux power cables/connectors either. So I'm going to recommend an HD 7750 1GB card. They are fine for 1680x1050 resolution displays and below and don't require aux power.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007709%20600298541%20600007779&IsNodeId=1&name=1GB&Order=PRICE&Pagesize=20