Most graphics cards will work fine with your motherboard because it has a PCI-Express x16 slot.
Could you provide more information of your setup?
Such as your:
2. Power Supply
3. Monitor Resolution
4. Graphical applications (eg. games)
This will help it easier to choose from the array of graphics cards out there.
Oh i guess you have a Dual Core Athlon CPU, Any high end GPU will bottleneck your system besides, You have a PCIE 2.0 gen 1 slot, so you might have a problem with AMD 2.1 PCIE cards
look at this, it might be the best option for you
HD 4670 http://www.newegg.com/Product/Product.aspx?Item=N82E168...