Graphics Upgrade

Any suggestions for an Graphics card upgrade on a Dell Inspiron 530s?

I would like to upgrade my graphics card on my desktop PC. The only problem is that it is a slimline PC so I am guessing it is not a normal upgrade. Answers with links to products are more likely to get best answer. Is there a certain fitting name i have to look for?

Public Comments

1. Well, it's a slimline PC, so that means normal coolers and no massive big fans. nVidia: budget:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/nVIDIA+GeForce+9+Series/nVidia+GeForce+9500GT+1GB+PCI-E+?productId=33063 mid-range:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/nVIDIA+GeForce+9+Series/nVidia+GeForce+9800GTX%2B+512MB+PCI-E+?productId=33059 high-performance:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/nVIDIA+GTX+260%2F280+Series/Asus+GeForce+GTX+280+1GB+PCI-E+2.0+Retail+?productId=32442 ATi: budget:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/ATI+Radeon+3000+Series/Sapphire+ATI+Radeon+HD+3650+512MB+PCI-E2.0+?productId=33232 mid-range:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/ATI+Radeon+4000+Series/Sapphire+HD+4850+512MB+PCI-E2.0+Lite+Retail+?productId=32165 high-performance:http://www.aria.co.uk/Products/Components/Graphics+Cards/PCI-E/ATI+Radeon+4000+Series/Sapphire+HD+4870+X2+2GB+PCI-E2.0+?productId=33273 By the way, the 4870X2 is way, way faster than anything nVidia has ever done by miles. Even if you put two GTX280s together its nowhere near.