I have just bought an Dell Inspiron 15 3521, which contains the next components:
- CPU: i3-3227U @ 1.90GHz + Intel HD Graphics 4000
- RAM: 4GB @ 1600 frequency
- AMD Radeon HD 8730M.
The laptop came out with Ubuntu 12 and I formatted everything ; after that, I installed Windows 7 x64 Ultimate SP1.
Because I haven't received any CD / DVD with its drivers, I downloaded them via Dell Support Website ( choosing my specific category ) and with an Driver Program ; first of all, I installed Intel HD Graphics 4000 and then I reboot the laptop. It worked, good graphic. The last driver that I installed, from dell support ( http://www.dell.com/support/troubleshooting/us/en/19/Product/inspiron-15-3521 - I choosed Windows 7 x64 ), AMD Radeon HD 8730M which contains this description: