What 4K modes does MacBook Pro (Late 2011, Radeon HD6750M) support?

I have a MacBook Pro Late 2011, and I'm planning to buy a 4K monitor (http://www.samsung.com/levant/consumer/computers-peripherals/monitors/led-monitor/LU28D590DS/ZN).

However, all the Internet is bloated about 4K support with different answers about 4K support on MBPs. Some say it's not possible, some say only at 30 or 24Hz, some say with multistream etc.

What can I exactly get with late 2011 MacBook Pro (Mavericks 10.9.4) in terms of 4K?

I have a Dell P2815Q monitor (nearly 4K) connected to my MacBookPro Early 2011 running 10.9.4 (13E28)

From the official source

Graphics and video support

AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory on 2.2GHz configuration; or AMD Radeon HD 6770M graphics processor with 1GB of GDDR5 memory on 2.4GHz configuration.

Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors.

Sorry, you will not get 4k resolution due to the Graphics card you have.