Advise needed in buying a Graphic card Under5k

[vinaymamgain1]

I want to buy a graphic card. my purpose is to be able to use premier pro for video editing. Please advice a decent graphic card. I stretch my budget upto 4K.
Below is my system configuration.

System Manufacturer INTEL_
System Model DH61WW__
System Type x64-based PC
Processor Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz, 3100 Mhz, 2 Core(s), 4 Logical Processor(s)
RAM: 4GB

 

[Vish2a9l]

R7 250/ hd 6670

 

[tamatarpakoda]

Adobe's Mercury Playback Engine works with a few graphics cards properly. A detailed list of all those cards can be found here.

Adobe Premiere Pro CC for Mac, Windows, PC - Tech specs

Another thing you could try out would be to buy a second hand GPU with slightly higher specifications. This way you can squeeze more in the same budget but without the warranty.