ajinkys :
If i play BF4 at ultra or any other high end game will that be enough ?
The typical power draw of the Intel Core i5-4570 is 68.25 Watts.
The ASUS Radeon R9 280X will only draw a peak power of 208 Watts during gaming. That graphics will draw 298 Watts when running FurMark Stability Testing.
If you fully load both the CPU and graphics card then you should be drawing enough power from the RM650 to trigger the fan to spin.
Download FurMark for free from the creator Geek3D.com:
http://www.geeks3d.com/20140313/furmark-1-13-0-download-gpu-burn-in-stress-test-opengl/