I have 8 GB Ram. G Skill Ripjaw 4 GB x2 DDR3 1600 mhz running on asrock b85 board. I use i5 4570 and will soon buy a rx 580 8gb. I mainly game at 1080p. My question is do I need to increase my ram ? If yes; to what 12 or 16 Gb ? If 16; 2 4gb or single 8 gb ? I know there r some compatibility issues, latency, clock blah blah; dont have a clear idea. So I need suggestion. Thanks.