I,m doing my first build and I've researched but can't determine which heatsink is most effective and feasible in vertical orientation. I'm concerned about clearance issues (VRM, GPU, RAM) and cooling. I'm considering Noctua NH-U14S and NH-D14/D15. Build: CM HAF-X RC-942-KKN1 case, ASUS Z87 PRO mobo, Trident X F3-1600C7D-16GTX ram, I7 4770k cpu, Corsair 760w Pro Series psu, and Sapphire R9-290 Vapor-X Tri-X oc GPU. I really think that vertical orientation in my case will provide the best airflow. P.S. I plan on a mild Cpu oc of 4.2 /4.