Installed NH-D14 to my brother's Fractal Design Core 2500 Case and can ensure that the case can fit NH-D14 since from heat pipes to actual door itself is 2-3mm gap left, and front fan NF-P12 was sitting on G.Skill Ripjaws X 40mm tall ram modules was not overhanging above heatpipes, i think can use 45mm tall ram but above that you can only use middle fan, and btw i swapped middle fan - NF-P14 FLX to NF-A15 PWM and front fan NF-P12 to NF-P12 PWM since Sabertooth FX990 R2.0 mobo was running 3 pin fans on full speed when connected to CPU and CPU OPT fan headers, case fan headers are ok for 3 pin and 4 pin fans tho.