For the most part the market is filled with medium to large sized Tower CPU coolers which thanks to their high cooling efficiency are suitable for use by gamers, professionals and overclockers and small to medium sized top-down CPU coolers which offer good performance levels for their size and are mostly targeted towards people with limited space in their systems such as HTPC owners. However from time to time we do see small tower type CPU coolers which can fit everywhere and usually land between the above mentioned solutions in terms of performance. The only problem with this type of coolers is quality since most of the time we see models by manufacturers who mostly care about keeping a low cost. Noctua is amongst a handful of manufacturers that put quality and performance before cost for their products and their latest NH-U9S is one such bright example.
Noctua NH-U9S 95mm CPU Cooler Review @ NikKTech