There is a bit of a performance decrease when going from the NH-U12P to the NH-U9B; however that is to be expected since the NH-U9B's heatsink is quite a bit smaller in size and also features a smaller fan. When comparing this cooler to other coolers with 90mm fans, it does very well and if you've got a small case, or not a lot of room for a cooler, this would be a great choice.



Link: BCC Hardware