Like past Zalman cooler, the CNPS9500 LED is VERY BIG. The unit has a 92mm blue LED fan and weighs in at 530 grams. This is well beyond the 450g maximum weight for an Intel Socket 775 and AMD Socket 754/939/940 cooler. Special mounting brackets are used and care must be taken when moving a computer equipped with a cooler that exceeds the specified weight limit. The CNPS9500 LED is so big that Zalman has a list of motherboards that will not fit this cooler.