|360° View - Thermalright MST-9775 LE
Frostytech's test methodology is available here.
The Thermalright MST-9775 LE heatsink
has a 92mm PWM fan positioned over the body of the unit. The fan can
spin anywhere from 500-2500RPM, but when connected by a 3-pin fan header defaults to static
speed. No fan speed controller is included. The fan is held in place
by two wire clips so fans of different sizes cannot be used.
After removing the fan, we can get a better look at the two
35x110mm panels of cooling fins used here. Two 6mm diameter nickel plated heatpipes thread their way through
the fins, the base and back through the fins. All joints are soldered to
reduce thermal joint resistance. A 21mm space at the center of this area
is left void. Each aluminum fin is 0.47mm thick, spaced 1.42mm apart.
Heatsink Side A:
Exhaust air from the 92mm fan is directed
down through the cooling fins of the Thermalright
MST-9775 LE heatsink. That exhaust air would normally flow through
the small cooling fins on the base mounting plate, further cooling
things off, except that Thermalright's LGA775 mounting clip blocks this space off completely.
The cooling fins are raised 46mm above the base to provide good clearance
around the CPU socket.
The Thermalright MST-9775 LE heatsink comes with a special metal bracket that uses
standard Intel push-to-click plastic retention feet. The system seems compatible with other forms
for brackets Thermalright has used in the past, although only the LGA775 bracket
is include with this heatsink. The base is 15mm thick, including a 5mm copper block
which has been soldered to it. Each aluminum fin in profile
measures 110mm across, 22mm deep.
The base of the Thermalright MST-9775 LE heatsink has
a sanded finish which is essentially flat in both axis.
The copper has been nickel plated, and the mounting area measures 40x36mm.
Surface roughness is equivalent to ~63 microinches, which is considered average.