The Thermalright MST-9775 LE is an Intel Core 2 Duo
socket 775 heatsink designed with motherboards whose MOSFET cooling solutions
are a little too bulky and too close the processor socket. It circumvents
obvious problems of clearance by elevating the bulk of the cooling fins 45mm
above the base. With its use, MOSFET heatsinks and other electrical components
will have the freedom to breath. These board mounted devices will also receive a
healthy flow of cooler exhaust airflow from the MST-9775 LE's down-mounted 92mm
PWM fan. Using exhaust air in this manner is an effective and oft under utilized
means of cooling adjacent motherboard components without introducing more noise
or extra fans into a PC.
The Thermalright MST-9775 LE is
a two-heatpipe heatsink, and it doesn't have all that much in the way of surface
area for cooling. The compact heatsink measures a modest 90mm tall, about 110mm
square. It weighs 430grams.
LGA775 mounting bracket is sold with the Thermalright MST-9775 LE heatsink, but there's nothing stopping it from
being used with other Thermalright mounting brackets from what we can
MST-977 5LE Heatsink
|Model No.: MST-9775 LE|
|Materials: Nickel plated
aluminum fins, copper base and heatpipes|
|Fan Mfg: Talent Top Ltd.
|Fan Spec: 500-2500RPM, 12V,
|Fan Dim: 92x92x25mm|
|Heatsink & Fan Dim:
|Weight: 430 grams|
|Includes: Thermal compound,
mounting hardware, instructions|
Compatible with Sockets: 775
|Est. Pricing: $35USD
Thermalright have a very good reputation for building
heatsinks, but it seems as though the MST-9775 LE may suffer from a lack of
sufficient cooling surface area. The heatsink performs at a fairly average level
as you'll see on subsequent pages of this review. As with any heatsink, cooling
capability is often a measure of airflow, surface area and the efficiency of
whatever mechanism is conducting heat from the CPU to the cooling fins. If one
mechanisms fails, for whatever reason, the performance of the heatsink on a
whole is diminished.
But let's not get too far ahead of ourselves in this Frostytech review of the
Thermalright MST-977SLE heatsink. A 360 degree look at the cooler is next, and
then we dive into acoustic and thermal reference charts which directly compare
it to over 50 other heatsinks...
FrostyTech's Test Methodologies are outlined in detail here if you care to know what equipment is
used, and the parameters under which the tests are conducted. Now let's move
forward and take a closer look at this heatsink, its acoustic characteristics,
and of course its performance in the thermal tests!