Abstract: The 148mm tall copper heat column absorbs heat from the processor core, transferring it up through the center of approximately 45 thick gauge aluminum cooling fins of 125 x 77mm in size.
Page: 360° View - nPowerTek NPH-K8 Big Heatsink
|360° View - TTIC nPowerTek NPH-K8 Big
Information on Frostytech's test
methodology is available
||The Heatsink Fan: |
The nPowerTek NPH-K8 Big heatsink is built to work with
a 120x120x25mm fan that spins in the region of 1600RPM. Anything
big and relatively slow is fairly quiet as a
result. In our tests, the unit produces a little over 54 dBA. Owing to
the design of the heatsink there is no protection from errant wires
being sucked into the fans' impeller; so it's best to
organize you computer appropriately during installation. Make sure you have your wires
well routed away from the NPH-K8 Big. Over all there is 125 x 118mm worth
of cooling fin here. The fan draws power from a standard 3-pin motherboard fan header.
The top of the nPowerTek NPH-K8 Big heatsink is bare except
for the top of the 33mm diameter heat column. After being evacuated, the
mechanicals of the tube are sealed with a glossy black resin to prevent tampering.
The wire clips that hold the fan
in position securely loop through a joint cut into either side of the heatsink, and
latch onto the screw holes of the fan frame. The fan can be installed on
either side of the heatsink, and in general should always be blowing towards the rear of
the chassis. Each aluminum fin measures 126 x 77mm in size.
Heatsink Side A:
The nPowerTek NPH-K8 Big heatsink stands 148mm tall. The first aluminum cooling
fin is elevated 28mm above the surface of the CPU. Each aluminum fin measures 0.5mm
thick, and the fin pitch is ~2.0mm. The aluminum mounting bracket for
attaching the NPH-K8 Big heatsink to socket 754/939/940
motherboards is flush to the copper base of the heatsink, so be very
careful not to over tighten the mounting hardware. In our testing, we noticed dramatic temperature rises
because the copper portion of the heatsink wasn't in direct contact with the CPU die of the
synthetic temperature test platform. If there is one revision to be made to this heatsink, it would be
in this area.
||Heatsink Side B:|
The side of the nPowerTek
NPH-K8 Big heatsink is bare except for a couple slots where the fan
wire clip slips into place. The aluminum fins are not interlocking, so it's possible some
metal-to-metal rattles may eventually develop.
The copper portion of the base measures 38mm
in diameter - just the right size to virtually
cover the surface of a socket 939 AMD Athlon64 processor. The aluminum mounting hardware surrounds
this, and because the surfaces are flush it can prop the copper portion up off the CPU ISH if mounting hardware is
excessively tightened. TTIC would do well to revise this area of the
nPowerTek NPH-K8 Big heatsink a little. Surface roughness is on the order
of ~12 microinches, which is considered excellent. The copper is machined perfectly
flat, and is very smooth.
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