Abstract: The Verax Helado PWM-T heatsink is the newest uber-quiet heatsink from the German manufacturer Verax Ventilatoren
GmbH. A couple other insightful thermal design aspects come into play
to create a nice low noise thermal solution.
|360° View - Verax Helado
Information on Frostytech's test
methodology is available
||The Heatsink Fan: |
The 92x92x25mm fan will spins at 1100-2800RPM, depending on
the CPU temperature with compatible Pulse Width Modulation enabled motherboards. The fan draws power
from a 4-pin PWM motherboard fan header, and is backwards compatible with 3-pin types. The
seven bladed impeller is translucent, but not LED illuminated. The
fan is held in place on the Helado heatsink by rubber mounting
posts, and because the motor is double ball bearing it is very quiet. There
is a thermistor located just behind the motor of the Xinruilian fan as well.
The Looking down at the top of the Verax
Helado PWM-T heatsink the four sets of 6m diameter copper
heatpipes can be seen poking their tops through either side. The heatpipes, and indeed
the whole fin section, is slanted at 10° within the 52 x 104mm
space it occupies. The aluminum fan shroud is attached to the rest of the
heatsink with a couple screws, and in
turn the fan is attached to the shroud with those nifty anti-vibration rubber posts.
The Helado is shown with its LGA775 mounting brackets installed in all of these photos,
and from this angle you can see how the are affixed. Note the elegant and slightly
eccentric concave swoop in the front/rear edge of the cooling fins.
Heatsink Side A:
The stacked aluminum cooling fin section
stands 98mm tall, and as you can see the overlapping joints and heatpipes
are staggered at a 10° angle. Each aluminum fin is nickel plated and 0.5mm thick. The 39 fins are separated 2.0mm from one another;
such wide fin spacing is ideal for slow moving air as there
is less resistance to airflow. Curiously, the fan
shroud has holes punched for a 92mm fan on the rear as well. The
Verax Helado PWM-T uses push-pin type Intel connectors for socket 775 processors. When used on socket AM2
or socket 754/939/940 AMD K8 processors the mounting brackets shown here are removed and a simple metal bracket slides into the groves cut into the top of the base (which you can see here). The entire heatsink
stands ~127mm tall.
Heatsink Side B:
The four copper
heatpipes are nickel plated and soldered at the fin and base for
optimum thermal transmission. Behind the 92mm fan is
a plenum about 4mm deep - fairly average. The base consists of a
nickel-plated copper section to which the heatpipes are soldered, and a base
cap made from aluminum that is also nickel plated. The copper
base is 5mm thick and set at a 10° angle as well.
We previously mentioned that there was one simple
thing Verax could have done to reduce errant
rattles on the Helado PWM-T heatsink, and
here's why. The side flaps of the aluminum fan shroud are only attached at
of the heatsink, so the bottom edges
float just above the edges of the aluminum fins. Under some situations
this may cause a rattling sound (to be
clear, we didn't have this problem at all during our tests) if they
start vibrating. Before you install this heatsink, stuff a little bit of
foam or double sided tape under the bottom edge of the
shroud. That should take care of any potential rattles in the future.
The nickel plated copper base measures 39 x
39mm and mostly covers the AMD K8 processor integrated heat spreader (the
sides are angled at 15°). The four 6mm diameter heatpipes are soldered to the base, and with only
2mm separating them from the CPU they are well positioned to absorb
heat. The base has a machined finish and is perfectly flat
in both axis. Surface roughness is on the order of ~32 microinches,
which is considered quite good.
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