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TEST RESULTS
Provided Fan Testing
The fan provided by Prolimatech looks like a typical seven-bladed 120mm case
fan. It was a bit mysterious though as there were no identifying marks and no
case fans are listed on the Prolimatech website. It is possible that the "suggested" fan specifications on the main Megahalems product page describe this fan, but this is just a guess.
| Brand |
Prolimatech |
Power Rating |
Unknown |
| Model Number |
Unknown |
Airflow Rating |
Unknown |
| Bearing Type |
Unknown |
RPM Rating |
Unknown |
| Hub Size |
1.54" |
Noise Rating |
Unknown |
| Frame Size |
120 x 120 x 25 mm |
Header Type |
3-pin |
| Weight |
110 grams |
Start Voltage |
2.4V |
|
TEST MEASUREMENTS
|
|
Voltage
|
SPL @ 1m
|
Speed
|
|
12V
|
20 dBA
|
1120 RPM
|
|
9V
|
16 dBA
|
920 RPM
|
|
7V
|
13 dBA
|
780 RPM
|
|
5V
|
12 dBA
|
590 RPM
|
Fan @ 12V: At full speed, the fan was turbulent and had a bit of drone. The measured sound pressure level was 20 dBA, low, at least compared to the average
case fan.
Fan @ 9V: Much of the turblence disappeared, resulting in a 4 dBA decrease. With the airflow turbulence lowered, we noticed a high degree of clicking coming from
the fan's motor.
Fan @ 7V: The fan sounded very much like the 9V level. The clicking
of the fan's motor/bearings became more noticeable despite it being quieter
overall.
Fan @ 5V: Smooth at a distance, but up close the clicking sounded
more like a rattle.
Overall the fan is fairly quiet, but it is far cry from the much smoother,
high quality fans we prefer. It's an average low/mid airflow fan with unremarkable
acoustics.
Cooling Results
|
Prolimatech Megahalems w/ provided 120mm fan
|
|
Fan Voltage
|
SPL@1m
|
Temp
|
°C Rise
|
°C/W
|
|
12V
|
20 dBA
|
30°C
|
10
|
0.13
|
|
9V
|
16 dBA
|
31°C
|
11
|
0.14
|
|
7V
|
13 dBA
|
34°C
|
14
|
0.18
|
|
5V
|
12 dBA
|
39°C
|
19
|
0.24
|
|
Prolimatech Megahalems w/ reference 120mm fan
|
|
12V
|
16 dBA
|
30°C
|
10
|
0.13
|
|
9V
|
13 dBA
|
34°C
|
14
|
0.18
|
|
7V
|
12 dBA
|
37°C
|
17
|
0.22
|
|
5V
|
11 dBA
|
40°C
|
20
|
0.26
|
Load Temp: CPUBurn for ~10 mins.
°C Rise: Temperature rise above ambient (20°C) at load.
°C/W: based on the amount of heat dissipated by the CPU (measured
78W); lower is better. |
Overall the Megahalems was a very impressive performer, delivering some of
the best results we've ever seen. Both fans kept thermal rise above ambient
below 20°C, even at 5V. The provided fan's sweet spot seemed to be 7V, while
our reference Nexus fan performed proportionally depending on the fan voltage.
The Nexus fan delivered slightly improved results at equivalent noise levels,
but only by a single degree on average — nothing to write home about.
|
°C rise Comparison: Prolimatech Megahalems vs.
Competitors
|
|
Heatsink
|
Nexus 120 fan voltage / SPL @1m
|
|
12V
|
9V
|
7V
|
5V
|
|
16 dBA
|
13 dBA
|
12 dBA
|
11 dBA
|
|
Scythe Ninja 2
|
17
|
18
|
20
|
23
|
|
Xigmatek HDT-S1283
|
13
|
15
|
18
|
22
|
|
Thermalright U120E
|
12
|
14
|
17
|
24
|
|
Noctua NH-U12P
|
14
|
16
|
17
|
21
|
|
Thermalright HR-01+
|
13
|
15
|
16
|
20
|
|
Prolimatech Megahalems
|
10
|
14
|
17
|
20
|
|
All results generated with our reference Nexus 120mm
fan.
|
The Prolimatech Megahalems's performance was top-notch across the board. It
posted similar results to the Thermalright
HR-01 Plus and Noctua NH-U12P
with low airflow, and bested the entire field, even the Thermalright
Ultra-120 eXtreme, when our Nexus fan was set to 12V.
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