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Cooler
Master Geminii S - $35USD
We wouldn't call the Geminii S a compact cooler, but it is smaller
than the NT06-E with a fan. It is also short enough to fit in some cases that
most third party heatsinks will not (such as the Luxa2
LM100).
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The Geminii S and included accessories.
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At 86 mm tall and weighing in at 500 grams, it isn't exactly
a light weight. Its shape is reminiscent of the formidable Noctua
NH-12CP. It sports 5 heatpipes and ships with a 120 mm fan. The
fins are extremely thin at 0.28 mm, and are spaced 1.6 mm apart on average.
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To mount the Geminii S, bolts are screwed tight into the mounting
arms before they are installed. The threads on the bolts are reversed,
that is they are tightened by turning counterclockwise.
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The bolts are secured to a backplate on the other side with nuts.
The nuts tighten in the traditional way (clockwise), so the nuts and bolts
will never get stuck together and rotate together if one side becomes
loose.
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Mounted on our test platform.
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Test Results (stock fan)
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Fan Voltage
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Fan Speed
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SPL@1m
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Thermal Rise
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°C/W
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12V
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1930 RPM
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30 dBA
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16°C
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0.21
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9V
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1530 RPM
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24 dBA
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18°C
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0.23
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7V
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1200 RPM
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20 dBA
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21°C
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0.27
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5V
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800 RPM
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14 dBA
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29°C
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0.37
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Test Results (reference fan)
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12V
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1100 RPM
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16 dBA
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21°C
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0.27
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9V
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890 RPM
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13 dBA
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25°C
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0.32
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7V
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720 RPM
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12 dBA
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32°C
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0.40
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Thermal Rise: Temperature rise above ambient
at load.
°C/W: based on the amount of heat dissipated by the CPU (measured
78W); lower is better.
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The fan included with the Geminii S was surprisingly good, rivaling the acoustic
qualities of Scythe and Nexus fans. At 12V and 9V, it was turbulent but smooth.
At 7V it developed a bit of a buzz that was only audible close-up, but sounded
completely benign at 1m. At 5V it was inaudible.
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