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The HR-01 Plus shares the same base and heatpipe design as the
Ultra-120/eXtreme series. The fins are the main difference. Dimensions and weight differences (600g vs. 745g and 790g
respectively for the Ultra-120/ eXtreme) all stem from the differences in the fins.
HR-01 Plus on the left, Ultra-120 on the right. The Ultra-120
eXtreme looks the same as the U120, but it features six heatpipes, like the HR-01.
HR-01 Plus on top has slightly more square dimensioned fins than the Ultra-120 series heatsinks.
Compared to the Ultra-120/eXtreme, the HR-01 Plus is narrower,
slightly taller, and has much greater spacing between the fins. We measured the fins as
approximately 0.45mm thick with a 3.15mm gap between. Though the Ultra-120
eXtreme is the current champ, it suffers with low airflow (read: a quiet fan at minimal speed) due to its tight
fin spacing. Its design allows for more fins and thus greater cooling surface
area but when the fan is slowed way down, the tight fin spacing impedes airflow, making
passive operation impossible.
The "High Riser."
"HR" stand for "High Riser" and it's clear where
they got this moniker. The HR-01 Plus resembles a futuristic
condominium. The heatpipes are jammed together quite tightly, so they are
staggered at the bottom on each side to create some separation.
As with almost all tower heatpipe heatsinks, the U-shape of the heatpipes with the base at the bottom of the U makes each heatpipe in the HR-01 Plus act like two: There are 12 thermal paths between evaporation and condensation through the six heatpipes.
From the side.
The fin spacing is not as wide as on the Scythe Ninja. The fins also thicker and more solidly attached,
making them less likely to be damaged. Our original
Ninja sample had fins bent every which way when it was retired from service.
The stability of each layer of fins is due in part to the "through hole"
design. At the center of each level, a series of holes are punched upward,
creating a series of flaps which prop up the layer above it. These holes also provide additional airflow paths through the heatsink.
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