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Rosewill RCX-Z2 Heatsink Review
Rosewill RCX-Z2 Heatsink Review
  87%   
Abstract: When the Rosewill RCX-Z2 heatsink is used with a motherboard that does not support PWM, the fan rotates at full speed. At full tilt (3400RPM) the heatsink produces 59 dBA noise.

 Manufacturer  Category  Published  Author 
Rosewill   Cooling / Heatsinks   Feb 25, 2007   Max Page  

Home > Reviews > Page: Intel LGA775 Heatsink Temperature Comparisons

FrostyTech Mk.II Synthetic Thermal Heatsink Test Results
Intel Pentium D / Extreme Edition & Quad Core class heatsinks tested at 150W
Intel Core 2 Duo / Pentium 4 / Celeron class heatsinks tested at 85W

Results based on readings from a 30x30mm copper interface die with 150W and 85W heat loads applied on the LGA775 version of the Mk.II Test Platform. Temperature results listed for each heatsink were calculated by determining the rise over ambient temperatures at time of test. Information on Frostytech's test methodology is available here.
Socket 775 compatible CPU heatsinks
manufacturer: model no.: fan speed: 150w
thermal test* (°c)
85w
thermal test (°c)
noise level (dba)

Thermalright Ultra 120 17.8 10.6 53.7
Zalman CNPS9700 LED high 19.0 10.4

56.5

Enzotech Ultra-X high 20.0 8.5 59.1
Apack Zerotherm BTF90 21.8 12.7 52.1
Apack Zerotherm BTF80 22.8 13.9 51.9
Akasa AK-920 high 24.3 14.1 52.9
Thermalfly F1-IACSHA high 29.0 18.3 60.4
Thermalfly I75DUB high 29.5

16.8

68.5
Zalman CNPS9500 AT 29.6 17.3 53.3
Alpha Novatech PRE9060M92P high 29.9 18.5 51.5
Akasa AK-961 30.0 18.7

60.7

nPowertek NPH-775-1 30.1 18.8 50.1
Sunon Waturbo 30.6 18.3 57.5
Apack CF800 high 31.4 20.7 48.4
Thermaltake Jungle512 high 31.6 20.4 60.8
Xigmatek AIO-S80DP high 32.4 21.4 55.0
Rosewill RCX-Z2

32.6

19.3 59.9
Zalman CNPS7700-Cu high 32.9 19.7 50.7
Apack CF900 high 32.9 20.3 48.3
Evercool PT02-9232CP 33.3 19.9 63.3
Zalman CNPS7700-Cu LED high 33.5 20.6 49.8
Intel Stock Pentium D high 33.8 20.7 47.5
nPowerTek SF775-2 high 34.7 21.1 64.6
Akasa AK-960E 36.1 21.4 56.3
Thermalfly I75DUH 37.8 22.8 48.7
Cooljag OAK-H high 38.5 22.9 55.7
Cooljag OAK-H2 high 38.6 24.1 55.6
LS Cable SHS-T700 38.7 22.8 48.5
Intel Stock Pentium D low 40.3 23.9 40.5
Cooljag OAK-H low 95.3 54.5 29.5
150w
thermal test (°c)
85w
thermal test (°c)
noise level (dba)
*heatsinks are ranked according to the 150w thermal test results column (rise over ambient temp.). low temperatures with low noise levels are considered best. for reference heatsinks with variable-speed fans, only the high speed (12v) fan test result is included in the comparison sheet; more detailed results reside in each specific heatsink review.

With a 150W heat load applied by the Intel LGA775 synthetic thermal test platform, the Rosewill RCX-Z2 heatsink achieves a very nice rise above ambient temperature of 32.6°C. The heatsink's 90mm fan was spinning at 3400RPM during these tests, and so noise levels were in the 59.9 dBA range - which is a little loud. A heat load of 150W is roughly approximate to a stressed Intel Pentium D / Extreme Edition or Core 2 Quad class processor. Compared to the stock Intel Pentium D heatsink listed in the above chart, the Rosewill RCX-Z2 was about the same in terms of temperature.

The Rosewill RCX-Z2 heatsink was next tested with an 85W heat load, and under those condition it maintained a temperature of 19.3°C rise over ambient.

One of the side benefits to a heatsink structure like this, with an open fan and widely spaced cooling fins, is that exhaust air is directed right at components outside the CPU socket. Critical items like the Northbridge, voltage regulating MOSFETs, and memory can all reach elevated temperatures if there is insufficient airflow to cool things down.

The Rosewill RCX-Z2 heatsink can certainly operate satisfactorily at its stock speed setting. Looking at the results list for the 150W test, when the 90mm fan on the Rosewill RCX-Z2 heatsink spins at full speed it is as good as the Intel solution, although significantly louder which is unfortunate.

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 Previous Page ° Heat Sink Review Index  

Table of Contents:

 1:  Rosewill RCX-Z2 Heatsink Review
 2:  360° View - Rosewill RCX-Z2 Heatsink
 3:  Acoustic Comparisons and Base Surface Quality
 4: — Intel LGA775 Heatsink Temperature Comparisons

List all Rosewill heat sinks that Frostytech tested?

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