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Rosewill RCX-Z2-EX Heatsink Review
Rosewill RCX-Z2-EX Heatsink Review
  82%   
Abstract: The Rosewill RCX-Z2-EX is pegged as a low noise heatsink, and with its PWM fan able to scale between 800-2400RPM this is quite an asset.

 Manufacturer  Category  Published  Author 
Rosewill   Cooling / Heatsinks   Feb 26, 2007   Max Page  

Home > Reviews > Page: Intel 775 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

Rosewill RCX-Z2-EX high 30.1 18.7 45.9
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
Rosewill RCX-Z2-EX low 51.7 30.5 35.4
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.

Intel processors vary widely in heat output between single and multi-core processors, so we rely on two values which represent the upper limit of both existing CPU families to test thermal solutions. With a 150W heat load applied by the Intel LGA775 version of FrostyTech's synthetic thermal test platform, the Rosewill RCX-Z2-EX heatsink yields a rise above ambient temperature of 30.1°C, with 45.9dBA noise. This is of course with the 92mm fan spinning away at its full speed of 2400RPM.

When fan speed is dropped down to 800RPM, the temperature on the 150W test die rises to 51.7°C over ambient, which is satisfactory and not particularly impressive. Noise levels fall to a whisper quiet 35.4 dBA.

The Rosewill RCX-Z2-EX heatsink was also tested with an 85W heat load. In this situation at stock fan speeds the heatsink maintains a good 18.7°C result over ambient temperature. When the fan is again dialed down to 800RPM, the Rosewill RCX-Z2-EX reacts in a predictable manner and the synthetic CPU die temperature increases to 30.5°C over ambient.

Taking into consideration the AMD and Intel test platform thermal results, it's pretty clear that the Rosewill RCX-Z2-EX heatsink is an effective model when its fan is spinning away at the full 2400RPM. At the ultra low fan speed of 800RPM, which is very quiet, thermal performance suffers enough to bring the heatsink down a peg or two. Thus, we'd recommend using the Rosewill RCX-Z2-EX heatsink on either CPU platform at its top fan speed, or very close to that for the best thermal results. On the plus side, even at full speed the heatsink remains remarkably quiet under power.

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 Previous Page ° Heat Sink Review Index  

Table of Contents:

 1:  Rosewill RCX-Z2-EX Heatsink Review
 2:  360° View - Rosewill RCX-Z2-EX Heatsink
 3:  Acoustic Comparisons and Base Surface Quality
 4:  AMD K8 Heatsink Temperature Comparisons
 5: — Intel 775 Heatsink Temperature Comparisons

List all Rosewill heat sinks that Frostytech tested?

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