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
3Rsystem	Iceage 120	high	18.2	12.1	47.9
Apack	Zerotherm BTF92 OC Ed	high	19.0	11.2	53.6
Zalman	CNPS9700 LED	high	19.0	10.4	56.5
Scythe	Infinity SCINF-1000		19.4	10.7	37.8
Tuniq	Tower 120	high	19.6	12.2	51.6
Thermalright	Ultra-90	high	19.6	13.0	56.2
Enzotech	Ultra-X	high	20.0	8.5	59.1
Noctua	NH-U12P	high	21.3	13.4	40.7
Apack	Zerotherm BTF90		21.8	12.7	52.1
Xigmatek	HDT-S963	high	21.9	13.7	50.2
Akasa	AK-965	high	22.2	13.8	48.1
Apack	Zerotherm BTF80		22.8	13.9	51.9
Cooljag	Falcon 92-AL	high	23.2	14.2	52.1
Rosewill	RCX-Z3	high	23.3	14.0	58.6
Noctua	NH-U12P (black speed reducer)	low	23.4	14.8	34.6
Coolink	Silentator	high	23.5	16.4	41.2
Scythe	Mine Rev. B		23.6	15.0	36.8
Cooljag	Falcon 92-Cu	high	23.6	14.8	52.8
Akasa	AK-920	high	24.3	14.1	52.9
Asus	Arctic Square	high	24.9	14.9	44.9
Noctua	NH-U12P (blue speed reducer)	low	25.3	14.9	32.1
Akasa	AK-922 (EVObue)	high	25.5	15.4	60.3
Coolermaster	Aquagate Mini R80	high	25.7	16.2	59.2
Auras	SLC-747	high	27.9	25.7	52.2
Scythe	Andy Samuri Master SCASM-1000		28.4	15.1	38.4
Thermalfly	F1-IACSHA	high	29.0	18.3	60.4
nPowertek	TTIC NPH1000		29.3	16.8	47.5
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
Scythe	Kama Cross		30.0	18.8	40.0
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
Coolage	Frozen Orb F0-Z924AL	high	32.0	19.9	48.9
Xigmatek	AIO-S80DP	high	32.4	21.4	55.0
Scythe	Katana II		32.5	18.6	37.9
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
Zalman	CNPS7500-Cu LED	high	36.4	22.9	50.9
Thermalfly	I75DUH		37.8	22.8	48.7
Akasa	AK-975CU	high	38.4	23.0	47.7
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 Core 2 Duo		49.2	29.0	36.7
Glacialtech	Igloo 5062 Cu Light		50.6	29.7	45.2
Glacialtech	Igloo 5057 E		58.5	36.1	53.4
Spire	Fourier IV SP607B3-C		63.6	18.7	60.2
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 in power output between single and multi-core models, so frostytech tests heatsinks with two thermal loads that represent the upper limit of each cpu family, 150w and 85w. with a 150w heat load applied by the intel lga775 version of frostytech's synthetic thermal test platform, the Noctua NH-U12P heatsink maintains a temperature of 21.3°C over ambient, with 40.7dBA noise. Noctua's NH-U12P heatsink was then tested with a 85W heat load, resulting in a low 13.4°C rise over ambient temperature.

The black fan speed reducer is up first, and as we already know it keeps noise to about 34.6dBA. At this fan speed on the 150W synthetic test platform, the Noctua NH-U12P heatsink held steady at 23.4°C over ambient. Next was the 85W head load test, where temperatures stayed at 14.8°C over ambient. For the blue fan speed reducer, the 150W and 85W tests saw temperature rise to 25.3°C and 14.9°C respectively. Noise levels remained constant at 32.1dBA.

These results reaffirm Noctua's position as a maker of great low noise heatsinks for Intel and AMD processors.

The Noctua NH-U12P heatsink in particular, with its NF-P12 fan, runs very quiet at full speed and maintains temperatures that keep it in with the top 10 AMD & Intel heatsinks.

Noctua's NH-U12P is certainly a big heatsink, and that will keep it out of a lot of compact PC chassis which could otherwise use a good quiet heatsink. That's the nature of the beast I suppose. From what we've seen here, it is possible to drastically reduce the noise output with the two supplied fan speed reducers. However, I'd stick to the black one if you find 40dBA to loud; it gives the best reduction in noise with the least impact to cooling capacity on either AMD or Intel platforms. The blue speed reducer will make things quieter, but temperatures rose by an average of 4-5°C as a result. In any case, Noctua have produced a very nice low noise heatsink here. Recommended.

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