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
Thermalright	Ultra-90	high	19.6	13.0	56.2
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
Cooljag	Falcon 92-AL	high	23.2	14.2	52.1
Akasa	AK-920	high	24.3	14.1	52.9
Akasa	AK-922 (EVObue)	high	25.5	15.4	60.3
Cooljag	Falcon 92-AL	low	27.6	17.2	30.8
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
			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 Cooljag Falcon 92-AL heatsink maintains a temperature of just 23.2°C over ambient (with 52.1dBA noise). For a heatsink we were initially unsure about, that is a very positive result. In fact that puts the Falcon 92-AL heatsink in the top 10.

When the speed of the 92mm PWM fan speed is reduced to about 1200RPM the sound output falls to 30.8 dBA, but surprisingly the temperature increases only to 27.6°C over ambient. This is an excellent temperature result for a heatsink that is running near whisper quiet.

The Cooljag Falcon 92-AL heatsink was also tested with an 85W heat load. In this case it held steady with a low 14.2°C temperature over ambient at full fan speed. As fan speed was reduced to 1200RPM, the Falcon 92-AL maintained a rise above ambient temperature of just 17.2°C.

When the Cooljag Falcon 92-AL heatsink is running at full tilt it is an excellent heatsink for LGA775 Intel and K8 AMD processor platforms. On the Intel synthetic test platform in particular, this Cooljag heatsink exhibited very enticing results, maintaining some of the lowest temperatures for a heatsink in the 31 dBA range (at low fan speed) in fact. Overall the Falcon 92-AL heatsink is a bit bulky, but there is no getting around the thermal results we've seen here. It's not the absolute best heatsink every, but it offers an excellent mix of low temperatures and noise levels.

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