FrostyTech.com Mk.II Synthetic Thermal Heatsink Test Results Results based on readings from a 38x38mm copper interface die with 125W heat load on the Mk.II Test Platform. Thermal Test values for each heatsink were calculated by determining the rise over ambient temperature at time of test. Information on Frostytech's test methodology is available here. Socket 939/940/754 compatible CPU heatsinks
manufacturer:	model no.:	*fan speed:	125w thermal test (°c)	noise level (dba)
Gigabyte	G-Power Pro	high	18.6	71.9
Coolermaster	Hyper6	high	20.5	54.7
Thermaltake	Venus 12	high	21.7	68.1
ASUS	Starice	high	22.8	67.4
Coolermaster	Aquagate Mini	high	23.2	59.2
Thermaltake	Polo 735	high	23.4	68.0
Cooljag	SFO-H	high	23.6	60.6
Alpha	PAL-8150		23.7	58.9
Zalman	CNPS9500LED (clip parallel)	high	23.8	50.3
AVC	Z7U3301001 (stock 939)	high	24.6	59.9
Gigabyte	3D Cooler-Ultra	high	24.8	63.0
Scythe	Shogun	high	26.0	45.9
EKL	V8	high	26.3	57.5
Arctic Cooling	Freezer 64 Pro		26.9	50.9
Gigabyte	3D Rocket-Pro	high	26.9	56.7
Gigabyte	3D Cooler-Pro	high	27.0	62.5
Gigabyte	3D-Rocket		28.9	50.7
Vantec	Mach1	high	29.2	56.9
CoolJag	SFO-D(18SC)		29.6	64.0
Zalman	CNPS7000A-Cu	high	30.3	45.2
Dynatron	SK-V24		30.3	56.4
Verax	Quattro 1	high	30.7	55.4
Zalman	CNPS7000-Cu	high	31.0	45.2
Coolermaster	Hyper48		31.7	43.6
Scythe	Kama SCKK1000		31.9	47.5
Scythe	Samurai SCSM1000	high	32.1	51.6
Zalman	CNPS7000B-CU	high	32.3	44.9
Thermaltake	Silentboost K8		32.3	49.7
AVC	Z7U3301001 (stock 939)	low	32.6	44.2
Jetart	JAX801		33.2	53.5
Dynatron	A22		34.5	44.5
nPowertek	NPH K8-1		34.6	52.2
Ajigo	MF043-044 (stock 754)		35.0	45.4
Arctic Cooling	Silencer 64 Ultra TC		37.5	55.5
Gigabyte	NeonCooler 8-BL		37.7	42.0
Titan	TTC-K8ATB/825/SC		38.7	63.1
Evercool	K802-715		42.1	51.5
Evercool	Magic Cooler		46.6	55.5
			125w thermal test (°c)	noise level (dba)
*heatsinks are ranked according to the 125w 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.

At its highest fan speed of 5400RPM, the AVC Z7UB301 heatsink performs very well indeed. According to the thermal test results from the FrostyTech Mk.II Synthetic Test Platform which applies a 125W heat load to the heatsink, the AVC Z7UB301 maintained a rise above ambient temperature of 24.6°C at its best fan speed. The noise level was nearly 60 dBA in that case however.

When running with a more conservative fan speed, noise levels dropped to about 44 dBA and temperatures rose to a rise above ambient temp. of 32.6°C - pretty good actually. The temperature sensitive fan utilized on the AVC Z7UB301 heatsink certainly gives it the potential to be both a great performing heatsink and a lower noise one as well.

Considering these results, it is clear that AMD has provided socket 754/939/940 Athlon64 users with very capable heatsink. The AVC Z7UB301 is designed to cool only as much as necessary, which leaves us wishing there were a way to manually control the fan speed. In any case, it is comforting to note that there are quite a few third-party heatsinks which perform poorer than the AMD reference AVC Z7UB301 heatsink at its quietest, and most surprisingly with higher noise levels too.

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