Synthetic Temperature Test Results: *Ranked according to 100W small interface die test results.

FrostyTech Synthetic Temperature Test Platform Results
Mfg.	Model	Ambient Temp.	27mm large copper block	15mm small copper block		27mm large copper block	15mm small copper block	Thermal pad	No. Fans	Fan Noise	Clip force
			50W	50W		100W	100W
Thermalright	SLK800	21.7	34.8	37.5		45.2	51.6	none	1	loud	med
Thermalright	AX-7	21.7	34.8	37.1		46.1	52.1	none	1	loud	med
Tocools	Novasonic	22.9	40.9	39.9		54.4	59.4	none	1	med	stiff
Globalwin	CAK4-86	25.7	36.6	44.3		47.0	60.6	none	1	high	eacy
Coolink	U1P2	26.1	39.4	44.9		50.9	62.2	none	2	loud	easy
Arkua	628	23.9	42.7	42.1		58.9	62.3	none	1	med	med
Thermal Integration	TI-V77L	26.5	39.1	44.4		57.5	63.6	grey	1	med	med
Sibak	AC02625B	23.2	41.3	59.0		43.2	64.7	none	1	loud	med
Coolink	U2P	27.1	40.6	47.6		55.3	67.6	none	1	loud	easy
Sibak	AC06725TH	22.5	42.9	46.2		61.7	67.7	none	1	Very loud	med
Globalwin	CAK4-88T	26.1	43.9	50.4		54.5	68.1	none	1	quiet	easy
Coolermaster	HHC-001	21.7	40.0	44.8		56.3	68.1	none	1	loud	easy
Globalwin	CAK4-76T	26.1	42.5	49.3		55.2	68.7	none	1	med	easy
Dynatron	DY1206BH-625	23.2	40.0	55.1		47.6	70.4	none	1	loud	stiff
Coolink	H2T	27.1	44.5	49.0		60.8	70.9	none	1	med	easy
Coolink	U1L2	26.1	42.3	51.1		57.9	72.2	none	2	med	easy
Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
Coolermaster	HSC-V62	21.4	47.4	52.8		61.7	74.5	none	1	quiet	easy
NengTyi	XPC5000	23.9	46.5	49.1		69.1	76.1	none	1	med	med
Coolink	U2L	27.1	45.6	52.6		62.7	76.2	none	1	med	easy
Spire	5F263	22.6	44.7	51.8		64.3	76.2	white	1	low	med
Titan	TTC-CU5TB	24.2	46.2	51.2		61.8	76.4	none	1	loud	stiff
Taisol	CGK760092	23.4	42.7	51.3		61.2	77.5	pink	1	low	med
Spire	5T235	22.3	43.0	50.3		62.8	78.1	white	1	med	med
Zalman	CNPS6000-Cu	24.8	46.4	53.8		65.6	78.2	none	1	very low	easy
AVC	112AM1	24.8	46.6	52.9		70.1	79.6	none	1	low	stiff
Coolink	H1T	27.1	49.2	53.6		69.4	79.9	none	1	med	easy
Sibak	AE01625B	23.5	40.8	54.4		57.1	81.0	none	1	loud	easy
Coolermaster	HHC-L61	21.5	47.2	48.3		71.2	82.3	none	1	quiet	easy
Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
JMC Products	400023	23.1	44.5	65.2		55.3	85.2	Chomerics T725	1	low	easy
Sibak	AT01515B	23.0	45.1	64.6		60.1	95.2	none	2	med	stiff
Verax	P11T	26.1	61.2	69.7		90.9	102.7	none	1	none	easy
Verax	P14	26.1	56.9	67.4		81.6	101.2	none	1	none	easy
			50W	50W		100W	100W

Performance is a little higher than we initially expected with this fan, but the copper skive base seems to be helping out to keep the numbers pretty low. We'll have to wait and see what the results are with the final rise above ambient temperatures before we find out where the CAK4-76T stands.

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block	15mm small copper block		27mm large copper block	15mm small copper block
		50W	50W		100W	100W
Thermalright	SLK800	13.1	15.8		23.5	29.9
Thermalright	AX-7	13.1	15.4		24.4	30.4
Globalwin	CAK4-86	10.9	18.6		21.3	34.9
Coolink	U1P2	13.3	19.8		26.8	36.1
Tocools	Novasonic	18.0	17.0		31.5	36.5
Thermal Integration	TI-V77L	12.6	17.9		31.0	37.1
Arkua	628	18.8	18.2		35.0	38.4
Coolink	U2P	13.5	20.5		28.2	40.5
Sibak	AC02625B	18.1	35.8		20.0	41.5
Globalwin	CAK4-88T	17.8	24.3		28.4	42.0
Globalwin	CAK4-76T	16.4	23.2		29.1	42.6
Coolink	H2T	17.4	21.9		33.7	43.8
Sibak	AC06725TH	20.4	23.7		39.2	45.2
Vantec	CCK-6027D	18.0	22.2		37.5	46.0
Coolink	U1L2	16.2	25.0		31.8	46.1
Coolermaster	HHC-001	18.3	23.1		34.3	46.4
Dynatron	DY1206BH-625	16.8	31.9		24.4	47.2
Coolink	U2L	18.5	25.5		35.6	48.9
NengTyi	XPC5000	22.6	25.2		45.2	52.2
Titan	TTC-CU5TB	22.0	27.0		37.6	52.2
Coolink	H1T	22.1	26.5		42.3	52.8
Coolermaster	HSC-V62	26.0	31.4		40.3	53.1
Zalman	CNPS6000-Cu	21.6	29.0		40.8	53.4
Spire	5F263	22.1	29.2		41.7	53.6
Taisol	CGK760092	19.3	37.8		27.9	54.1
AVC	112AM1	21.8	28.1		45.3	54.8
Spire	5T235	20.7	28.0		40.5	55.8
Sibak	AE01625B	17.3	30.9		33.6	57.5
Thermaltake	Volcano 6cu+	13.8	28.8		32.1	57.9
Coolermaster	HHC-L61	25.7	26.8		49.7	60.8
JMC Products	400023	21.3	42.0		32.1	62.0
Sibak	AT01515B	22.1	41.6		37.1	72.2
Verax	P11T	35.1	43.6		64.8	76.6
Verax	P14	30.8	41.3		55.5	75.1
		50W	50W		100W	100W

The final results place the Globalwin CAK4-76T very close to that of the CAK4-88T which also features a thermally controlled fan - albeit on a little larger than this cooler. I would say that the race to produce the best overall low-noise heatsink is fully on. Thermally controlled fans such as this are an effective measure, but they are still somewhat of a stopgap between older cooling technologies and the requirements for the future.

The basic impingement heatsink has changed little since the days of the 486, though things have gotten larger, copper is used more and more, and a fin densities have been increased. If we are to see further advancements in both cooling capabilities and acoustic sensitivity then manufactures will have to continue to adopt and test out new techniques, and technologies. In the mean time, if you have an AMD system you'd like to see just a little quieter, and don't fool around with overclocking then the Globalwin CAK4-76T may be just your ticket.

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