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

FrostyTech Synthetic Temperature Test Platform Results
Mfg.	Model	Ambient Temp.	27mm large copper block		27mm large copper block	Thermal pad	No. Fans	Fan Noise	Clip force
			50W		100W
Thermalright (high)	SLK-900U	20.0	31.6		40.5	none	1	very loud	easy
Cooljag (high)	CJC66IC-A	23.0	53.4		44.3	none	1	loud	easy
Zalman	CNPS7000A-Cu	21.4	33.8		46.3	none	1	low	easy
Thermal Integration	TI-RV104N	21.0	35.4		46.4	none	1	loud	easy
JMC	401100	19.5	35.1		47.4	grey	1	med	easy
Zalman	CNPS7000-Cu	21.0	35.1		48.7	none	1	low	easy
Gigabyte (high)	3DCooler-pro	22.6	38.2		49.2	none	1	very loud	easy
Coolermaster (high)	Jet4	22.2	34.8		50.3	none	1	very loud	hard
Taisol	CCP445172	20.2	37.7		50.9	none	1	med	easy
AVC	117140	22.6	37.8		50.4	none	1	med	med
Coolermaster	IHC-H71	23.0	37.0		51.1	none	1	loud	stiff
Thermal Integration	TI-RV108N	19.5	35.4		51.2	none	1	med	easy
Arkua	8568	22.4	37.8		51.7	none	1	med	med
Jetart	JAP416A	23.1	34.9		52.2	none	1	loud	easy
Zalman	CNPS7000A-Cu	25.9	39.2		52.5	none	1	low	easy
Thermal Integration	TI-A8736N	23.5	35.9		52.6	none	1	loud	easy
Thermal Integration (high)	TI-V7035TN	20.2	38.3		52.9	none	1	very loud	easy
Dynatron	DC1206BMY	19.5	38.1		53.1	none	1	med	easy
Dynatron	DC1207BMX	20.9	38.1		53.3	none	1	med	easy
Taisol	CEP447181	24.8	39.4		53.5	white	1	med	easy
Jetart	JAP407A	23.7	37.5		53.9	none	1	loud	easy
Alpha	PAL8942	27.9	42.6		54.0	none	1	med	med
Intel	Stock 3.06GHz	24.9	39.9		55.0	none	1	med	easy
Coolermaster (low)	Jet4	22.2	38.8		55.4	none	1	med	hard
Arkua	Q85X-7J	24.6	41.3		56.5	none	1	med	easy
CoolJag	JVC661A	23.2	40.5		56.7	none	1	med	easy
Spire	SP411C5	25.2	42.5		56.9	white	1	loud	easy
Zalman	CNPS6500-AlCu	23.1	40.3		57.4	none	1	low	easy
TS Heatronics (6" fan dist)	NCU-1000	23.9	39.5		57.5	none	0	N/A	med
Taisol	CEP426151A	24.3	43.7		59.7	none	1	med	easy
Intel	Socket 478	22.4	41.8		59.8	carbon	1	low	med
Arkua	838T-7G	23.3	42.0		60.0	none	1	med	easy
Titan	CW9TB/SC	22.5	41.4		60.8	none	1	loud	easy
Dynatron	DC1207BMW	23.2	42.7		61.1	none	1	med	easy
Arkua	8456X-8T	25.1	43.7		61.4	none	1	low	easy
Spire	SP420B8	25.3	42.7		61.5	none	1	low	easy
Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
AVC	117160	22.4	42.7		62.2	white pad	1	med	med
Evercool	NW9F715CA	23.8	42.9		62.3	none	1	med	easy
Aopen	ACP4LC	24.1	42.0		62.9	grey pad	1	med	easy
Scythe	Kamakaze	26.1	44.0		63.0	none	1	med	hard
Evercool	CUW8-715	23.0	44.8		63.8	none	1	med	easy
Zalman	CNPS5700D-Cu	25.7	44.6		64.0	none	1	med	easy
Globalwin	VA476	28.7	49.5		68.0	grey	1	med	easy
Arctic Cooling	SuperSilent4 Pro	25.1	46.8		68.1	none	1	low	stiff
Dynatron	DC1206BMV	23.1	45.1		68.2	none	1	low	easy
Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
Verax	P16	21.8	49.2		75.8	none	1	none	med
Arkua	848X-6B	27.2	54.5		80.4	none	1	low	med
Dynatron	DC1U-B02	20.9	53.8		88.3	none	1	loud	stiff
			50W		100W

The Evercool CUW8-715 is a moderate sized copper heatsink, and doesn't rank too well in the initial thermal results. Let's have a look at where temperatures stand in the final rise above ambient results table next.

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
Thermalright (high)	SLK-900U	11.6		20.5
Cooljag (high)	CJC66IC-A	10.4		21.3
Zalman	CNPS7000A-Cu	12.4		24.9
Thermal Integration	TI-RV104N	14.4		25.4
Alpha	PAL8942	14.7		26.1
Gigabyte (high)	3DCooler-pro	15.6		26.6
Zalman	CNPS7000-Cu	14.1		27.7
AVC	117140	15.2		27.8
JMC	401100	15.6		27.9
Coolermaster (high)	Jet4	12.6		28.1
Coolermaster	IHC-H71	14.0		28.1
Taisol	CEP447181	14.6		28.7
Jetart	JAP416A	11.8		29.1
Thermal Integration	TI-A8736N	12.4		29.1
Arkua	8568	15.4		29.3
Intel	Stock 3.06GHz	15.0		30.1
Jetart	JAP407A	13.8		30.2
Taisol	CCP445172	17.5		30.7
Thermal Integration	TI-RV108N	15.9		31.7
Spire	SP411C5	17.3		31.7
Arkua	Q85X-7J	16.7		31.9
Dynatron	DC1207BMX	17.2		32.4
Thermal Integration (high)	TI-V7035TN	18.1		32.7
Coolermaster (low)	Jet4	16.6		33.2
Cooljag	JVC661A	17.3		33.5
TS Heatronics (6" fan dist)	NCU-1000	15.6		33.6
Dynatron	DC1206BMY	18.6		33.6
Scythe	Kamakaze	18.9		34.1
Zalman	CNPS6500-AlCu	17.2		34.3
Taisol	CEP426151A	19.4		35.4
Spire	SP420B8	17.4		36.2
Arkua	8456X-8T	18.6		36.3
Arkua	838T-7G	18.7		36.7
Intel	Socket 478	19.4		37.4
Dynatron	DC1207BMW	19.5		37.9
Zalman	CNPS5700D-Cu	18.9		38.3
Titan	CW9TB/SC	18.9		38.3
Evercool	NW9F715CA	19.1		38.5
Aopen	ACP4LC	17.9		38.8
Globalwin	VA476	20.8		39.3
Dynatron	DC1206BM-S	20.8		39.6
AVC	117160	20.3		39.8
Evercool	CUW8-715	21.8		40.8
Arctic Cooling	SuperSilent4 Pro	21.7		43.0
Dynatron	DC1206BMV	22.0		45.1
Vantec	GSN-7105	25.1		46.6
Arkua	848X-6B	27.3		53.2
Verax	P16	27.4		54.0
Dynatron	DC1U-B02	32.9		67.4
		50W		100W

Well.... it seems as though the Evercool CUW8-715 isn't much of a Pentium 4 heatsink, in spite of all that copper. With a relatively small copper base to absorb and spread all the heat from the P4 heatspreader through to the copper fins, something is definitely amiss.

The thermal results speak for themselves pretty clearly here. Compared to the stock Intel heatsink, both aluminum and copper-based coolers, the CUW8-715 doesn't have what it takes. As a socket A heatsink (CUF-715 ) the Evercool CUW8-715 was much better, and it is clear from these thermal test results that the design has been adapted to fulfill a role that it doesn't handle with much grace.

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