[Socket 478] 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
Alpha	PAL8942	14.7		26.1
Zalman	CNPS7000-Cu	14.1		27.7
AVC	117140	15.2		27.8
JMC	401100	15.6		27.9
Coolermaster	IHC-H71	14.0		28.1
Taisol	CEP447181	14.6		28.7
Jetart	JAP416A	11.8		29.1
Arkua	8568	15.4		29.3
Intel	Stock 3.06GHz	15.0		30.1
Jetart	JAP407A	13.8		30.2
Spire	SP411C5	17.3		31.7
Taisol	CCP445172	17.5		30.7
Arkua	Q85X-7J	16.7		31.9
Dynatron	DC1207BMX	17.2		32.4
Thermal Integration (high)	TI-V7035TN	18.1		32.7
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
Scythe	Kamakaze	17.9		36.9
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
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

First off, I should let you know that the Thermalright SLK-900U in this list of reference heatsinks was tested with a high speed Delta fan that produced over 67 dBA or noise. The Zalman heatsink on the other hand, while only coming in about 4 degrees Celsius warmer, produced just 42 dBA of sound.

Quite the difference, and quite the reason why this Zalman heatsink has become so popular with folks looking for a little extra cooling performance without the added noise of a high-speed fan.

On the Pentium 4 platform the Zalman CNPS7000A-Cu is best suited. The standard HSRM which Intel employs makes it universally acceptable for all P4 motherboards, and the clipping system is pretty easy to use as it doesn't require the motherboard to be removed for installation.

The only problem that may occur is if the AGP and processor sockets are located too close together. A list of non-compatible motherboards is on Zalman's site, but most of the models are value-oriented boards you are unlikely to want to have in your PC anyway.

The CNPS7000A-Cu is also compatible with the new AMD Athlon64 Socket 754/940 processors, but we don't yet have our new synthetic temperature test platform built for testing K8 heatsinks. Look to FrostyTech.com in the near future for a whole series of K8 heatsink reviews.

Ultimately the Zalman  CNPS7000A-Cu is a very good performing SocketA/Socket 478 heatsink as you have seen by the test results above. It manages to cool with great efficiency, as evidenced by the nice low noise levels. Furthermore, with the aide of the Fanmate 1, the speed of the large fan can be further adjusted for even quieter operation. Temperatures will rise if you turn the fan speed down too far, but even under normal operation the heatsink offers very compelling value for the price. Bottom line; the Zalman CNPS7000A-Cu is easily recommended for performance cooling, low noise cooling, or just a bit of both.

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