Acoustic Samples: Listen to this Heatsink

The CNPS6500-AlCu comes with the Zalman Fanmate 1 which allows users to control how fast the 92mm fan rotates, and thus how noisy it is.The first recording is a standard 10 sec bit with the fan connected directly to the power supply. The second recording is of the fan connected via the Fanmate 1, and also illustrates what happens when you turn the dial down so the fan makes less noise.

FrostyTech Acoustic Sampling Chamber (~10 sec)
Standard Waveform view. (Listen to an MP3 recording of this heatsink by clicking on the headphones)

You can see the effect visually in the second wave form image, or you can click on the pair of headphones and listen in to each recording separately.

Hi to Low Fan Speed Acoustic Sampling Chamber (~10 sec)
Standard Waveform view.

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
1	AVC	117140	22.6	37.8		50.4	none	1	med	med
2	Arkua	8568	22.4	37.8		51.7	none	1	med	med
3	Zalman	CNPS6500-AlCu	23.1	40.3		57.4	none	1	low	easy
4	Vantec	GSN-7025	22.5	41.7		58.5	none	1	med	med
5	Chauh Choung	DTA-478	22.4	42.1		59.0	carbon	1	low	med
6	Intel	Socket 478	22.4	41.8		59.8	carbon	1	low	med
7	Titan	TTC-MT3AB	22.8	41.5		61.2	none	2	loud	stiff
8	Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
9	AVC	117160	22.4	42.7		62.2	white pad	1	med	med
10	Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
				50W		100W

Even for just an aluminum heatsink, the CNPS6500-AlCu has done remarkably well in this first set of test results.

With an average temp of about 2 degrees lower than the reference Intel heatsink, the Zalman CNPS6500-AlCu also boasts a much lower noise signature and very good cooling characteristics for its class.

Rise Above Ambient Temp. (c)
	Mfg.	Model	27mm large copper block		27mm large copper block
			50W		100W
1	AVC	117140	15.2		27.8
2	Arkua	8568	15.4		29.3
3	Zalman	CNPS6500-AlCu	17.2		34.3
4	Vantec	GSN-7025	19.2		36.0
5	chauh Choung	DTA-478	19.7		36.6
6	Intel	Socket 478	19.4		37.4
7	Titan	TTC-MT3AB	18.7		38.4
8	Dynatron	DC1206BM-S	20.8		39.6
9	AVC	117160	20.3		39.8
10	Vantec	GSN-7105	25.1		46.6
			50W		100W

Zalman have really created a very high quality low noise heatsink that performs above the grade. After looking at these numbers, the step up to the CNPS6500Cu is sure to be even more impressive.