Acoustic Samples: Listen to this Heatsink!

The waveform image shown below is out of scale for the Sibak AC02625B even though it is a noisy little guy (59.7dB). To listen to the heatsink and hear for yourself what this heatsink actually sounds like. Just click on the headphones and listen to the MP3 recording.

FrostyTech Acoustic Sampling Chamber
Standard Waveform view of a 10 second recording. Click on the headphones to listen to an MP3 recording of this heatsink in operation.

Sound Level Measurements:

Listening to the actual noise a heatsink makes allows you to hear what pure numbers alone cannot get across. To further emphasize FrostyTech's reliance on cold hard facts when evaluating a heatsink, we also take Decibel readings with a sound level meter. These results may be higher than the manufacturer's listed specs, but then again these are real world measurements.

FrostyTech Sound Level Results
-	Manufacturer	Model	Noise Level	Scale
	JMC Prducts	400023	46.6 dB	quiet
	Zalman	All Flower HSF	47.4/28.9 dB
	Taisol	CGK760092	48.4 dB
	GlacialTech	Igloo 2310	49.4 dB
	Noisecontrol	Silverado	50.8 dB
	Thermal Integration	TI-V77L	53.0 dB
	Tocools	Crown	54.5 dB
	Sibak	AT01515B	55.8 dB
	Sibak	AC02625B	59.7 dB
	Dynatron	DC1206BMP	65.1 dB	louder

This shiny little aluminum encased heatsink is a little bundle of noise and high RPM's which I'm sure a lot of you will enjoy. With a fan spinning at 7000RPM, and drawing 0.34A you can guess that things are far from "quiet" on the western front.

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
1	Thermal Integration	TI-V77L	26.5	39.1	44.4		57.5	63.6	grey	1	med	med
2	Sibak	AC02625B	23.2	41.3	59.0		43.2	64.7	none	1	loud	med
3	Swiftech	MCXC370	21.4	38.3	43.4		53.5	65.7	none	1	med	med
4	Tocools	Crown	23.2	38.8	53.2		47.9	70.2	none	1	loud	stiff
5	OCZ	Gladiator	21.4	33.3	47.3		50.6	70.3	none	1	very loud	med
6	Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
7	Swiftech	MCX370	22.3	42.0	46.1		60.3	75.6	none	1	med	hard
8	Taisol	CGK760092	23.4	42.7	61.2		51.3	77.5	pink	1	low	med
9	Zalman	CNPS6000-Cu	24.8	46.4	53.8		65.6	78.2	none	1	very low	easy
10	AVC	112AM1	24.8	46.6	52.9		70.1	79.6	none	1	low	stiff
11	GlacialTech	Igloo 2310	23.5	44.9	66.7		53.7	80.8	silver	1	med	very stiff
12	Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
13	JMC Products	400023	23.1	44.5	65.2		55.3	85.2	Chomerics T725	1	low	easy
14	Zalman	CNPS6000AlCu	24.9	48.3	56.3		72.2	86.0	none	1	low	med
15	Sibak	AT01515B	23.0	45.1	64.6		60.1	95.2	none	2	med	stiff
				50W	50W		100W	100W

Compared to the last Sibak heatsink we reviewed (the AT0151B) this is one heck of a difference, the AC02625B is in line to be one of top coolers in this list of reference heatsinks.

We'll have to look at the rise above ambient temperature results to see just how well the Sibak AC02625B performs against the Thermal Integration TI-V77L.

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
1	Thermal Integration	TI-V77L	12.6	17.9		31.0	37.1
2	Sibak	AC02625B	18.1	35.8		20.0	41.5
3	Swiftech	MCXC370	16.9	22.0		32.1	44.3
4	Vantec	CCK-6027D	18.0	22.2		37.5	46.0
5	Tocools	Crown	15.6	30.0		24.7	47.0
6	OCZ	Gladiator	12.0	26.0		29.2	49.0
7	Swiftech	MCX370	19.7	23.8		38.0	53.3
8	Zalman	CNPS6000-Cu	21.6	29.0		40.8	53.4
9	Taisol	CGK760092	19.3	37.8		27.9	54.1
10	AVC	112AM1	21.8	28.1		45.3	54.8
11	GlacialTech	Igloo 2310	21.4	43.2		30.2	57.3
12	Thermaltake	Volcano 6cu+	13.8	28.8		32.1	57.9
13	Zalman	CNPS6000AlCu	23.4	31.4		47.3	61.1
14	JMC Products	400023	21.3	42.0		32.1	62.0
15	Sibak	AT01515B	22.1	41.6		37.1	72.2
			50W	50W		100W	100W

Well the Sibak AC02625B doesn't quite have what it takes to outperform the Thermal Integration heatsink but it is a very strong contender in this list of reference heatsinks. It is also one of the loudest heatsinks here with a measured noise rating of 59.7dB.

Of course the better a heatsink performs is usually related to how fast and powerful the fan is, and with the Sibak you are looking at some very good performance numbers on the small interface die at 100W. Bottom line; a very good little noisy heatsink with a chewy copper core!