The 38mm thick Delta fan is not known for its quiet operation. Rather it is known for outputting 45CFM of air for performance cooling where noise is not the issue. This type of fan is amongst the loudest we've seen to date, and additionally if the fan is unbalanced by any small degree it can cause unwanted vibrations throughout the case.

Click on the headphones to the right of the waveform images to listen to this heatsink.

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	Dynatron	DY1206BH-638	22.5	37.3	46.3		51.5	67.4	none	1	high	med
3	Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
4	OCZ	Dominator	26.5	37.7	50.9		52.4	74.2	none	1	loud	med
5	Swiftech	MCX370-0A	22.3	42.0	46.1		60.3	75.6	none	1	med	hard
6	Akasa	Silver Mountain	26.6	46.2	51.5		65.0	76.1	none	1	loud	med
7	Vantec	CCK-6035D-Retail	26.5	44.2	52.8		63.2	77.9	none	1	loud	med
8	Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
9	Spire	5T060B1H3R	26.7	42.7	57.5		64.6	85.1	none	1	low	med
10	Thermalright	CB-6L	24.6	50.3	57.7		73.8	92.7	white pad	1	low	med
11	Fortis	A92	26.7	45.6	65.8		67.8	97.8	none	1	loud	stiff
				50W	50W		100W	100W

The Dynatron Model-638 is a true performance heatsink, in fact if you look at the results of our tests with it on the large interface die you'll notice that it is the best of the reference coolers. However, since we rank heatsinks according to the smaller interface die it takes second place.

The main difference between the Thermal Integration heatsink and the Dynatron is the fan, the former is moderately loud and the latter is really noisy. Such is the price for performance cooling and on thing is for sure, this heatsink is made to work. Given the great performance on the larger interface die the Model-638 could probably be used on socket 423 processors with great results if desired. It does not comply with specs for the heatsink retention mechanism, but so long as you are not one to move your computer around too much it should be stable on the socket.