The DTA-15 uses a small fan that operates a moderate RPM speeds so we don't have a really, really loud heatsink here, despite what it looks like the waveform graph. The best way to hear for your self is to click on the little pair of headphones and hear for your self.

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	Swiftech	MCXC370	21.4	38.3	43.4		53.5	65.7	none	1	med	med
3	OCZ	Gladiator	21.4	33.3	47.3		50.6	70.3	none	1	very loud	med
4	Thermal Integration	TI-V86-15	24.9	48.2	46.0		70.8	71.9	none	1	med	med
5	Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
6	Chauh Choung	DAT-15	24.2	44.7	52.2		66.3	73.4	none	1	low	med
7	Swiftech	MCX370	22.3	42.0	46.1		60.3	75.6	none	1	med	hard
8	Akasa	Silver Mountain	26.6	46.2	51.5		65.0	76.1	none	1	loud	med
9	Thermal Integration	TI-S86-15	24.9	48.4	50.4		72.3	77.2	none	1	med	med
10	AVC	112AM1	24.8	46.6	52.9		70.1	79.6	none	1	low	stiff
11	Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
12	Spire	5T060B1H3R	26.7	42.7	57.5		64.6	85.1	none	1	low	med
13	Thermalright	CB-6L	24.6	50.3	57.7		73.8	92.7	white pad	1	low	med
				50W	50W		100W	100W

Well the first thing that comes to my mind is perhaps we underestimated the coverage of that solder under the copper plate. The DTA-15 manages to produce some surprisingly good results for an OEM heatsinks, and seems to handle the higher 100W heat load well enough.

In this list of heatsinks however, the Thermal Integration shows the best possible performance, with the similar CB-6L bringing up the far rear.

Conclusions:

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	Swiftech	MCXC370	16.9	22.0		32.1	44.3
3	Vantec	CCK-6027D	18.0	22.2		37.5	46.0
4	Thermal Integration	TI-V86-15	23.3	21.1		45.9	47.0
5	OCZ	Gladiator	12.0	26.0		29.2	49.0
6	Chauh Choung	DTA-15	20.5	28.0		42.1	49.2
7	Akasa	Silver Mountain	19.6	24.9		38.4	49.5
8	Thermal Integration	TI-S86-15	23.5	25.5		47.4	52.3
9	Swiftech	MCX370	19.7	23.8		38.0	53.3
10	AVC	112AM1	21.8	28.1		45.3	54.8
11	Thermaltake	Volcano 6cu+	13.8	28.8		32.1	57.9
12	Spire	5T060B1H3R	16.0	30.8		37.9	58.4
13	Thermalright	CB-6L	25.7	33.1		49.2	68.1
			50W	50W		100W	100W

While the DTA-15 manages to come in as an average cooler, I can't help wonder if this OEM heatsink was just lucky? The solder used to hold the copper plate in place is less than even around the edges, and could mean big variations between one heatsink and another. That is really just speculation, but I'm sure it is difficult to get even and consistent soldering each and every time so there has to be some small amount of variance.

In any case the numbers speak for themselves, and while the DTA-15 absolutely can't handle large heatspreader covered processors, it does pretty well with the bare silicon variety.