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
Thermalright	SLK800	21.7	34.8	37.5		45.2	51.6	none	1	loud	med
Thermalright	AX-7	21.7	34.8	37.1		46.1	52.1	none	1	loud	med
Tocools	Novasonic-AlCu	20.1	33.1	37.9		49.3	53.0	none	1	med	easy
Tocools	Novasonic	22.9	40.9	39.9		54.4	59.4	none	1	med	stiff
Coolermaster (high)	ASBV73U1	25.5	38.9	43.6		50.2	62.2	none	1	loud	easy
Coolink	U1P2	26.1	39.4	44.9		50.9	62.2	none	2	loud	easy
Arkua	628	23.9	42.7	42.1		58.9	62.3	none	1	med	med
Thermal Integration	TI-V77L	26.5	39.1	44.4		57.5	63.6	grey	1	med	med
Sibak	AC02625B	23.2	41.3	59.0		43.2	64.7	none	1	loud	med
Sibak	AC06725TH	22.5	42.9	46.2		61.7	67.7	none	1	Very loud	med
Coolermaster	HHC-001	21.7	40.0	44.8		56.3	68.1	none	1	loud	easy
AVC	Tundra2	22.0	41.4	47.5		59.0	71.1	none	1	loud	stiff
Coolermaster	HSC-V62	21.4	47.4	52.8		61.7	74.5	none	1	quiet	easy
Arkua	728M-7N01	20.8	40.5	47.8		60.5	75.8	metal	1	med	easy
Spire	5F263	22.6	44.7	51.8		64.3	76.2	white	1	low	med
Taisol	CGK760092	23.4	42.7	51.3		61.2	77.5	pink	1	low	med
Zalman	CNPS6000-Cu	24.8	46.4	53.8		65.6	78.2	none	1	very low	easy
Titan	TTC-CU9TB/SC	21.9	43.7	49.9		63.5	78.8	none	1	loud	easy
AVC	112AM1	24.8	46.6	52.9		70.1	79.6	none	1	low	stiff
Taisol	CEK787172	21.5	38.4	53.5		57.3	82.0	PCM45	1	med	easy
nPowerTek	TTIC NPH-2	20.6	35.2	50.3		60.6	82.5	none	1	med	easy
Spire	5U213C1H3G	19.8	45.8	54.4		67.1	83.3	pink	1	low	easy
ArcticCooling	CuSilent2	20.1	42.7	57.4		68.1	86.7	none	1	low	med
Verax	P14Cu	25.5	51.3	57.4		75.2	88.7	white	1	silent	easy
Akasa	AK821	22.7	49.4	57.2		74.1	93.2	grey	1	med	med
Verax	P11T	26.1	61.2	69.7		90.9	102.7	none	1	none	easy
			50W	50W		100W	100W

As a low noise heatsink, the initial results are seen in a different light than with other typical heatsinks. In other words, the higher temperatures are expected as a necessity of the lower fan noise. The Arctic cooling Copper Silent 2 seems to be handling the job a little better than the Verax P14Cu - but only just by a few degrees.

As a low noise heatsink we are primarily comparing the Arctic Cooling Copper Silent 2 against the Verax and Zalman heatsinks.

In this regard the Arctic cooling isn't quite able to match the most recent Verax heatsink to incorporate a CGDS copper base plate - the Verax P14Cu. Still, the Arctic Cooling heatsink does offer pretty decent low noise cooling for a primarily aluminum heatsink.

Noise levels are very good, but just a little louder than the Verax heatsinks. Given the economics of the two types of heatsinks, the Arctic Cooling is considerably more affordable. Compared to the all copper Zalman CNPS 6000-Cu, the Arctic cooling heatsink isn't quite able to keep up with the temperatures witnessed by that 47dB heatsink, though it is quieter by a significant amount.

Ultimately, while the thermal test numbers may seem a stark contrast from most of the heatsinks on this reference list, as a low-noise heatsink the Arctic Cooling Copper Silent 2 is able to offer moderately decent temperatures at very low noise levels. Economically, it offers itself at a more competitive price point than the extremely quiet Verax heatsinks, but again falls short of the versatility of the Zalman CNPS-6000Cu.