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
Zalman	CNPS7000A-Cu	21.4	33.8	37.9		46.3	55.8	none	1	low	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
Thermalright	SLK-900A	20.6	37.4	44.0		55.1	65.5	none	1	low	easy
Sibak	AC06725TH	22.5	42.9	46.2		61.7	67.7	none	1	Very loud	med
Jetart	JAKS29	21.1	36.2	46.3		52.0	67.9	none	1	loud	easy
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
Thermalright	SK-7	19.9	39.2	42.7		57.8	72.0	none	1	low	easy
Aopen	ACK7L	21.4	43.4	47.2		62.6	73.2	grey	1	low	easy
Scythe	Kamakaze	20.7	39.6	47.9		54.8	74.3	none	1	med	hard
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
Thermalright	SK6+	21.1	38.2	51.7		54.4	79.9	none	1	med	easy
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
Titan	D9TBCu35R1	21.5	44.5	53.2		68.7	83.0	none	1	med	easy
Spire	5U213C1H3G	19.8	45.8	54.4		67.1	83.3	pink	1	low	easy
Spire	SPA04B4	21.5	45.9	55.1		70.1	86.6	none	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

The CNPS7000A-Cu weighs close to 800 grams, so it is not surprising that all that copper works to keep temperatures very low. The initial test results are shown for both the large (P4) and small (AthlonXP) die interface tests. We are ranking this list by the 100W small interface die test results, but in just a moment we'll do the same for Pentium4 test die.

As a low noise heatsink the Zalman CNPS7000A-Cu simply excels. The two Thermalright heatsinks performed as they did only with the help of a 66dBA loud fan - so just imagine a screaming vacuum cleaner under your desk as opposed to the fairly quiet 42 dBA Zalman cooler which came in only a few degrees less in our tests. The new Tocools Novasonic-AlCu also holds up well to the CNPS7000A-Cu.

As a socket A heatsink the CNPS7000A-cu has one major limitation; the retention system for this socket relies upon the AMD motherboard mounting holes. Since these mounting holes in the PCB around the socket are far from common, the CNPS7000A-cu is not universally acceptable. Luckily, most performance oriented AMD AthlonXP motherboards worth their salt have the mounting holes in the PCB included. If you're motherboard doesn't, I'm afraid you'll have to look elsewhere as there is no way to mount the Zalman CNPS7000A-cu without them.

Up next, we take a look at the results for this heatsink on the Intel Pentium 4 Socket 478 platform.