Synthetic Temperature Test Results: *Ranked according to 100W interface die test results.

Initial FrostyTech Synthetic Temperature Test Platform Results
Mfg.	Model	Ambient Temp.	27mm large copper block		27mm large copper block	Thermal pad	No. Fans	Fan Noise	Clip force
			50W		100W
Thermalright (high)	SLK-900U	20.0	31.6		40.5	none	1	very loud	easy
Coolermaster (high)	Hyper6 KHCV81U1	20.8	33.2		44.2	none	1	loud	easy
Cooljag (high)	CJC66IC-A	23.0	53.4		44.3	none	1	loud	easy
Gigabyte (high)	PCU31-VH	22.8	35.3		45.1	none	1	very loud	easy
Zalman	CNPS7000A-Cu	21.4	33.8		46.3	none	1	low	easy
Thermal Integration	TI-RV104N	21.0	35.4		46.4	none	1	loud	easy
Coolermaster (low)	Hyper6 KHCV81U1	20.5	34.9		47.6	none	1	med	easy
JMC	401100	19.5	35.1		47.4	grey	1	med	easy
Zalman	CNPS7000-Cu	21.0	35.1		48.7	none	1	low	easy
Gigabyte (high)	3DCooler-pro	22.6	38.2		49.2	none	1	very loud	easy
Coolermaster (high)	Jet 4	22.2	34.8		50.3	none	1	very loud	hard
Taisol	CCP445172	20.2	37.7		50.9	none	1	med	easy
AVC	117140	22.6	37.8		50.4	none	1	med	med
Coolermaster	IHC-H71	23.0	37.0		51.1	none	1	loud	stiff
Thermal Integration	TI-RV108N	19.5	35.4		51.2	none	1	med	easy
Arkua	8568	22.4	37.8		51.7	none	1	med	med
Jetart	JAP416A	23.1	34.9		52.2	none	1	loud	easy
Zalman	CNPS7000A-Cu	25.9	39.2		52.5	none	1	low	easy
Thermal Integration	TI-A8736N	23.5	35.9		52.6	none	1	loud	easy
Thermal Integration (high)	TI-V7035TN	20.2	38.3		52.9	none	1	very loud	easy
Dynatron	DC1206BMY	19.5	38.1		53.1	none	1	med	easy
Dynatron	DC1207BMX	20.9	38.1		53.3	none	1	med	easy
Taisol	CEP447181	24.8	39.4		53.5	white	1	med	easy
Jetart	JAP407A	23.7	37.5		53.9	none	1	loud	easy
Alpha	PAL8942	27.9	42.6		54.0	none	1	med	med
Intel	Stock 3.06GHz	24.9	39.9		55.0	none	1	med	easy
Arkua	Q85X-7J	24.6	41.3		56.5	none	1	med	easy
CoolJag	JVC661A	23.2	40.5		56.7	none	1	med	easy
Spire	SP411C5	25.2	42.5		56.9	white	1	loud	easy
Zalman	CNPS6500-AlCu	23.1	40.3		57.4	none	1	low	easy
TS Heatronics (6" fan dist)	NCU-1000	23.9	39.5		57.5	none	0	N/A	med
Taisol	CEP426151A	24.3	43.7		59.7	none	1	med	easy
Intel	Socket 478	22.4	41.8		59.8	carbon	1	low	med
Arkua	838T-7G	23.3	42.0		60.0	none	1	med	easy
Titan	CW9TB/SC	22.5	41.4		60.8	none	1	loud	easy
Dynatron	DC1207BMW	23.2	42.7		61.1	none	1	med	easy
Arkua	8456X-8T	25.1	43.7		61.4	none	1	low	easy
Spire	SP420B8	25.3	42.7		61.5	none	1	low	easy
Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
AVC	117160	22.4	42.7		62.2	white pad	1	med	med
Evercool	NW9F715CA	23.8	42.9		62.3	none	1	med	easy
Aopen	ACP4LC	24.1	42.0		62.9	grey pad	1	med	easy
Scythe	Kamakaze	26.1	44.0		63.0	none	1	med	hard
Evercool	CUW8-715	23.0	44.8		63.8	none	1	med	easy
Zalman	CNPS5700D-Cu	25.7	44.6		64.0	none	1	med	easy
Globalwin	VA476	28.7	49.5		68.0	grey	1	med	easy
Arctic Cooling	SuperSilent4 Pro	25.1	46.8		68.1	none	1	low	stiff
Dynatron	DC1206BMV	23.1	45.1		68.2	none	1	low	easy
Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
Verax	P16	21.8	49.2		75.8	none	1	none	med
Arkua	848X-6B	27.2	54.5		80.4	none	1	low	med
Dynatron	DC1U-B02	20.9	53.8		88.3	none	1	loud	stiff
			50W		100W

The initial test results on Frosty's Synthetic Temperature Test platform are really good - higher than I'd expected in fact. I think it is safe to say that the Coolermaster Hyper6 KHCV81U1 heatsink is easily going go end up in the performance heatsink section; making it an ideal choice for overclocking both Intel Pentium4 and AMD Athlon64 processors!

At the highest fan speed setting the Coolermaster Hyper6 initially comes in towards the top of this list of reference heatsinks. With the fan RPM set as low as possible, the sound output is only about 7 dBA lower, with temperatures rising by an order of approximately 3 degrees. For the final word, we need to see the rise above ambient temperature results.