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

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
nPowertek	NPH-1	22.1	34.3		45.4	none	1	med	hard
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
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
Arkua	8568	22.4	37.8		51.7	none	1	med	med
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
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
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
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
Scythe	Kamakaze	26.1	44.0		63.0	none	1	med	hard
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
Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
Verax	P16Cu	26.4	48.4		71.5	none	1	low	easy
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

Make no bones about it, we were just as surprised by the initial results from the nPowertek NPH-1. Ranking in at practically the top of the reference list with just a pair of 70mm fans is very impressive, no matter how you look at it!

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
Thermalright (high)	SLK-900U	11.6		20.5
nPowertek	NPH-1	12.2		23.3
Alpha	PAL8942	14.7		26.1
Zalman	CNPS7000-Cu	14.1		27.7
AVC	117140	15.2		27.8
JMC	401100	15.6		27.9
Coolermaster	IHC-H71	14.0		28.1
Taisol	CEP447181	14.6		28.7
Arkua	8568	15.4		29.3
Intel	Stock 3.06GHz	15.0		30.1
Spire	SP411C5	17.3		31.7
Taisol	CCP445172	17.5		30.7
Arkua	Q85X-7J	16.7		31.9
Dynatron	DC1207BMX	17.2		32.4
Thermal Integration (high)	TI-V7035TN	18.1		32.7
Cooljag	JVC661A	17.3		33.5
Dynatron	DC1206BMY	18.6		33.6
Zalman	CNPS6500-AlCu	17.2		34.3
Taisol	CEP426151A	19.4		35.4
Spire	SP420B8	17.4		36.2
Arkua	8456X-8T	18.6		36.3
Arkua	838T-7G	18.7		36.7
Scythe	Kamakaze	17.9		36.9
Intel	Socket 478	19.4		37.4
Dynatron	DC1207BMW	19.5		37.9
Zalman	CNPS5700D-Cu	18.9		38.3
Evercool	NW9F715CA	19.1		38.5
Globalwin	VA476	20.8		39.3
Dynatron	DC1206BM-S	20.8		39.6
AVC	117160	20.3		39.8
Arctic Cooling	SuperSilent4 Pro	21.7		43.0
Verax	P16Cu	22.0		45.1
Vantec	GSN-7105	25.1		46.6
Arkua	848X-6B	27.3		53.2
Verax	P16	27.4		54.0
Dynatron	DC1U-B02	32.9		67.4
		50W		100W

Remember how I said we tested the nPowertek NPH-1 a few times? The first time we ran the heatsink through the synthetic temperature test platform I had inadvertently connected the two fans up to the 5V line from the Zalman Multiconnector 1 (basically a 4 way Y-splitter). The NPH-1 ran really quietly naturally, and ranked in at 18.1 Celsius rise above ambient on the 50W load test, and 35.2 Celsius on the 100W load test. Pretty good results, and a little higher than I had actually expected.

After realizing the error, the nPowertek NPH-1 was retested with the fans connected to the proper 12V power supply and the results logged. The rise above ambient temperature was so low that I felt compelled to test the heatsink yet again. True to form, the nPowertek NPH-1 reached the same rise above ambient temperature results that you see in the chart above.

That the NPH-1 was able to give the Thermalright SLK-900U and it's 38mm thick 80mm Delta 'screamer' a run for its money while only producing 52.3 dB of noise is impressive to say the least. Add to that the fact that the twin fans can be run at 5V and still enable the NPH1 to perform quite well. Ultimately, the nPowertek NPH-1 is a heatsink that tackles performance cooling at moderate noise levels, and low-noise cooling at very nice thermals. With thermal performance and versatility of this magnitude the nPowertek NPH-1 is a heatsink I would highly recommend, even if it doesn't posses the most hassle-free mounting mechanism in the world.

Related Articles:

Here are a few other articles that you might enjoy as well...

1. Verax P16Cu heatsink
2. Spire SB420B8 CopperStream P4 Heatsink Review
3. Arkua Q85X7J Heatpipe Pentium 4 Heatsink Review
4. Taisol CEP447181 Pentium 4 Heatsink Review
5. Spire SP411C5 QuieTude II Heatsink Review