Information not expressly stated anymore concerns the pre-applied thermal pad (we remove this for testing any way), the number of fans, general fan noise and clip force observations, and ambient temperature.

As always, Frosty's Synthetic Temperature Test results for the Socket 478 Intel Pentium 4 platform are grouped according to the results of the 100W test die.

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

( Socket 478 - Pentium4 ) 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
Cooljag (high)	CJC66IC-A	10.4		21.3
Gigabyte (high)	PCU31-VH	12.5		22.3
Coolermaster (high)	Hyper6 KHCV81U1	12.4		23.4
Zalman	CNPS7000A-Cu	12.4		24.9
Thermal Integration	TI-RV104N	14.4		25.4
AVC	Z7U7408001	12.9		25.8
Alpha	PAL8942	14.7		26.1
Gigabyte (high)	3DCooler-pro	15.6		26.6
Zalman	CNPS7000-Cu	14.1		27.7
AVC	117140	15.2		27.8
JMC	401100	15.6		27.9
Coolermaster (high)	Jet4	12.6		28.1
Coolermaster	IHC-H71	14.0		28.1
Taisol	CEP447181	14.6		28.7
Jetart	JAP416A	11.8		29.1
Thermal Integration	TI-A8736N	12.4		29.1
Arkua	8568	15.4		29.3
Intel	Stock 3.06GHz	15.0		30.1
Jetart	JAP407A	13.8		30.2
Taisol	CCP445172	17.5		30.7
Thermal Integration	TI-RV108N	15.9		31.7
Spire	SP411C5	17.3		31.7
Vantec	VP4-7245	18.0		31.7
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
TS Heatronics (6" fan dist)	NCU-1000	15.6		33.6
Dynatron	DC1206BMY	18.6		33.6
Scythe	Kamakaze	18.9		34.1
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
Intel	Socket 478	19.4		37.4
Dynatron	DC1207BMW	19.5		37.9
Zalman	CNPS5700D-Cu	18.9		38.3
Titan	CW9TB/SC	18.9		38.3
Evercool	NW9F715CA	19.1		38.5
Aopen	ACP4LC	17.9		38.8
Globalwin	VA476	20.8		39.3
Dynatron	DC1206BM-S	20.8		39.6
AVC	117160	20.3		39.8
Evercool	CUW8-715	21.8		40.8
Arctic Cooling	SuperSilent4 Pro	21.7		43.0
Dynatron	DC1206BMV	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

The radically designed AVC Z7U7408001 weighs in with high-performance results in our list of reference heatsinks. In the comparison above, which illustrates final rise above ambient temperatures, the AVC Z7U7408001 heatsink manages a respectable 25.8 degrees Celsius - just 5 degrees warmer that the current top rated cooler/fan combo we have tested.

With figures like this, I think it's easy to agree that AVC are more than just another OEM company producing heatsinks under another brand name. The AVC Z7U7408001 isn't the quietest heatsink in the Pentium 4 inventory, but it handles the task admirably for something of its size, and weight. Virtually all the other heatsinks which have managed to produce thermal results under 30 degrees are constructed primarily from copper. That makes them heavy; 600 grams, 700 grams - a big load by any estimation. This heatsink is much lighter than any heatsink above it, except perhaps the Thermal Integration Ti-RV104N.

Bottom line, with its twin heatpipes, and twin sets of cooling fins, the AVC Z7U7408001 Pentium 4 heatsink is a pretty good high performance cooler, and an excellent one considering its mass. Although it creates upwards of 64 dBA noise, it should easily find a home in high end systems that need Prescott FMB1.5 cooling capability.

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

1. Coolermaster Hyper6 KHCV81U1 Review
2. Gigabyte 3DCooler-Ultra PCU31-VH P4/K7/K8 Heatsink Review
3. Coolermaster Jet 4 ICB-V83 Pentium 4 Heatsink
4. Scythe Kamakaze AthlonXP / Pentium 4 Heatsink Review
5. Thermal Integration TI-RV108N Pentium 4 Heatsink
6. Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
7. Vantec VP4-7245 Aeroflow 2 P4 Heatsink Review