Information not expressly stated in the Final Rise above Ambient Temperature Test Results List concerns the pre-applied thermal pad (we remove this for testing any way), the number of fans on each heatsink, general fan noise and clip force observations, and ambient temperature measurements. As always, FrostyTech's Synthetic Temperature Test results for the Socket A AMD AthlonXP and Socket 478 Intel Pentium 4 platform are grouped according to the results for the 100W test die.

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

(Socket A - AthlonXP) Rise Above Ambient Temp. (c)
Mfg.	Model	15mm small copper block		15mm small copper block
		50W		100W
Thermalright	SLK800	15.8		29.9
Thermalright	AX-7	15.4		30.4
Tocools	Novasonic-AlCu	17.8		32.9
Coolink	U1P2	19.8		36.1
Tocools	Novasonic	17.0		36.5
Coolermaster (high)	ASBV73U1	18.1		36.7
Thermal Integration	TI-V77L	17.9		37.1
Arkua	628	18.2		38.4
Gigabyte (high)	3D Cooler Pro	20.5		39.4
Sibak	AC02625B	35.8		41.5
Gigabyte (high)	PCU31-VH	20.4		41.9
Thermalright	SLK-900A	23.4		44.9
Sibak	AC06725TH	23.7		45.2
Coolermaster	HHC-001	23.1		46.4
Jetart	JAKS29	25.2		46.8
Thermal Integration	TI-A8641L	22.1		47.7
AVC	Tundra2	26.5		49.1
Vantec	VA4-7245	25.9		49.2
Gigabyte	PCU22-SE	26.9		49.7
Thermaltake	Silent Boost	24.6		50.3
Evercool	CUF715	25.0		51.1
Aopen	ACK7L	26.0		51.8
Thermalright	SK-7	22.8		52.1
Coolermaster	HSC-V62	31.4		53.1
Zalman	CNPS6000-Cu	29.0		53.4
Scythe	Kamakaze	27.2		53.6
Spire	5F263	29.2		53.6
Taisol	CGK760092	37.8		54.1
AVC	112AM1	28.1		54.8
Arkua	728M-7N01	27.0		55.0
Titan	TTC-CU9TB/SC	28.6		57.5
TTIC	NPH-201	21.0		57.7
Thermalright	SK6+	30.7		58.7
Taisol	CEK787172	32.0		60.5
Titan	D9TBCu35R1	31.7		61.5
nPowertek	TTIC NPH-2	30.0		61.9
Verax	P14Cu	31.9		63.2
Spire	5U213C1H3G	34.6		63.5
Spire	SPA04B4	33.6		65.1
ArcticCooling	CuSilent2	37.0		66.6
Akasa	AK821	34.5		70.5
Verax	P11T	43.6		76.6
		50W		100W

The AthlonXP processor has a significantly smaller surface area in direct contact with the base of a heatsink as compared to the Pentium 4, or Athlon64 chip. Some heatsinks designed to operate on both platforms fail because of this, but the Gigabyte 3D Rocket Cooler PCU22-SE performs quite well for itself in the AthlonXP portion of the synthetic temperature tests. The full copper Gigabyte 3D Cooler PCU31-VH still manages to hang onto a formidable lead however.

( Socket 478 - Pentium4 ) Rise Above Ambient Temp. (C)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
Gigabyte (high)	PCU31-VH	12.5		22.3
Coolermaster (high)	Hyper6 KHCV81U1	12.4		23.4
Asus (high)	Crux P4 XB7N	13.9		24.4
Zalman	CNPS7000A-Cu	12.4		24.9
Alpha	S-PAL8952	12.7		25.4
AVC	Z7U7408001	12.9		25.8
Alpha	PAL8942	14.7		26.1
Gigabyte (high)	3D Cooler Pro	15.6		26.6
Zalman	CNPS7000-Cu	14.1		27.7
AVC	117140	15.2		27.8
JMC Products	401100	15.6		27.9
Coolermaster (high)	Jet4	12.6		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
Gigabyte	PCU22-SE	17.3		31.3
Vantec	VP4-7245	18.0		31.7
Verax	Polargate AL S	17.0		32.9
AOpen	ACP4SH	17.4		33.0
Scythe (6" dist.)	NCU-2000	17.2		33.4
Scythe	Kamakaze	18.9		34.1
Spire	SP420B8	17.4		36.2
Evercool	NW9F715CA	19.1		38.5
Aopen	ACP4LC	17.9		38.8
Arctic Cooling	SuperSilent4 Pro	21.7		43.0
Verax	P16Cu	22.0		45.1
Verax (high)	P17CuX	27.8		47.6
Cooljag	2QC/180	29.3		60.1
Cooljag	JACE2DC/180	30.7		61.6
Cooljag	E44C/180	33.8		66.9
Dynatron	DC1U-B02	32.9		67.4
		50W		100W

On the Intel Pentium 4 synthetic temperature tests, the Gigabyte 3D Rocket PCU22-SE manages similar results relative to the other reference heatsinks. The cooler performs well, coming in about middle of the pact, but still a ways behind the Gigabyte 3D Cooler Pro and PCU31-VH full copper heatsinks. Since there is no fan speed adjustment built into the PCU22-SE model (it is aimed at mainstream users) direct comparisons cannot really be made, especially considering that the two other Gigabyte coolers attained those results with the fan running at full RPM.

Still, as a multi-processor cooling solution the Gigabyte PCU22-SE performs well, with a moderate noise output of about 50 dBA. This makes it a good option for mainstream users with spacious cases. If you are looking to upgrade from one platform to another in the near future, an all-in-one heatsink such as the Gigabyte 3D Rocket PCU22-SE is a worthy option to consider.

For more reviews on the latest heatsinks and cooling solutions, rely on FrostyTech's inventory of 350+ heatsink reviews.

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