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	AX-478	22.3	34.1		44.5	none	1	very loud	med
Vantec	VP4C7040	21.4	36.0		50.4	none	1	med	med
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
NengTyi	XPC5000	23.8	38.4		53.9	none	1	med	loud
Alpha	PAL8942	27.9	42.6		54.0	none	1	med	med
Tocools	Regal	21.4	38.3		54.2	none	1	med	med
Zalman	CNPS6500-Cu	23.4	41.1		57.9	none	1	low	easy
Vantec	GSN-7025	22.5	41.7		58.5	none	1	med	med
Glacialtech	Igloo 3300	22.4	40.5		58.8	silver	1	low	easy
Chauh Choung	DTA-478	22.4	42.1		59.0	carbon	1	low	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
Dynatron	DC1207BMW	23.2	42.7		61.1	none	1	med	easy
Titan	TTC-MT3AB	22.8	41.5		61.2	none	2	loud	stiff
Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
AVC	117160	22.4	42.7		61.1	white pad	1	med	med
Zalman	CNPS6500B-AlCu	26.3	42.9		61.3	none	1	low	easy
Cho-Liang	CL-CB00881	23.6	41.2		65.0	none	1	med	easy
Cho-Liang	CL-CB0307Z17	24.2	45.6		65.7	none	1	med	easy
Cho-Liang	CL-CB0094-1A	23.2	39.5		67.9	none	1	med	easy
Globalwin	VA476	28.7	49.5		68.0	grey	1	med	easy
Dynatron	DC1206BMV	23.1	45.1		68.2	none	1	low	easy
ChoLiang	Cl-CB0309Z17	24.3	46.7		68.6	none	1	med	stiff
Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
Verax	P16	21.4	53.3		77.8	lead	1	none	med
			50W		100W

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
Thermalright	AX-478	11.8		22.2
Alpha	PAL8942	14.7		26.1
AVC	117140	15.2		27.8
Coolermaster	IHC-H71	14.0		28.1
Vantec	VP4C7040	14.6		29.0
Arkua	8568	15.4		29.3
NengTyi	XPC5000	14.6		30.1
Tocools	Regal	16.9		32.8
Zalman	CNPS6500B-Cu	17.7		34.5
Zalman	CNPS6500B-AlCu	19.5		34.8
Taisol	CEP426151A	19.4		35.4
Vantec	GSN-7025	19.2		36.0
Glacialtech	Igloo 3300	18.1		36.4
chauh Choung	DTA-478	19.7		36.6
Intel	Socket 478	19.4		37.4
Dynatron	DC1207BMW	19.5		37.9
Titan	TTC-MT3AB	18.7		38.4
Globalwin	VA476	20.8		39.3
Dynatron	DC1206BM-S	20.8		39.6
AVC	117160	20.3		39.8
Cho-Liang	CL-CB00881	18.2		41.4
Cho-Liang	Cl-CB0307Z17	21.4		41.5
Cho-Liang	CL-CB0309Z17	22.4		44.3
Cho-Liang	CL-CB0094-1A	16.3		44.7
Dynatron	DC1206BMV	22.0		45.1
Vantec	GSN-7105	25.1		46.6
Verax	P16	31.9		56.4
		50W		100W

Ultimately, the Tocools Regal proves its capability as a very good Pentium 4 heatsink, and one that offers a few degrees better thermal performance than the stock Intel heatsink (though it is drastically louder).

Tocools have a serious issue with selecting the right kind of clip assemblies to use with their heatsinks. The Tocools Regal has very good thermal performance, but the two spring tensioned wire clips that hold the unit in place are far from ideal.

It is not as though they are hard to install, it's just that the clips may not stay put in the event the case is bumped hard. As with the socket A Novasonic cooler which had excellent thermal performance but a poor clip mechanism, Tocools really ought to design the pentium 4 Regal heatsink with a clipping system that holds better. In any case, the Regal is still a very good cooler.

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