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
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
JMC	400124	19.5	36.6		52.1	none	1	med-low	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
NengTyi	XPC5000	23.8	38.4		53.9	none	1	med	loud
Alpha	PAL8942	27.9	42.6		54.0	none	1	med	med
CPUMate	DIA-10500	22.8	39.3		55.5	none	1	med	easy
Zalman	CNPS6500-AlCu	23.1	40.3		57.4	none	1	low	easy
Glacialtech	Igloo 3300	22.4	40.5		58.8	silver	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
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		62.2	white pad	1	med	med
Eumax	DW-45	22.6	44.0		62.7	none	1	med	easy
Zalman	CNPS5700D-Cu	25.7	44.6		64.0	none	1	med	easy
Vantec	CCK-7025	27.0	45.4		64.1	none	1	med	med
JMC	400094	26.1	46.6		65.0	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
Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
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

What you want to be looking at in the list of reference coolers are the 1U heatsinks which include the Arkua 848X-6B, Dynatron DC1206BMV and Vantec CCK-7015. Thermal performance of these largely copper skived heatsinks is not in the same class as desktop heatsinks, but we can see where they stand compared to one another.

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
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
Arkua	8568	15.4		29.3
NengTyi	XPC5000	14.6		30.1
Taisol	CCP445172	17.5		30.7
Dynatron	DC1207BMX	17.2		32.4
JMC	400124	17.1		32.6
CPUMate	DIA-10500	16.5		32.7
Thermal Integration (high)	TI-V7035TN	18.1		32.7
Dynatron	DC1206BMY	18.6		33.6
Zalman	CNPS6500-AlCu	17.2		34.3
Taisol	CEP426151A	19.4		35.4
Arkua	838T-7G	18.7		36.7
Glacialtech	Igloo 3300	18.1		37.1
Intel	Socket 478	19.4		37.4
Dynatron	DC1207BMW	19.5		37.9
Zalman	CNPS5700D-Cu	18.9		38.3
Vantec	CCK-7025	18.4		38.4
Titan	TTC-MT3AB	18.7		38.4
JMC	400094	20.5		38.9
Globalwin	VA476	20.8		39.3
Dynatron	DC1206BM-S	20.8		39.6
AVC	117160	20.3		39.8
Eumax	DW-45	21.4		40.1
Dynatron	DC1206BMV	22.0		45.1
Vantec	GSN-7105	25.1		46.6
Arkua	848X-6B	27.3		53.2
Dynatron	DC1U-B02	32.9		67.4
		50W		100W

The final results indicate that for this list of reference heatsinks, the Dynatron DC1U-B02 doesn't fare too well. This is especially true if we consider the results of heatsinks like Dynatron's own DC1206BMV 1U cooler. Frankly speaking, we are a little surprised that Dynatron equipped the DC1U-B02 with a 50mm squirrel cage fan when a 60mm fan could have been used just as easily...

In our own tests we were able to improve the thermal results for the Dynatron DC1U-B02 by adding a neoprene gasket under the squirrel cage fan to seal off any spaces which would have allowed air to circumvent the path through the copper fins. With two other minor modifications we were able to drop overall temperatures by about 5 degrees as compared to the stock configuration. I think the one-size fits all approach Dynatron have applied with the DC1U-B02 1U copper skive heatsink disregards the small optimizations which could have been done to improve the overall performance characteristic of this heatsink.

A work in progress maybe, but for the moment if you need a 1U heatsink for the Pentium 4 platform, do yourself a favor and stick with the older Dynatron DC1206BMV. While that model does use a top-intake fan which will suffer a little from the height restrictions of a 1U chassis, the difference between it and the DC1U-B02 is substantial.

Related Articles:

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

1. Vantec CCK-7015 1U Copper P4/Xeon Heatsink Review
2. Dynatron DC1206BM-V 1U Heatsink
3. JMC Phoenix 70 Radial Fin Heatsink
4. Arkua 848X-6B 1U Heatsink Review
5. Thermalright AX-7 Socket A heatsink