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
1	AVC	117140	22.6	37.8		50.4	none	1	med	med
2	Coolermaster	IHC-H71	23.0	37.0		51.1	none	1	loud	stiff
3	Arkua	8568	22.4	37.8		51.7	none	1	med	med
4	NengTyi	XPC5000	23.8	38.4		53.9	none	1	med	loud
5	Zalman	CNPS6500-AlCu	23.1	40.3		57.4	none	1	low	easy
6	Vantec	GSN-7025	22.5	41.7		58.5	none	1	med	med
7	Chauh Choung	DTA-478	22.4	42.1		59.0	carbon	1	low	med
8	Intel	Socket 478	22.4	41.8		59.8	carbon	1	low	med
9	Titan	TTC-MT3AB	22.8	41.5		61.2	none	2	loud	stiff
10	Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
11	AVC	117160	22.4	42.7		62.2	white pad	1	med	med
12	Cho-Liang	CL-CB00881	23.6	41.2		65.0	none	1	med	easy
13	Cho-Liang	CL-CB0094-1A	23.2	39.5		67.9	none	1	med	easy
14	Dynatron	DC1206BMV	23.1	45.1		68.2	none	1	low	easy
15	Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
				50W		100W

It has been some time since we saw a heatsink enter on the list of reference heatsinks at such a high position. The Coolermaster IHC-H71 shows off very good initial performance by entering at the number two spot. Although it uses a louder fan than the AVC Sunflower its' design is a little more traditional than that cooler. AVC have a very solid product, and that is best shown by the fact Intel have chosen it for their heatsinks.

However, regardless of that, Coolermaster have managed to out perform the Arkua cooler which is no small feat either. Arkua are one of our favorite manufacturers around here and it was good to see that Coolermaster surpass those high standards as well.

Rise Above Ambient Temp. (c)
	Mfg.	Model	27mm large copper block		27mm large copper block
			50W		100W
1	AVC	117140	15.2		27.8
2	Coolermaster	IHC-H71	14.0		28.1
3	Arkua	8568	15.4		29.3
4	NengTyi	XPC5000	14.6		30.1
5	Zalman	CNPS6500-AlCu	17.2		34.3
6	Vantec	GSN-7025	19.2		36.0
7	chauh Choung	DTA-478	19.7		36.6
8	Intel	Socket 478	19.4		37.4
9	Titan	TTC-MT3AB	18.7		38.4
10	Dynatron	DC1206BM-S	20.8		39.6
11	AVC	117160	20.3		39.8
12	Cho-Liang	CL-CB00881	18.2		41.4
13	Cho-Liang	CL-CB0094-1A	16.3		44.7
14	Dynatron	DC1206BMV	22.0		45.1
15	Vantec	GSN-7105	25.1		46.6
			50W		100W

The results are so close between the AVC and Coolermaster heatsinks that they are just about equal. It is interesting to note that the temperatures on the 50W heat source are better for the Coolermaster heatsink, but then slightly less on the 100W test.

One possible explanation may be that the heatpipes were working best at 50W, but then were pushed past their ideal operating temperature on the 100W test. Not knowing the exact specs for the heatpipes it is difficult to say for sure, but it is easy to see that the Coolermaster IHC-H71 is a very good performer, and much better than the stock Intel heatsink.

With the twin heatpipes, copper construction and speedy fan the Coolermaster IHC-H71 is a heatsink to watch out for. Coolermaster have done it again and we are glad we had a chance to test out a Pentium 4 heatsink that keeps the performance bar up high.

Although the base finish is lower than what you may expect to see on a AMD targeted heatsink, it is not too bad for those heatspreader toped Pentium 4 processors. More importantly, when we tested the base with an engineers straight edge we could see just how flat the base actually was. Over the center, where the heatsink makes contact with the processor flatness was very good.

Overall, this is an easily recommended heatsink for anyone looking to add an extra bit of cooling power to their socket m478 Pentium 4 processor, just keep in mind that you will also be adding a few decibels of noise along with it.