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
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
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
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
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
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
Cho-Liang	CL-CB00881	23.6	41.2		65.0	none	1	med	easy
JMC	400094	26.1	46.6		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
Arkua	848X-6B	27.2	54.5		80.4	none	1	low	med
			50W		100W

To be quite frank, we did not expect the CPUmate DAI-10500 to produce very good thermal results after we first examined it. Another heatsink we reviewed previously, the TS Heatronics ZEN cooler used similar concepts and wasn't much of a performer.

However, once we had the test block up and running the thermal result told an entirely different story, and while the initial results still peg it a few points behind the high performers in this reference list, for the CPUMate DIA-10500 the results are quite good.

Rise Above Ambient Temp. (c)
Mfg.	Model	27mm large copper block		27mm large copper block
		50W		100W
Alpha	PAL8942	14.7		26.1
AVC	117140	15.2		27.8
Coolermaster	IHC-H71	14.0		28.1
Arkua	8568	15.4		29.3
NengTyi	XPC5000	14.6		30.1
CPUMate	DIA-10500	16.5		32.7
Zalman	CNPS6500-AlCu	17.2		34.3
Taisol	CEP426151A	19.4		35.4
chauh Choung	DTA-478	19.7		36.6
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
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
Arkua	848X-6B	27.3		53.2
		50W		100W

Looking like a little cube, the CPUmate DIA-10500 is an unassuming Pentium 4 heatsink that for its size, and materials appears to perform quite well. In this list of reference heatsinks the DIA-10500 manages to produce temperature results in an area dominated by predominantly copper heatsinks.

The twin heatpipes embedded in each of the heatsink's bases work effectively to move heat energy from the processor core to a larger surface area - without increasing the size of the heatsink at all.

Given the special HSRM we were a little concerned about how easy it would be to install the heatsink, but much to our surprise the unit CPUmate use works well. Once the blue HSRM is installed on the motherboard it is simply a matter of dropping the DIA-10500 in the right way (it is keyed so you can't make a mistake), and placing the top on. A small lever with a cam then applies the correct pressure and that's about it.

The thin, short fins of the aluminum heatsink provide good airflow characteristics and I suppose if the P4 socket is oriented in the correct way, an easy path to exhaust directly into the lower power supply intake fan.

The CPUmate DIA-10500 finish is good, and the machining of the heatsink looks as though it was done with consideration, but most of all it is the thermal results we are interested in. For a heatsink of this size, and made almost entirely of aluminum construction landing a sub 35 C degree rise above ambient temperature result is impressive. Bottom line, the CPUmate DIA-10500 offers better performance than the stock Intel heatsink but isn't able to offer quieter cooling. Noise is a moderate issue, but thankfully isn't high-pitched at all.

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