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Home > Hardware Reviews > Cooling Systems

Thursday, July 07, 2005
Spire DiamondCool

1. Introduction

The need for top CPU Cooling solutions has become more and more apparent since the latest CPU technology with blinding speeds has become more prevalent. Both manufacturers, AMD and INTEL, compete in the MHz race, in order to achieve first place in the market. This has created the need for better CPU cooling solutions, which come in many different forms and from a number of manufacturers. One of them is Spire, a well known brand name and a manufacturer of cooling solutions for CPUs, PC cases, graphics cards, hard drives and other products. After three reviews on CPU coolers from Spire, two for AMD processors and one for Intel, this time we will be reviewing another Intel CPU cooler, the SP507B7-U DiamondCool, which supports all new P4 Prescott LGA-775 micro-processors.

The Cooler...and how it works...

Unlike the SP495S11-U Intel Spire cooler we looked at in our previous review, the SP507B7-U is not as simple in design as far as the cooling aspect is concerned. In the SP507B7-U, we have a set of four copper heat-pipes. The cooling procedure is simple enough and we will take a brief look at how it works in layman's terms.

The copper base is attached to the CPU. As the CPU temperature increases, so does the copper base temperature. Four copper heat-pipes, which start from the base and go all the way to the end of the 50 copper fins, contain a thermal reactive liquid which starts moving through the heat-pipes, covering all the distance towards the colder end of the fins. Then, the fan attached to the copper base, spins to cool down the fins (and eventually the liquid contained in the heat-pipes). Thus, when the liquid returns to the copper base and the CPU, it reduces the temperature. This circular movement is what keeps the CPU cool.

The diamond cooler and copper heat-pipes
Having said that, lets take a look at the fan itself. A UV reactive patented 90mm Diamond-Fan design resides on the top of the heatsink, which spins at 2700 RPM and produces an airflow of 34.46 CFM (Cubic Feet per Minute) at a noise level of 22.0 dBA. The UV reactive fan gives quite an impressive appearance to the case, provided a UV bar is installed.

The copper base heatsink, paste free...

Here are the detailed specifications as provided by Spire :

 Pentium 4 LGA775

Product Name

SP507B7-U DiamondCool


Heat Sink : 92×90×53 mm (l × w × h)
12VDC Fan : 80x80x25 mm


Ball bearing

Rated speed

2700 RPM +/-10%

Rated power

1.80 W

Noise level

22.0 dBA

Air flow

34.46 CFM at 2,700 RPM +/-10%


0.15 A

Life hours

Ball: 50.000


Blue transparent diamond fan, 4 heat-pipes, all copper stamped fin technology


3 pin, mainboard


Celeron D ~ 2.93 GHz 340J
Pentium 4 ~ 3.8 GHz (LGA-775 Prescott)

Thermal resistance

0.285 °C/W

Thermal type

Stars-420 white grease (Injection tube)

Now that we have covered the basics of the CPU cooler, lets move on to the test PC and the installation.

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