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The thinnest part of the copper nickel-plated base is 4 mm. Its contact surface is exceptionally even and gets a solid “B” for the finish quality:

 

Cooler Master GeminII S524 is equipped with a seven-blade 120x120x25 mm fan:

This fan is constructively very similar to the new XtraFlo (R4-XFBL-22PR-R1), which impeller generates “extra high airflow”, according to Cooler Master. However, the fan on GeminII S524 has different speed characteristics and is built on a regular frictionless bearing with 40,000 hours MTBF instead of a brand-new DynaLoop bearing used in the original XtraFlo. The fan supports PWM rotation speed control feature that is why its speed may be adjusted automatically between 800 and 1800 RPM creating 34.2-77.7 CFM airflow and generating 15.1-31.6 dBA of noise. The static pressure of the fan is also mentioned among the cooler specifications and equals 0.43-2.46 mmH2O. The maximum fan power consumption shouldn’t exceed the official 3.9 W, and our tests showed it at 3.7 W.

Another peculiarity of the Cooler Master GeminII S524 cooler is its ability to accommodate a 140x140x25 mm fan, which will be fastened using special additional holes in the corners of the steel frame:

Overall, we would like to point out that the use of screws for attaching the cooling fan to the heatsink is gradually being replaced by contract-free method with silicone mounts, which also allow lowering vibrations and noise. It’s a pity that Cooler Master hasn’t yet adopted this simple and at the same time very efficient approach.

GeminII S524 is compatible with all contemporary platforms, and once LGA2011 mainboards come out, Cooler Master promises to supply all of their current coolers with the proper retention kits. The installation procedure is technically simple and is described in detail in the following manual (PDF-file, 1.72 MB). The cooler is fastened with screws, or threaded mounts, to be more exact. Their position in the retention loops of the brackets can be adjusted to match the right processor socket:

These brackets are screwed on to the base of the cooler. For extra convenience it is better to put the cooler on the desk upside down, place the mainboard on top of it and then tighten the screw-nuts on top of the backplate:

 

This procedure is not really difficult, but mostly rather inconvenient, but the actual retention is extremely secure and presses the cooler very tightly against the CPU.

Since GeminII S524 is so compact at the base and provides 47 mm clearance for the electronic components with tall heatsinks, it won’t ever interfere with voltage regulator parts or DIMMs featuring tall heat-spreaders:

If you install the cooler with the heatpipe ends facing up, one of its sides will go 40 mm past the edge of the mainboard, which is important to keep in mind in small system cases where the PSU is located in the upper part of the case:

However, this distance depends not only on the cooler, but also on the distance between the processor socket and the edge of the mainboard PCB.

The manual doesn’t point out the preferred installation position for GeminII S524, but we did run our traditional preliminary tests  for two possible installations – with the heatpipes going perpendicular to the memory DIMM slots and parallel to them (with the ends of the heatpipes facing up):

It turned out that GeminII S524 efficiency doesn’t depend on the way it is installed on the processor and in both cases the cooler works… but we will get to that a little later. This is what the new Cooler Master GeminII S524 looks like if we replace its default 120 mm fan with a 140 mm Scythe Slip Stream:

I believe we’ve told you enough about our first testing participant, and now let’s spend some time on the second newcomer.

 
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