The heatpipes are positioned non-linearly inside the heatsink: two side heatpipes are a little above the middle pair:

The gap between the 8-mm heatpipes in the cooler base is 1.5mm and filled with aluminum:

The base surface is very even and finished in a manner typical for HDT-bases: moderately smooth without any polishing.

We use four shock absorbent silicon spindles (the fifth one must be a replacement one) to install a 92-mm fan onto the Cobra heatsink:

The fan rotation speed is PWM controlled from 1200 to 2800RPM. The claimed airflow is 39-54.6CFM while the noise is promised to stay within 20-28dBA. The fan uses a rifle bearing with 50,000 hours or 5.7 years of non-stop operation time before failure.

The fan consumes maximum 3.6W of power at 0.3A electrical current.

XIGMATEK Cobra is designed for contemporary Intel and AMD processors for Socket LGA 775 and Socket 754/939/940/AM2(+)/AM3, respectively. All retention components are fairly simple and pretty reliable (for this particular cooler):

Too bad the new cooler is not yet compatible with the LGA1366 platform. However, XIGMATEK has already solved this problem, which we are going to dwell on later in our today’s article.

There is no mention about the preferable XIGMATEK Cobra cooler positioning during installation, neither in the enclosed manual, nor on XIGMATEK’s official web-site. That is why I checked out the dependence of cooling efficiency on the solution orientation on my own. It turned out that when the cooler is installed with the ends of its heatpipes facing up:

…it cools the CPU 3°C better under maximum load than when the heatpipes are directed horizontally. We have already seen top-coolers demonstrate the same dependence in tower-cases (the most recent example is Scythe Kabuto).

In conclusion I would like to add that the recommended price of XIGMATEK Cobra cooler is $27.