Subzero behavior

Onto the subzero test results, which are after all, the most important ones. For these tests, we increase the load of the processor by increasing the frequency and voltage to 4.5GHz and 1.7v. Next loaded up Wprime 1024M on all 4 cores to generate a heat load.

• 200x22,5 = 4,5GHz
  
• +400mV = 1.7v
  
• Idle = Windows desktop
  
• Load = Wprime 1024M
  
• CPU temperature read-out with the DFI Smart ITE Smart Guardian (verified with Speedfan)
  
• Base temperature read-out with Fluke 51 II

This is pretty much what we expect from the containers in a situation where there's no cooling liquid and the setup idles: the Dragon F1 is able to keep the increase of the temperature within a closer range than the custom container does.



Running Wprime on all four cores having no liquid nitrogen being poured into the container is a pretty difficult situation for the containers. The custom container is not at all capable of keeping the system running: after about 60 seconds, the setup shuts down because of heat related stability issues. The Dragon F1 is capable of running almost 5 minutes, but eventually shuts down as well before the 5 minutes mark.

Now time for the real deal, let’s pour some LN2 in the containers:



This test is pretty interesting. In a situation where the processor is heavily stressed, but we keep the container filled with liquid nitrogen at all times, both containers perform pretty much the same. This indicates that this custom container is quite capable of handling a Phenom II, or other high-end processors.