My colleague Alex wrote about winter in Hong Kong in an earlier blog post - and it's already over again. Temperatures have been on the rise from mild winter temperatures of 18°C for more than a month already, but today it came in the radio that we're at 28° Celsius (82.4° Fahrenheit) and a whopping 95% relative humidity. This compared to the snow chaos in Europe with airports shutting down just a few days ago in the middle of March... Guess it's quite obvious why we moved to Hong Kong - I was at the beach yesterday, basking in the sun!

Maybe one should draft up a new PUE (Power Usage Efficiency) metric for data centers and supercomputers which is relative to the annual temperature and humidity average of the respective location - just like "relative humidity" in relation to temperature. It's no surprise that Hong Kong's average PUE is at 2.52 according to Digital Realty's 2012 survey on 101 major data centers in Hong Kong. I wonder what lower PUE than the current 1.02 Immersion-1 would achieve with such a new "relative PUE" metric...