As some of you probably know already, there is a light-weight version of XBMC for the Pi called XBian (http://xbian.org/
) and it overclocks the Pi by default to arm_freq=840 and core_freq=375 (default being arm_freq=700 , core_freq=250). Now I was wondering, does this shorten the lifespan of the Raspberry Pi significantly without ventilation? I have no ways to measure the actual temperatures and I've never overclocked anything on my own, so Im fairly new to this.
I was thinking of buying a 30mm case-fan and soldering it into a USB-wire, so I could plug it into an USB-hub when playing XBian for extended periods of time. I'll be getting a Pibow case in the near future, so there is no way to make this a permanent solution (I'll just have to put the fan on top of the ventilation holes).
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Tl;Dr arm_freq=700 , core_freq=250 > arm_freq=840 , core_freq=375 - Is cooling necessary?