I understand what you are saying.
The Tornado has more than twice the RPM at +12v.
But the CFM at +5v is more than enough to dissipate the heat.
I know this because I have combined the Tornado with many different aftermarket heatsinks and recorded the changes in temperature.
The Tornado has more than twice the RPM at +12v.
But the CFM at +5v is more than enough to dissipate the heat.
I know this because I have combined the Tornado with many different aftermarket heatsinks and recorded the changes in temperature.