Fast report since I don't have currently time for proper testing;

If I use UI I can't get to 1,3GHz with default voltages, eg. when touching only the cpu speed slider, and my phone crashes.

If I just
echo 1400000000 1375000 > /proc/opptimizer
it still seems solid and I can't get my phone crashing with normal use. I used conky to check the cpu speed.

Is there a way to run the mandelbrot test from command line?