What frequency are you running them at? If I recall correctly 800 MHz is default. Also have to keep it in powers of 2 on diff frequency. So maybe try 780 or less and see if it will stay alive. Also I you have a raspi burn an image of minera onto sdcard hook blades to the pi. Then you have full mining solution. I have found that my 24mhs gridtowers run best with cpuminer with scrypt support
Br
The setup was "gridseed:clock=850" , I will try 780 and check the difference.
I heard about raspi, so I just bought one and waiting for delivery.
Thank you @d57heinz ;-)
or maybe its your software. i use cgminer 4.3.5-scrypt.2-gridseed
I will try with this version to compare.
Thanks for the advice @sirslayer.
LINK:
https://github.com/dmaxl/cgminer/releases