None of my 6 miners show a performance of 441 Gh/s at the pool (438.44, 422.08, 413.11, 411.2, 389, 382.51). The working temperature of the webgui shows about 40 degrees, does anybody can offer some help how I can increase the performance (read something about restarting cgminer)?
Depending on your PSU, (recommend 600W at least for a single miner) and all 4 PCIe power plugs used, you can overclock it a little bit. Search this thread with Overclock and you will the instructions to do that...but just the same SSH into your miner and edit the /etc/config/asic-freq file. If you are comfortable with a linux command line this should be easy. Otherwise follow the instructions in the post after searching
dogie says with 1 CX750M you can run 2 S3
I am running 2 S3s with stock clocks on a CX750M with no problems.