another instance of cgminer @ 150 Mhz.
Now I have one cgminer running 2Pac@275, 2 Compacs @250 and second cgminer running one 2Pac@150 - so far so good...
How does run multiple instances of cgminer and set different frequencies? All my USB ASICs detect on all the instances. If I disable ASIC on the first instance, the second instance I fire up also shows the ASIC as disabled too. So, I'm not sure how you configured your setup to run different frequencies. Can you help me and provide some details?