As written earlier, mining with the HOdlMiner can speed up your Hashes per Second on the ROICoin Network - mine jumped up from 250 to 300 H/s - not much but hey
Now I found an even better version: Hodlminer-Optiminer - with this version I am mining with up to 700 Hashes per Second on my i7-4770 - that is amazing!
I am mining to CoinsPool
I wish you good luck, mining ROICoin!