As EPC is using Scrypt algo, it doesn't make any sence to mine it using a GPU. Your electricity will cost much more than you could gain by mining. Scrypt mining is dominated by ASICs since long ago.
In short - if you don't have Scrypt ASIC, don't bother mining Scrypt at home. You would better buy coins from market, or rent hashing power from Nicehash (could be an overkill for now) or MRR (this more sensible option, as you could rent less powerful rigs).
ok thanks, i wanna try rent rig, but do you know where we can pool mining epc coin ??
See this:
https://prohashing.com/explorer/Experiencecoin/
How to Mine
prohashing.com:3333, password "c=Experiencecoin"