I've found my problem on this firmware
One of moded miner's chip doesn't work.(GC3355 #1)
That's why, I got 410K @1200Mz
I compared with win7(cgminer) on pool(ltc.ghash.io) side.
win7 hash rate is 70K more.
cgminer shows almost 490K @1150Mz
v3e shows almost 390K @1150hz

Some has any idea? or recommend fix this problem