Imporving my mining

[or.karlinsky]

Hi,

I have a SAPPHIRE HD 7870 GHz Edition OC 2GB GDDR5 (http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1160&pid=1487&psn=&lid=1&leg=0).

My settings right now are:
OC
---
GPU 910MHz
MEMORY 1375

cgminer
---------
i 19
thread-cocurrency 16064
g 1
w 256

Temprature - 68C

Right now I am getting about 389Kh/s and I don't succeed in improving it.

Does anyone have any suggestions for improving it? I want at least 400Kh/s

Thanks in advance!