I have already written a post where the cards to ~2450 H/s create, but was not paid attention to the power consumption!
I've been trying to achieve maximum performance here.

Here are the settings:

Topic SRB high performance: (without thinking about power consumption)
https://drive.google.com/file/d/1AiuqbS6gbPW6IsT7p8QmgB6GrfIphHzB/view?usp=sharing

OverdrivnTool-Values:
https://drive.google.com/file/d/1ydngQu040cwMsyW8gdJVLLJI52gH8fIj/view?usp=sharing

You can still try between: 1680Mhz/1000 or 1690Mhz/1000.

I am at your disposal for questions.

greetings
Patrick  

https://drive.google.com/open?id=1E0W1XSJ0ktY61I35wBWLL1KO6FqZ6PdW

If you get a "Error CL_MEM_OBJECT_ALLOCATION_FAILURE" try increase virtual memory in windows.
Go with number of GPU's * 8gb + 8 , for example 6gpu * 8gb + 8 = 56gb virtual memory.

I have try to increase virtual memory in Windows as you say.
But nothing change, the error is always here..

What can I do now ? What do you need ?