ok. problem solved. it was the screensaver that causing me trouble...thank you for the intervention.

As i mention above cgminer crashes after a while. I really do not know what to do. I have done anything. Any suggestions?

Hi everyone. I have a R9 280x sapphire and i mine with 560 hr/s. Can you tell me if this is my best hash rate and if not how can i increase it? Thanks in advance!

Hi everyone. I have a R9 280x sapphire and i mine with 560 hr/s. Is there anyone who can tell me if this is my best hash rate or not how i can increase it? Thanks in advance!