Hey Plec thanks for that, had no idea. Yes I am using a DP cable but I've had the cad since launch with no problems. It's not that often it does it but will monitor it.
I changed my supplied DELL monitor cable for a 1.2 DP (only a £10) - after researching solutions for my problem and 'belt and braces' - and it did coincide with solving my problem (but i did introduce the HDMI to the secondary monitor about the same time.).What's the difference of the v1.2 DP cable?
Definitely try the HDMI cable (and BIOS GFX update if needed?)Seems to have no signal now on every boot then have to pwoer off by holding power button on case then it boots up fine on second attempt, got a spare HDMI cable so will try that.