Hello, I've been searching around for a few weeks now and haven't found a reason for this issue. I got 2 Asus monitors (PB278Q) connected via DP to Mini DP to a MP 6,1 (6 Cores/D700). I bought new cables recently thinking the problem might have been the cables but the problem is still there. My warranty will expire in early November this year. I fear that there is a problem with the mac and I won't be able to replicate the problem in front of the technician since it happens very randomly (half sec partial horizontal flicker in one screen like maybe 3 times a day and 1 sec turn of or lose signal once a week). Things I've tried. Resetting the PRAM and unplugging the machine for 10 seconds. The problem still there. Any body got experience with this?