Just dropped $43 on three DP to HDMI cables for my workstation rig so I can go to four monitors on a single card.  I was running a GTX 690 with the GTX Titan XP just so I could run DVI for every thing but that was cumbersome to say the least.  I am running three 1440p QNIX monitors (DVI and HDMI inputs) and a Wacom Cintiq 22HD (DVI).  I am not sure if its a problem with the QNIX monitors, GPU, Drivers, or the cables but the monitors just blink on and of in sleep mode it seems.  No display to them.  For some reason though a DP to HDMI adapter and running an HDMI cable works for two of them but not all three.  I have installed the latest drivers for the GTX Titan Xp that I am running.  Any ideas?  Should I just get a new monitor set up?  Not looking to run surround or anything.  Just need to get a stable work station set up running.