reaper7534 wrote in post #18375640
Are the monitors your having issues with right now DisplayPort monitors ? If so, not all cables are created equal. Some cables have Pin 20 connected which it should not be. It caused problems and would not let my computer come out of sleep mode if I did a soft shutdown.
Mate had this issue, but it wasn't consistent, sometimes it would shut down, sometimes it wouldn't start up, sometimes it was fine.
Eventually I found a pin out diagram for DP and put a test light on each of them, found pin 20 was connected on a cheap cable he had bought.
Found a single web page with reference to it as well, but have since found a few other forum posts scattered around that show it is a consistent but poorly understood issue.
starlights wrote in post #18375635
Thanks for confirming what i suspected (Groan). Anyway, I needed to update my GPU anyway because i wanted to DP ports but the GTX 480 only offered HDMI and DVI. I am hoping the DP ports will bring some improvement with my dual 2515 setup.
On another note, ever since i upgraded to the two Dell monitors i don't get to see my Bios screen anymore. Goes straight to the login screen after some time. To test, I removed the Dells and reconnected my older monitor and I could see the Bios screen on boot up. Normally this isn't a problem, but will be if there is a startup problem or if i need to access bios screen to change any settings - any ideas? (Tried different cables as well)
I've run two Dell 2412 next to each other, one on DP and the other on VGA. There is NO difference between them in terms of image quality.
DP is only really an advantage if running 4k or high res, need very high refresh rates, or have a full 10bit work flow (GPU, Software and Monitor).