RE: Alienware 18 with dual AMD 290x connected to Asus pb287q 4k monitor goes on and off -unusable
Question. Why do you have a mini DP to hdmi when the monitors have a display port port? I think when the rep asked if you used the display port, she meant no HDMI, just display port.
So, have you tried mini DP to DP? As well, you don't really want 4K at 30 Hz as 60 Hz is preferable. That's more of a monitor limitation rather than a computer limitation (see here).
Currently owned computers:
AW13 R2 | i7-6500U | GTX 960m 4 GB + GA (R9 285 2 GB / RX 480 8 GB) | 16 GB 1600 MHz | 1800p Touchscreen | 2 x 500 GB SATA M.2 | Graphics Amplifier Performance Analysis with 13 R1
Desktop | i7-3770 | GTX 980 4 GB | 16 GB 1600 MHz | 120 GB mSATA + 960 GB SSD + 2 TB HDD | 600w PSU
Formerly owned computers:
HP Pavilion 15-n280us (given away) | Apple Mac Mini 2012 (sold) | m15x (damaged mobo) | 13 R1 (death by unknown) | m14xR2 (Tradied In)