Question Monitor goes black during games after installing new GPU ?

[DetL]

I just got a new graphics card, the EVGA 1080 ti sc2, but now my middle monitor goes black sometimes when i play games, basically any game whether it's demanding or not.
ive got a 750 watt power supply so it shouldn't be a power thing right? ive installed latest drivers.
monitor blacking out is 1440p 144hz
extra monitors are 1080p and I think 1600x900 both 60hz
pc specs R5 3600, 16gbRAM, x570 mobo, EVGA BQ750 psu, EVGA 1080 ti SC2. I don't run overclocks and I don't have thermal issues
if someone knows what might be happening I would appreciate any help I can get

 

[helpstar]

how did you connect the monitors to the GPU? Try a different cable/adapter/port

 

[DetL]

The one blacking out is connected via DP, i tried a dvi cable and it didnt black screen but it cant run 1440p60 properly, i also had to take down my third monitor since the 1080ti doesnt have 2 dvi

 

[helpstar]

do you still have the former GPU? Check if this happens with this too. If not it could be a contact problem and/or the DP port of the GPU is faulty.
try a different DP cable, plug it tightly

 

[DetL]

do you still have the former GPU? Check if this happens with this too. If not it could be a contact problem and/or the DP port of the GPU is faulty.
try a different DP cable, plug it tightly

It did not do this with my old 760, and I got it working fine only running 2 monitors, I do not have any other DP cables

 

[helpstar]

update the bios of your motherboard

 

[DetL]

update the bios of your motherboard

that didnt seem to change much