Sonnet + GTX980 problem

[MarkKiss]

Hi, I have MBPr 2014 + Sonnet Echo TB Box + 450W PSU 

I was using with GTX770 and no problem 

I powered box card fan start spinning plug TB cable to MacBook and power Mac all fine 

 

I recently swap GTX770 to GTX980, but when i switch power to box (GTX980 do nothing) once I have plugged TB cable and power MAC Once I power MB - MB send signal to start box and card is alive (LED + FAN) but I see just black screen no boot screen no chine ( I try hold ALT nothing happen, reset PRAM etc etc.) If I will start to OSX with box switched OFF OSX will start fine, Power On and I use https://github.com/goalque/automate-eGPU script detect GTX980 make all mods, but with reboot card go for second off and start with MB but again just black screen no chime.

 

I think so i need " start " card first same as started GTX770 but I dont know how

 

If I remove card OSX start fine