Very slow boot time with new graphics card

[deadagain1]

Hi all,
I am having a bit of an issue with my new card. Bought the Asus GTX 980Ti oc Strix and hooked it up. The card itself works fine but now my pc bootup time has gone from a few seconds to over a minute (most of that time is spent after a 'no signal, message on the monitor) eventually everthing kicks in and works fine.
I have uninstalled all the software (drivers etc) and updated to the latest version(s) but nothing changed. I have removed and reinstalled the card, still no change. Tried changing the streamservice to automatic delayed, still no change. Reinstalled my older GTX680 and everything works properly.
Setup consists of :-

Fractal designes 750 Edison PSU
Intel core i7 @3.75GHz
8 GB ram
GigaByte GA-Z77X-UD5H
Intel SSD 535 series 480Gb

Does anyone have any suggestions?

Thank You in advance

Dead*

 

[Dash RipRock]

Almost certainly motherboard bios update required,suffered the same problem with my gigabyte x79-up4 when moving from a gtx 670 to a gtx980 18 months ago.

 

[Jarrastafari]

Got all the PCI-E power cables plugged into it?

 

[deadagain1]

@ Dash RipRock,
Thanks, i shall try updating the bios and see if it helps.

@ Jarrastfari,
Yes, got all the power cables plugged in.

Thank You to both

 

[p5ychonaut]

I had this same problem recently on Windows 10 and I tried many things to no avail (changing driver versions, messing with services, motherboard already had latest bios etc). A recent Windows update appears to have fixed it though. Still have no idea what caused it.