Sorry in advance if this is a duplicate - I see similar threads here, but not with these exact circumstances.
I have a Dell XPS 8700 that came with a GTX 745 card.
I bought an MSI GTX 960 Gaming 4G as an affordable upgrade, but upon installation I have a blank screen via both the monitor output and HDMI 2nd screen I was using before.
-I am reasonably certain the board is fully seated, as there is really no physical way for it to be 'in' any further.
-The logo on the card lights up (LED) and both fans spin initially upon startup, then wind down and stop.
-The 8-pin power cable is installed, but I needed the 6/8 adapter cable provided with the card.
Here is a pic of the power supply label for reference:
(link provided, since thumbnail is too small to read)
http://vignette4.wikia.nocookie.net/xd1/images/c/c3/20160320_210758.jpg
Also, since I am new at this, what is this 'slot' for, and is not having it connected to anything part/all of my issue?
Thanks for any help, I was really hoping this would be a smooth install, but that never happens for me.
I have a Dell XPS 8700 that came with a GTX 745 card.
I bought an MSI GTX 960 Gaming 4G as an affordable upgrade, but upon installation I have a blank screen via both the monitor output and HDMI 2nd screen I was using before.
-I am reasonably certain the board is fully seated, as there is really no physical way for it to be 'in' any further.
-The logo on the card lights up (LED) and both fans spin initially upon startup, then wind down and stop.
-The 8-pin power cable is installed, but I needed the 6/8 adapter cable provided with the card.
Here is a pic of the power supply label for reference:
(link provided, since thumbnail is too small to read)
http://vignette4.wikia.nocookie.net/xd1/images/c/c3/20160320_210758.jpg
Also, since I am new at this, what is this 'slot' for, and is not having it connected to anything part/all of my issue?

Thanks for any help, I was really hoping this would be a smooth install, but that never happens for me.