Is the rest of your computer on? What power supply do you have? Sounds like you overloaded your power supply unit and it shut the hole computer down.

Put in your old graphics card and see if it works. If it does try the 780ti one last time and if still nothing then you will have to rma the card.

Please post your computers specs so we can help you better.

my spec
core i7 4770k
evga 780 ti sc acx
corsair h100i liquid coolr
corsair HX 850 watt powre supply
 16 gb ram from corsair vengence 
Z87 GD 45 from MSi 
the case  cooler master storm trooper

Did your old graphics card work?

it work fine 

wait a min  my local friend give me advise i did it , it is i remove my evga gpu and i use the motherboard  gpu and it is the same state that mean my gpu  is fine  , and that mean problem from other thing ?

No my friend same to my new gpu I also tried the gpu of intel on the motherboard but same problem that mean not from my gpus it seems from otherthing....what do you think?

I mean it work fine in my old desktop

 
So let me get this straight. You tried the card that's not working in another computer, and it worked in that one?

Ok lets clear this up
1. Is the GTX 780 TI working in your main computer your on now?
 
2. Is it working in a different PC?
 
3. Is your old video card working in your system that your on now?
 
4. Does your old video card work in a different PC?
 
 
 
5. If the GTX 780 TI is not working in any pc then its time to RMA it, First did you register it with EVGA yet? Where did you purchase it? Lets take it all from there, and sort this all out.

donta1979
Ok lets clear this up
1. Is the GTX 780 TI working in your main computer your on now?
 
2. Is it working in a different PC?
 
3. Is your old video card working in your system that your on now?
 
4. Does your old video card work in a different PC?
 
 
 
5. If the GTX 780 TI is not working in any pc then its time to RMA it, First did you register it with EVGA yet? Where did you purchase it? Lets take it all from there, and sort this all out.

first i can't reach the bios when i press the power button   only the case fans and liquid cooler fans turn on  and no  vision in the screen only black picture  it is says no dvi signal i tried on both  the gpu that come with the motherboard  from intel  on the board msi  z87 Gd 45 and same state  and yes i did  try my old gpu not working also  all gpu not spinning i consider that this is not from gpus  i am sure or kinda maybe from the power supply ..... i purchased it 18 mars  and from amazon   by 730 dollar reached me in 6 days from 18 mars i didn't set up when it reached cuz i didn't buy the cooler master case yet .... and this is my story after i  played bf 4 single player   the screen went off  :'(

Yes then it may very well be your power supply, but first check all connections, from the 24 pin and the cpu's 8 pin. Make sure they are all in secure. If it is doing it on multiple computers both cards, it is very possible the psu had massive failure, to the point it is killing hardware. I would check all connections on your setup first, take out your bios battery on the motherboard as well for about 1-5 minutes, unplug the power from the rear of your pc while you do this. If its a bios issue this should reset it back to stock. That is the first thing you should do, but both your video cards doing the same thing on different hardware does not look good.
 

donta1979
Yes then it may very well be your power supply, but first check all connections, from the 24 pin and the cpu's 8 pin. Make sure they are all in secure. If it is doing it on multiple computers both cards, it is very possible the psu had massive failure, to the point it is killing hardware. I would check all connections on your setup first, take out your bios battery on the motherboard as well for about 1-5 minutes, unplug the power from the rear of your pc while you do this. If its a bios issue this should reset it back to stock. That is the first thing you should do, but both your video cards doing the same thing on different hardware does not look good.
 

ok i will try the 2 method now  remove CMOS battery and  try   to see if there is bios  screen or not  i think this motherboard doesn't support beep  cuz it has no speaker 

Ahmed.Almajdob
i am sorry  for my self that i bought garbage MSI Z87 GD45 for my 3000 dollar build !
 

Sometimes we learn the hard way. It's ok. Live and learn. I know that Evga products have awesome support, and products.