Display not responding EVGA GTX 660 TI

[IAMUNDEAD]

My computer hardware was swapped to a new case. So my noctua cpu cooler would fit in it. After putting everything back in the new case, the gpu isn't showing the display, but it's running. It was working fine earlier today in my other case. I have tried using an hdmi cable, dvi cable, a different monitor, but nothing has worked. All of my hardware besides my gpu and Psu are new. I have a gtx 660 ti and an 600w corsair psu. Also, the new case is mATX compatible and my motherboard is mATX (dell 88dt1) Lastly the power button won't turn off the computer, it will only turn it on and all of fans are running when booting up.

[Riv]

Try using a different GPU and see if you get a signal, or maybe plugging your monitor into your motherboard directly (that is if your CPU has an onboard graphics processor) If either of these give you a signal on the monitor, it might be a dead card. The 660 Ti is old tech and in a really hot environment it could easily die in 3-4 years.

[IAMUNDEAD]

Yea, because when I got the dell last month when i put the gpu it started having problems with it nt responding. It eventually started working for a couple weeks then I switched cases. Also twice a game I was playing I think my gpu was overheating. It said 100 degrees Celsius so, I think I'm going to get a gpu. I was considering a 960 because I prefer Nvidia cards better.