GPU not working after case change

I had my machine in a Cooler Master ATX mid tower for the better part of two years with no problems at all. I recently got a NZXT Phantom ATX full tower to accomodate more hdd and what ever else I plan to put in there in the future. Case is awesome! A lot of fans, keeps my mess cool. Now I moved everything in, plugged it in the same way (I took pictures so I could match it exactly lol) and when I power up the machine, all LEDs run, the fans run, the mobo's lights turn on, I could hear the HDDs spin I heard that like clicking sound computers make when the processor is all busy working and stuff. Problem is that even though I have my monitor plugged into the GPU (EVGA Nvidia GTX 260), it doesn't receive a signal. It's almost as if I don't have the monitor connected.

I have two monitors I tried. The one, an old Dell monitor, doesn't even say it's looking for a signal, the screen just remains off. When I used my other monitor, a 24" Samsung hd TOC, it would show a "check the signal" every time I unplugged the DVI cable from the GPU while the machine was powered. So I guess that's something but still, the fact of the matter is that I cam getting no response when I turn on the machine.

I read that if you pulled out the RAM and the HDD, the computer should beep when powered up but I heard nothing (I have speakers plugged in along with a little speaker connected directly to the mobo). I was also told that if I heard a long beep followed by some short beeps, then it's an issue with the GPU but I haven't heard any beeping what so ever.

Any ideas as to what I did/ what component is not doing its job?