No display after upgrading to GTX 560 Ti

[catigax]

Hello guys. I bought a new graphics card, a new psu and new memory cards.

I installed them all correctly on the mainboard. But when i try to boot, the fans are spinning but the monitor says no signal.

here is my system: amd phenom ii x4 965 cpu
evga gtx 560 ti graphics card
corsair 2x4gb 1600mhz memory card
cooler master gx 750w psu
Asus m4a77td mainboard

What should i do? Please help me.
i do not own the old graphics card anymore.

 

[Tmagic650]

Is the Corsair memory DDR3 type

 

[andy06shake]

Does the pc beep twice?(this can indicate memory incompatability) Try only one memory module and see if it will boot.