Hello,

I have had this computer for a LITTLE while and the graphics card was very bad and old (NVS 700, I think).
I want to upgrade to the Geforce GTX 780 TI but what I want to know is, will my computer be able to handle it and will it be balanced?

My CPU is Intel I7 - 3770k 3.4GHZ and my PSU is only 350 watts (I believe).

The new GPU requires 500 watts, if I were to GET a new PSU would I need to CHANGE anything? I don't want my computer to blow up. 

I just want to know if this GPU will work well with my processor, thanks.It will work with your CPU fine but YES, you will need a new power supply.  Something in the 550w to 650w range would be ideal from a decent brand such as XFX, Seasonic, Corsair (avoid the VS line), EVGA (G2 or B2 lines).etc.I just extreme outer PSU calculator (http://extreme.outervision.com/PSUEngine) for the two basic elements of your system (CPU  and graphics card) and I got 405 W minimum, recommended 455W, which means that I'd get something in the range SUGGESTED by camerongray.

You aren't going to damage anything by using an overpowered PSU [except your wallet] unless something is defective because your system won't take more than needs from the PSU even if the PSU can deliver more.  Check that your case will have enough room in it to take the PSU.  I have PSU's that wouldn't fit properly because of overlapping ridges eg around the mains I/P with cut-out in the case, and also my case has a shelf above the PSU which prevents the holes in some PSU's lining up with those in the case etc, etc.  If you can, get an engineering drawing of the PSU and verify that against your case.

Dumb_Question
22.July.2015