Computer Freezing Please Help

[batjitsu]

Lately my computer as be Freezing on me when I play games so I change out my graphics card with my old one gtx 670 and it stopped so I sent back my 780 and got a replacement and when I switched back to the new 780 it still freezes on me i thought it might be my psu so i put it in with my gpu and Psu in my brothers computer and it ran fine bother computer specs are Mobo,z68x-ud3h-b3. Cpu I7 2600k. 4gb ram. With my HX 750 and Gtx 780

My pc specs Mobo,Asus Maximus Hero. Cpu I7 4770k. GPU gtx 780. 8gb ram. Psu HX 750 Someone please help

 

[jmacavali]

What size power supply does he have?

Do you have the right pins on your power supply to plug it in?

780 Ti needs 1x8 pin + 1x6 pin power