System Type: 1 physical CPU
Motherboard: Regular - Desktop
CPU Socket: Not Sure - Show All CPUs
CPU: AMD FX-6300 3500 MHz Vishera
CPU Utilization (TDP): 90% TDP
RAM: 2 Modules DDR3 SDRAM
Video Card 1: AMD Radeon R7 240
ATTENTION: FOR PERSONAL, NON-COMMERCIAL USE ONLY
Fans...
Yes, you are fine. The 760 requires minimum 500 Watt and your processor will have more than enough power.
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-760/specifications
Yes, the fans should spin. If they are not you may have a faulty PSU and need to get an RMA but still doesnt have enough power for your 770. If its new i would recommend shipping it back and get a refund and get a high watt psu.