NERDYCSGO :
Acapella :
That tends to be a symptom of a faulty motherboard. Though, it could also be the power supply. What model supply do you have?
I have a Generic 500w Psu that came with the case, it has no brand
Houston, we found the problem.
That Generic "500w" unit will likely struggle to power your system with a 750ti.
Bottom line: buy a real power supply ASAP because that scrap piece of metal in the PSU compartment is built with such low quality that it will fry all of your parts with even the 300w demand your system has.