Question My PC blacks out when playing games.

[RandomProgrammer47]

Hi everyone, I recently bought a dell Optiplex 990 DT and decided to install my GTX 750 2 GB GDDR5 GPU and WD 2TB RED HDD from my old pc. The HDD worked perfectly but the GPU was acting very weird, when I'm not doing GPU intensive tasks like game dev or gaming the GPU is at 1-10% like it should be, but whenever I start playing games or doing game dev the GPU usage goes up to 100% and the screen blacks out (without the cursor or task bar) but the pc, keyboard, mouse, keyboard, ect. are still active. I've also noticed a warning sign on PCI Serial Port under Other Devices in the device manager that says:

"The drivers for this device are not installed. (Code 28)

There are no compatible drivers for this device.


To find a driver for this device, click Update Driver."

Someone please help me, my work is very important and I haven't gamed in weeks so I would very much appreciate any help.

 

[Dave8671]

I am just going to say next time get a optiplex MT which use a standard psu. You could get 500 watt in the MT models. The DT any model uses a SSF psu which normally 300 watts. Your GTX 750 requires a 300 watt.

You can grab a 400watt from amazon

New psu

 

[RandomProgrammer47]

Yeah I've been meaning to upgrade my PSU but I don't really fell the need to, because the gtx 750 worked on my optiplex 780 with no issues, I also forgot to mention that on the optiplex 990 the performance is significantly worse than on my optiplex 780.