Black Screen Flicker

[Link Xavier]

Hi, I recently change a new GPU (GTX 750ti) and it seem to function ok but occasionally the monitor will flicker into black screen for less than quarter of a second & back. Apparently it tends to happens when someone adjust the switches of the fans around the house.

I was told that I might need a UPS or surge protector... but unsure if a surge protector will work on such a problem.

Addition to the problem is that the MSI GTX 750ti (PCI-E 3) draw power from the Motherboard, not from the PSU... and my MB is much older (PCI-E 2), and the system is already connected via 2 4-ways extension board.

Will switching to a something like a 12 outlet surge protector help?

 

[zkid]

What is your PSU brand and wattage?

 

[Link Xavier]

What is your PSU brand and wattage?

Seasonic X-Series 760W & it's not a new one either... I have to change GPU because my old one failed.

 

[Link Xavier]

Please help

Ok... further observation to the problem, it's not really the fans, or at least not just. It doesn't always happen and I am uncertain what cause the issue.

The most recent occurrence was tonight, when I have my external hdd connect. Due to so stupidity, I have to re-plug the USB and I saw a small spark just as the front port & the usb connect. Same black screen issue...

The power to the system just seem unstable... and it's really scary. And I really do not know what to do.