LCD Monitor signal

I recently bought a brand new LCD 15" monitor. On the first day it went fine, then on the 2nd day it suddently had this annoying problem.

When the CPU Process goes to like high (95-100%), the LCD monitor will start going blank for a second and then turn back on. It doesnt show "No Signal" message but just a black screen.

Ive put it on the lower refresh rate to 60Hz but the problem still arises. Anyone knows?

Sounds power related. Given the CPU uses more power at high loads, it might be that your power supply isn't sufficient enough for the video card, thus the signal loss at 95% and up.

Or you bought a crappy monitor. I dunno..