MSI Titanium GTX 1070 ti power issue?

[ArcAnik]

Recently I bought msi titanium gtx 1070 ti. I have a cooler master 450w 80+ bronze powering my whole system with a core i7 4790, an ssd, an hdd and 4X2 gskill ripjaws 1600mhz ram. The gpu fans don't spin while it is on idle(that's normal I know). The issue I'm facing is, every time, when I try to run a heavy game or benchmark tool, which make the gpu fans bump. And when the fan kicks on at a high speed the display went off. I hear a hardware remove sound. PC stays running but display goes off. Could it be power supply problem or is it the gpu? (It's a 4month used gpu and it's condition seem mint, I tested it on his(the guy from whom I bought) system and it was running fine. He has a 750w Corsair psu. And if so suggest me a good power supply unit. Thanks