If not, pull the graphics card and run it with that load. If it works fine, you could have a marginal PS for the system. It does appear that your PC is designed to OC. For problems with those system, stock settings are a good thing to try. My first thought when hearing of your symptoms was bad capacitors but yours appears to be too new for that.
Hello. I've had this same problem since I built my build 2 years ago. I tried to google it and fix it plenty of times, and deciphered that it's probably a problem with either the PSU, mobo, or CPU. Basically every time I switch on my computer the fans spin up as though its going to start then cuts out, does this for random amounts of time, could do it twice, could do it 50 times, before booting. I could never fix it so I just left it be, but I last night just had a HDD failure and SSD failure at the same time (I think it may be due to this problem, perhaps?) anyways, I'd like to determine what is causing this constant cutting out. Here's a video for reference (Nothing appears on the monitor not even the mobo logo)
https://www.youtube.com/watch?v=on3_QgYYmw0&feature=youtu.be
Specs:
CPU - Intel i7-4790K Quad Core 4GHz
GPU - MSI GTX 970
MOBO - Gigabyte Z97M-D3H
RAM - Corsair Vengeance Pro 8GB
PSU - SuperFlower Golden Green HX 550W
HDD - Western Digital 2TB
SSD - Crucial MX100 256 GB

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