Hello, Phil.For clarity and to avoid any possible confusion, a computer has not booted until the user is in a fully working OS such as Windows.
With the above in mind it is possible that the MB is failing the power on self test ( POST ).
What is the exact model name or number of the 750W Corsair PSU and is it out of the box new.
Do you have the keyboard connected to one of the black USB 2.0 ports.
I concur with Peter regarding the replacement MB needing a BIOS update and likewise we need to know the RAM details.
You are right, I should have invested time in finding the right terminology and write more accurately.
I guess, "Once again the PC will not power up when the GPU is connected to PSU" would fit better.
The PSU is CORSAIR CX-M Series CX750M 80 PLUS BRONZE and is not out of the box new, but I can say
I got it from a reliable source, since I know him personally. I'm pretty sure it's a faultless device.
I have no keyboard connected.
About the Q-flash, I've never done it before, but it should be pretty straight forward process as i read.
So, i download the latest bios for the board, format USB flash in FAT32, extract the bios onto the flash,
strip everything out that i can from the board, power up the board, insert the flash with the latest bios
in usb port next to the q-flash button, press it for a couple seconds and that should do it, right?
I read something about renaming the BIOS file itself for GIGABYTE boards, is that necessary?
Please correct me if any of the steps are wrong.