new build computer booting concern

I recently built a new PC however when i power it on for the first time after PSU has been turned off it starts up after a second or 2, powers back off and after another couple of seconds powers back on. Could anyone confirm if this is a POST?

No issues with Restarts or turning off and on while PSU is set to on in between start ups.  see below for details

i74790k - CPU
Corsair  H80i GT - Cooling
Asus Maximus VII Ranger - Mobo
Corsair vengance 16GB ( 2 x 8GB in Black MoBo slots) - RAM
Corsair HX750i - PSU
WD 500gb - HDD
2x Corsair 120mm fans on front (intake)
2x Corsair 120mm fans on top (Exhaust) - one fan is plugged into CPU_OPT

Any advise would be great! Thanks!
Nathan LindleyIT Support EngineerAsked:
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I've noticed some computer when you plug them in (or turn it on) for the first time it sort of "powers up" but it sort of just powers everything for a few seconds, then either will actually turn on or then you can press the power button. I'm not sure if it's a test or not, but I've encountered a few that are like that.

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It could be a bad power supply, or a short in one of the power cables or connectors.  Try removing as much as hardware possible, to test just the power supply with system board, CPU, & minimum amount of memory.
Nathan LindleyIT Support EngineerAuthor Commented:
Thanks, just wanted another opinion on this, I also checked with the manual for this model of motherboard, pretty sure it's normal behaviour
It's pretty standard for some motherboards.
There is a ton of post on that problem. You can ignore it or, you can try to update your BIOS.
ASUS forum
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