is my MB dying ?

[matrix0077]

hi i have been having some really weird problems with my pc for about a month and i don't seem to figure out the answer to my problem.It all started when my pc was randomly shutting off my screen and at the same time crippling lot of system inputs and outputs including not being able to self shutdown by pressing the power button just once not being able to change numlock and capslock while sound not being hurt at all it seems to be super random and it doesn't seem to be triggered by any specific action i figured that my RAM must be causing this because i have it in the secondary slot since i have only 1 8GB stick so i put my RAM back into the primary slot and the problem went away for about a week and half. recently i got new speakers first day nothing happened but second day the same thing happened again with screen shutting off my speakers still playing my music my keyboard not responding to anything and my power button not being able to shut down pc with just single press i had to hold it down for hard power cut also i noticed that when i removed my side panel on my pc one of the ventilators went on full power since so many things get crippled and screwed up im pretty sure it is MB or maybe power supply ? it is really hard to diagnose since it happens so randomly.

really glad for any help

SPECS:Ram:Kingston HyperX Blu 8GB / DDR3 1600Hz / CL10-10-10
Case:EUROCASE ML X802 Gaming / ATX
GPU:Sapphire DUAL-X R9 280X OC 3GB
Power source:FSP Fortron 550W / 80PLUS
HDD:Seagate Barracuda 7200.14 1TB / 3.5" / 7 200 rpm
SSD:Samsung 840 EVO 120GB / SSD / 2.5" / SATA III
CPU:Intel Core i5-4570 3.20 GHz / 4 core / 6MB cache
MB:Gigabyte Z87P-D3 / Intel Z87 / DDR3 / PCIe 3.0 / SATA

 

[photonboy]

I'd start by running MEMTEST www.memtest.org

Full pass. may need to change BIOS boot order