new computer shutting down 10minutes-1hour when playing games

[FLZ]

hi, i recently built a new computer and it shuts down as soon as i start to play games for a while. so far it has shut down while playing metro: last light, and far cry 3

the event log says these 3 things i find to be possibly relevant

Spoiler

The description for Event ID 0 from source NVNetworkService cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event:

NVNetworkService
NetworkService in OnStart


The Windows Management Instrumentation service has detected an inconsistent system shutdown.


The winlogon notification subscriber <SessionEnv> was unavailable to handle a critical notification event.

fixes i have already tried include updating my motherboards bios and removing the nvidia shield streaming
i havent dont any overclocking yet

my pc's bios are:
motherboard:ASUS MAXIMUS VI HERO
cpu: intel i7 4770k
gpu:ASUS GTX 780 3GB
ram: TEAM VULCAN 4gb(x2) DDR3 2400 RAM
psu:Antec HCG M HCG-850M 850W ATX12V SLI Ready CrossFire Certified 80 PLUS BRONZE Certified Modular Active PFC Power Supply
os:windows 8.1

thank you

 

[popatim]

Step 1 is to remove all overclocks & CPU/Chipset Voltage increases.
You have some high speed ram, are they at the required voltage to operate properly?

 

[FLZ]

Step 1 is to remove all overclocks & CPU/Chipset Voltage increases.
You have some high speed ram, are they at the required voltage to operate properly?

how would i go about checking the voltage going to my ram.

all the overclocks and any adjustments are default as in stock

 

[FLZ]

please help

open hardware monitor only shows voltage on my cpu and lists the ram as "generic ram"

 

[FLZ]

bump. could it be a overheating problem or something?