First Build! Shutting off randomly?

[eliebellie]

Hello! I just completed my first build a few days ago and she's been up and running fine so far. I've had this happen twice and I'm just starting to get a bit worried- I've been playing Tera and sometimes it will just shut down and restart with no real indication as to why, just 'System did not shut down properly'. I'm worried maybe its over-heating but I have 4 fans and there's plenty of air flow coming through the back. Could I have something wired incorrectly?

This is my set up:
-APEVIA X-CRUISER2-PK Pink SECC Steel ATX Mid Tower Computer Case
-Seagate Barracuda ST1000DM003 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive
-CORSAIR Vengeance LP 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600
-ASUS P8H77-V LGA 1155 Intel H77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
-Intel Core i5-3450 Ivy Bridge 3.1GHz (3.5GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 2500
-Rosewill Xtreme Series RX850-S-B 850W Continuous @40°C ,80 PLUS Certified, ATX12V v2.2 & EPS12V v2.91
-MSI N660 Ti PE 2GD5/OC GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card

Thank you!

 

[LagerLV]

CPU cooler please?

 

[eliebellie]

CPU cooler please?

Ah its just the heatsink that came with it. Does this help?
This one!

 

[LagerLV]

ok do you have any pictures of your case or something and cooler just sucks i think thats becouse of cooler but show me your case pictures if you can inside!So i see ventilation

EDIT:And soory for no posting 2 days

 

[LagerLV]

Yep thats you coller probably its come in with CPU and this is Ivy bridge architecture CPU which means its gona be much hhotter than sand bridge eaven if it has low Wattage.As i see in google pictures thats case is not the best in ventilation too just download core temp and see what CPU temperature you get and give me results when you do in Load and idle