Hello, 

Does the system shut down completely or does it restart? Look for a program in your system called "SupportAssist", also known as Alien Autopsy. If you do not have it installed, click here for the download link. This is a system check tool that has several different tests that you can run on different components.

When a computer shuts down completely, this could indicate a possible overheating issue. Try running a video card stress test using the support assist program. Click on the "Checkup" option first, then look for the discrete video card (AMD or Nvidia), click on it and choose the stress test option.  The stress test will display the video card temperature. Let us know what it shows.

Thanks. Yes, the system just shuts down about after 15 seconds into the rendering (either maxwell render or Vray). No restart occurred.

I have done the stress test. Following is the result:

SupportAssist Log File
Wednesday, 29 July 2015 7:41:41 AM
Overall Test Result: Passed

---------------------------------------------------------------------------------------------
AMD Radeon R9 M290X [PCI:1:0:0PCI\VEN_1002&DEV_6801&SUBSYS_05AB1028&REV_00\4&3040A25B&0&0008]
---------------------------------------------------------------------------------------------

Vendor Name: Advanced Micro Devices, Inc. [AMD/ATI]
Interface: PCI Express x16
Negotiated Link Width: x8 (maximum x16)
Video Card Chip Type: AMD Radeon Graphics Processor (0x6801)
Video Card Memory: 4.00 GB
Video Card BIOS: BR44966.006
Driver Provider: Advanced Micro Devices, Inc.
Driver Version: 13.251.3.2000, 1-27-2014

---------------------
GPU : 0 [0_PCI:1:0:0]
---------------------

Temperature: 45 C

Transformation and Lighting Stress Test

Test Started - 29/07/2015 7:30:08 AM

Informative Message: - 29/07/2015 7:35:10 AM
Peak GPU Temperature: 58 C.
Informative Message: - 29/07/2015 7:35:10 AM
Average Frames Per Second 118
Test Finished: - 29/07/2015 7:35:10 AM
Passed

Wireframe Stress Test

Test Started - 29/07/2015 7:35:10 AM

Informative Message: - 29/07/2015 7:40:12 AM
Peak GPU Temperature: 67 C.
Informative Message: - 29/07/2015 7:40:12 AM
Average Frames Per Second 127
Test Finished: - 29/07/2015 7:40:12 AM
Passed

Multiple Rendering DX9 Test

Test Started - 29/07/2015 7:40:12 AM

Informative Message: - 29/07/2015 7:40:53 AM
Peak GPU Temperature: 67 C.
Informative Message: - 29/07/2015 7:40:53 AM
Average Frames Per Second 45
Test Finished: - 29/07/2015 7:40:53 AM
Passed

Product Version: 1.1.6664.10

Thanks

Hello, 

Thank you for confirming this. It appears your system is experiencing an overheating problem, possibly with the video card. If your system is still in warranty, please send me a PM with your service tag for further assistance.