My work system specs are as follows:
Windows 7 64bit, Blender v2.71 64bit
Intel Core i7-4770K @ 3.50GHz
Nvidia GeForce GTX 770
I have been using blender for some time, but always encounter a problem on this machine with rendering in cycles. The system is prone to crashing on cycles renders after the first few tiles have rendered. I am using GPU CUDA rendering to make the most of the hardware available, but the crashes happen unless I set the tile-size to 32 x 32 or smaller. At 64 x 64 it will crash within minutes, and at 128 + it’s almost immediate, like after the first 3 or 4 tiles.
Setting tile size to 32 x 32 allows me to render, but I know this is not an efficient method. I have done tests and when lucky, a 128 x 128 tile render will complete and be MUCH quicker than 32 x 32.
I can’t find anything in windows event viewer regarding the crash, but the whole system stops, I get a gray screen and it does not recover. I have to manually reboot.
Things I’ve tried include:
Rollback/change drivers for the graphics card.
Update Chipset drivers
Update Blender (this has been an issue for the past few versions for me)
Underclocking GPU (I can’t be certain this seems to add stability, but ultimately the same issue occurs eventually)
Other things to note:
CPU rendering works fine.
This is not a gaming machine - I’m not usually stressing the GPU unless I’m doing these renders so a fault with the GPU is possible, I’m going to work on testing this theory with other stress tests.
I have thought about it being a power issue - related to the PSU, but the system is otherwise stable, and the PSU is plenty big enough to cope.
Any suggestions for a solution or methods for diagnosing the cause of these crashes are welcome.
Thanks for checking out my issue.