davinci horizontal distortion lines

[Joseph Owens]

Try lowering the rendering speed. The GPU might not be getting source data quickly enough.

jPo

“I always pass on free advice — its never of any use to me” Oscar Wilde.

[Marc Wielage]

I use iStat and MagicMenu to keep track of internal machine temperature and the CPU/GPU load. If you avoid rendering until the machine is below 100 degrees, it can generally get a reasonable way through it before the glitches start — on my specific machine. I’m also running external fans and using iStat to turn the internal fan on max.

Very heavy workloads, like 4K with TNR and blur modes, prevent me from doing more than about 10 minutes at a time, sometimes less. This forces me to render out in chunks and then reassemble them later on. HD is rarely a problem. The glitches typically happen when the machine goes past 133-134 degrees, but it’s sometimes unpredictable. I find it helps to have zero background activity other than Resolve running.

This is under OSX 10.10.3 and Resolve 12.1. If OSX 10.11 solves the problem, I’ll consider upgrading.

[Steve Harrington]

Thanks guys. It seems one of my graphics cards is on its way out though.