Rendering 4K Issues 4.26.0

I’ve been trying to render some sequences out to png at 4k, but having a crashing issue…Have tried the capture movie button in sequencer, as well as sending to render que…both get the same results…it will run for a short time then crash…sometimes 20 or 30 frames, sometimes 100 or more…Tried on 2 machines, one with a GTX1070 and the other with an RTX2070 Super.

In the editor, I can move about with no glitching or slowdown, at a fairly good 30fps average (im not worried too much about real time speed, since I’m just making videos).

Rendering to 1080p has no issues at all. And it’s not all the sequences, though the differences between the ones that render 4k fine and the ones that crash is very small.

Any ideas?

there can be all kinds of issues
if you check the project>saved>logs
and check the text files there
they should give you some hint as to what’s causing a crash