Rendering issue - system out of application memory

Hi, I’m having trouble rendering a project (resolve 15). A proxy version runs out fine but now I’ve switched to using the raw footage I keep running out of memory. I’ve heard fusion might be the culprit (as I’ve rendered a uhd timeline with 4K raw footage on this machine plenty of times). Does anyone know what I could try to get the project to render? Thanks

[Peter Chamberlain]

Could you at least share your OS and system info in detail inc GPU detail.

No problem.

DaVinice 15.0.0B.065

OSX 10.13.5
MacBook Pro (Retina, 15-inch, Late 2013)
2.3 GHZ i7
16gb 1600 MHz DDR3
NVIDIA GeForce GT 750M

Fusion appears to be the issue. I've only got a couple of nodes text and a background node on two clips; with them the project runs out of memory when processing RAW, even 1080p. Without them it'll render UHD fine (all colour nodes etc the same).

Your GPU is too weak for UHD/4K. Try HD.

Your GPU is too weak for UHD/4K. Try HD.

Won’t even render 720p. However as I said it’s absolutely fine rendering 4K (with grain, sharpening, nr etc.) without the very basic fusion effects, so I don’t know if that’s the issue.