I have tested a 32bit HDRI 32k (32768 px x 16384 px) maps .TIF format rendered with Iray. It works just fine. It requires around 8GB of VRam to render and it's super fast!

However the same map .EXR format crashes Maya during the load in the viewport, on my side.

Can you confirm the issue on your side?
Do you have any suggestions to open and render an EXR 32k HDRI map using IFM?

Thank you

Win 7
Maya 2018
IFM 2.0
GPU Quadro K6000 (Render)
GPU Quadro K5000 (Display)