TTX2 + Capcom I/O inside AtomiswaveSD cab always chuck out I/O error after 15 mins play

[GumGum]

Hi guys, I have AtomiswaveSD cabinet. I currently have TTX2 + Capcom i/o with TGM3 image from Neko. The game runs fine and all that but it always chuck out I/O error after 15mins or so
I am wondering this is due to Capcom I/O issue or is it due to Power Supply here? Thanks