Problem solved. Thanks a ton. The problem is the render time has gone up drastically compared to before granted I did increase lightmap resolution from 256 and 512 to 1k and 2k (u did mention this in your first post) for a number of assets so that might be why the render time has gone up. But I do remember the gpu working faster than presently and crashing close to the end before the TDR fix even after increasing lightmap resolution.