It should only take the edge off, it probably won’t stop you from topping off. Though it’s worth a shot, maybe raising the TDR so it can lag a bit more before it takes out the rendering thread might mitigate it. I’m looking into a better solution for this at the moment, trying to see where the bulk of the GPU weight is hitting to see if we can get over that hump and let the rest process.
You can follow the TDR guide here for that if you wish.
You could also drop to DX11 (if you are on DX12) and get a bit more GPU overhead while you complete that operation. Then change back afterwards (though this will trigger a shader rebuild both times).