Difference between launch DX12 app with/without Graphic Debugger

Hey Guys,

Does anyone know the differences between launch your DX12 app with/without VSGD (visual studio graphic debug)?

I have a QueryHeap (timestamp) corruption bug only show up if I run my DX12 app on GTX1080 without VSGD. It's kinda make me feel like it's a nvidia driver bug since it only happen on GTX1080 (I tried with GTX980, GTX680m, they works properly under all conditions). The strange thing is that if I do graphic debug on GTX1080, everything get back to normal.... 

So I was wondering is GPU works in a different mode if I attach VSGD? Or there are other settings get changed when launch with VSGD.

Thanks in advance