DX11 TempTarget and preview fast

I have now on some occasions experienced that using Renderer (DX11 TempTarget) and Preview (DX11.Texture) gives me significantly higher frame rates in fullscreen than just using the normal Renderer (DX11) in fullscreen.
Am I the only one experiencing this?

Yeah there’s a small bug (fixed by then), which can slow down renderer, in case you have a depth buffer attached.

so disabling depth will make the renderer faster?