In Configuration Manager 1606 we got a new option to tweak our PXE boot times, TFTPWindowsSize which we can change in the registry on our PXE enabled DP’s. PXE booting a machine can never be fast enough! Location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\DP Name: RamDiskTFTPWindowSize Type: REG_DWORD The default value is 1 (1 data block fills the window)