Monitor On Switch audio delay

Hi,

I have a delay to hear my Input when I turn on monitor on a track.
That is especially annoying when you are working with Punch In’s.
I use Tapemachine Style Monitoring.
I hear the Track Playback when the point of Punch In comes
the Track goes into Monitor but I hear the audio 200ms or so later
It is all in sync but it is audible later.
It doesn’t matter if I record 24 tracks at once or only one.

I tried many different buffer sizes for different latencies.
I tried turning on and off Asio Guard.

This worked perfect before, but I have a newer, more powerful computer now.

Does anyone have an idea to fix that please? Thank you in advance.

My setup:
Software:
Cubase 7.5 x86
Windows 10 x64 Pro
Recording in 44,1Khz, 32 bit float

Hardware:
Intel i7 7700K 4,2Ghz
16GB DDR4 RAM
SSD M.2 Samsung 960 Evo 512GB

Soundcard:
RME HDSP 9652
Audio comes in from a Mackie d8b via 3 Adat cables.

Switch off plugins with high plugin delays.

Not using any plugins!