O.K., it's just win 8.1 32bit, but it works so far, without any problems. I allready worked on win7 32 bit with sfp 4, now I put an old card in a win 8.1 computer.
Now I will try REAPER at 6ms roundtrip at 44.1 khz. I bet it will work like a charm, but I will inform you if not.
This is an absolute budged solution, but wow, so much is possible!!!
(b.t.w. I had to install scope in compatibility mode & I have to run reaper in compatibility mode to see the asio drivers, I run both as admin)
Martin