CUDA acceleration in preview window but no when render to the file (Windows)

[Tomasz Swierczynski]

Of course I read all yours replays and I am very grateful for all of them. I’ve already replied to Lauri that possible bottleneck in my system is the hard drive and that I already ordered two additional disks. For some reason (I am new here) all my post going through moderation and there is a delay between posting a message and showing it on forum’s thread.