[ashlar]

No one else can comment on this? I'm still using 16.1 and I'm curious, too, if this is a problem with 17.3? Are frame rendering times increased?

Try the 32-bit version?

I'm using 17.3 x86. Yesterday I installed madVR 0.91.10 to give this a go (before I was on an old release, prior to NGU's introduction). Rendering times seem pretty identical to me. I did *not* install Creator's Update, as I read on madVR's thread on Doom9 that it could cause problems. Using a GTX 660 on my HTPC I can use NGU Anti-Alias or NGU Sharp set at medium or high (depending on starting resolution and number of pixels to be processed, as we know 4:3 or 2.35:1 sources are easier than 16:9 ones).