cudaminer.exe -q --algo=scrypt:2048 -d GTX780 -C 0 -b 512 -i 1 -m 1 -H 2 -l Z12x20 (vtc) -> 335kh/s (and as low as 252kh/s...pretty wild swings but mostly 300+)
I got the strange effect that while Google Chrome is started and visible the hash rates are higher. Does not even have to show a specific web page.
But for now I've stopped mining VTC via p2pool because there is currently a problem with low hash rate workers not getting paid what they should. A fix will be rolled out by VTC p2pool operators soon hopefully.
Christian
Can someone confirm this happens also if the interface is running on different card? Is it possible that running flash forces some kind of performance mode?