Can anyone point me in the right direction to set up a GTX 280? Running the 2-04-2014 version it gets <14kh/s, which seems terribly low. I have afterburner installed and has messed around a bit, but nothing I have done seems to change anything. They auto tune in cudaminer chooses F46x1. I haven't played with much else: cudaminer.exe -H 1 -i 0 -l F46x1 -C 1 -o host:port -O username:pass
Don't go out of your way, I'm only messing with it because I'm bored shiatless atm. But if you can give me a hint or two, maybe my results will help someone else later.
That's definitely not good, I have a lowly GTS 250 that will do about 40kh/s - 42kh/s on the 02-04-2014 version. That's on linux.
Autotune doesn't always pick the best config in my experience. e.g. when I autotune in non-interactive mode it picks F32x2 which drops the hashrate by 25% compared to either F16x4 or F15x4.
Try autotuning a few times with both -i 0 and -i 1 to see if it comes up with different choices that perform better - then you can manually tweak them from there. Other than kernel config (specific for your card) all the other options are the same as I fire it up with.