On topic, I recently became interested in alt coins and quite frankly bitcoins are far too expensive for me to be making profit without alot of potentially dangerous buying, but litecoins, at an average of £20 for one seem worth it, especially seeing as the low difficulty at the moment is enabling people like me to use a bog standard graphics card to actually mine fairly efficiently, even if I am about to complain about my hashrate

So I've got cudaminer working, i've got a gtx780 but the hasrate is only ever 250 kh/s
how can I improve this? i'm running the april version of cudaminer as I can't seem to find a place to download the latest version, I understand there are a few people are getting up to 450 kh/s with the -l T30x16 kernel command but i don't seem able to force this code to work, which may simply be because of the older version of cudaminer
any help would be greatly appreciated.