Lensgrabber, Antminers are tuned to do SHA-256 calculations, which is the Bitcoin algorithm. A few other coins to this as well, but not Litecoin or most of the new coins. Are you saying you can get the Antminer to do 100kh/s on LiteCoin? That's pretty good, altho it depends on which one you're talking about. Are you talking about the basic USB one which retails for around $70? Or the upper end ones which go for around $8,000?