for max performance
HOdlcoin-qt.exe -gen=1 -minermemory=2 -genproclimit=8
to leave some CPU free for other stuff
HOdlcoin-qt.exe -gen=1 -minermemory=3 -genproclimit=2
This version HOdlcoin-qt.exe -gen=1 -minermemory=2 has a performance from 20-23H/s.
This: HOdlcoin-qt.exe -gen=1 has a performance of 35-40H/s. All on Windows 7 64bit and 3GB RAM.
The same on my laptop. With 2GB memory is the hashrate the half as with 1GB.