With the scrypt algorithm, I am getting 255 KH/s max. That's with the MSI GAMING N750 TF 1GD5/OC card. My overclock settings are +135 MHz on the core clock and +125 MHz on the memory clock. My cudaminer settings are "-i 0 -C 1 -H 1 -l T4x24 -m 1". I am using the 02/18/2014 release of cudaminer and I haven't tried any other algorithms because I have been mining only since Thursday.