The GT730 is a very low end card that's a few years old. It came in two versions, with 384 or 96 cores and different frequencies. For example, an older GTX980 has 2048 cores, a newer GTX1080Ti has 3584 and the brand new V100 even 5120 cores.
A GTX750Ti does ~700h/s in litecoin. Considering its 640 cores and clock speed, it seems like you have a GT730 with just 96 cores. That would be really poor.
And again, the size of your GPU RAM does not matter at all. You could have 60000MB and it would not run any faster. Big difference to games.
You can try to add -w 4 to your command line and see if it gets a bit better.
And if you have the exact name of your card I could tell you what kind it is and if that speed is okay or not.
A GTX750Ti does ~700h/s in litecoin. Considering its 640 cores and clock speed, it seems like you have a GT730 with just 96 cores. That would be really poor.
And again, the size of your GPU RAM does not matter at all. You could have 60000MB and it would not run any faster. Big difference to games.
You can try to add -w 4 to your command line and see if it gets a bit better.
And if you have the exact name of your card I could tell you what kind it is and if that speed is okay or not.