Hello I have a GTX 650 ti GPU and I manage to do only 45 Mh/s I have seen on charts online that a GTX 250 which is a much weaker cards puts out 80 Mh/s so why do I have so low hashing?


Also I have an old 9800 GX2   could I use them both for mining? should I set them up as different workers?


I also have a Dedicated PhysX card is it compatible with any mining software??


Last but not least I can not run mining under CUDA (with cudaminer for example) could anybody give me a little heads up about this? thnx