It isn't 35MH/s per 750ti (at least not mine) I think it is rather 26~28MH/s, also it could be some wallet issues, sometimes it gets stuck...
thanks for your answer.
re-checked - with the test windows system I find a block quite fast, without restarting the wallet.
And the hashrate is clearly not the same as in linux (linux = 35mhash per card vs. 25mhash with windows).
...here seems something wrong. does your miner has a debug mode (-dp)?
nope... may-be you could try to run on the testnet and see what happens...
had a rapid look into the main loop, the linux miner use a different method to access time, would that be the problem ? (don't know enough about these routines...).
But I don't know if it is really related, looking at Christian hashrate actually it should be higher (on windows the 780ti does around 40MH/s...)