it may be because i'm using windows and all these miners are optimized for linux... haven't gotten much over 55khash with the cpu on any pool.
Seems a bit low for CPU. Is this with multiple threads? I am getting about 300 khash on my CPU using 6 out 8 threads - this allows PC to still be very usable. It is a not so recent Dell XPS 8300 i7-2600 Windows 7 x64. This is with the stratum CPU miner cpuminer-multi. Using the following parameters: minerd.exe -a wildkeccak -o stratum+tcp://bbr.farm:7777 -u MY_ADDRESS -p X -P -D -t 6 -k http://bbr.farm/download/scratchpad.bin
With the mbk GPU miner, I get about 410 khash on a 750Ti. However, the computer is not very usable - can only run this miner when I am away from keyboard. The GPU miner only gives me about 30 to 40% improvement depending if I compare running CPU on all threads (which is still good). Note: GPU mining is still solo - was not able to pool mine - think it is a divide by zero nVidia issue