I get the same thing 4.6GH/s when going straight to mmpool, 4-4.1GH/s through gpumax
Its fine when purchases are running
With my single 6850 I get 250MH/s going straight to mmpool and 225MH/s going through gpumax.
You guys are seeing the MH changes in your miner or just on the pool?
Just on the pool, my miners report the same speeds to both mmpool and gpumax, but mmpool reports different
mmpool's stats don't update the fastest though, so it is hard to tell where the problem is