I'm mining in ethpool with windows 7 (intel i7 @ 2.80GHz 16GB....but that doesnt really matter, right?) and a Radeon RX 480 8GB card. humming along at a steady 24.75 mh/s. haven't done a thing to the settings. can i get better mh/s out of this setup by tweaking it a little bit? any input appreciated. cheers
Your hashrate seems par for the course. At this point in the game, the mining software you are using is optimized to the fullest extent.
The only thing you can do now is try overclocking your card. The core clock won't affect your hashrate much, but raising the memory clock may give you a boost.
I would start playing around with that value and determine what your card can run at stably. If you go too high, your card may fail immediately or may work at first but fail in a few minutes/hours. Keep lowering the overclock until the card can run indefinitely without failure.
I use MSI burner to overclock the memory. I got 27 mh/s
Many says they can get 30 Mh/s and lower power consumption by updating bios. However I have no luck doing so.
See Why I got lower Hash Rate in Mining Ethereum after I use Someone Else BIOS? as I keep doing that.