Hi everybody,
first, sry for my bad english writing.

i have a mining rig, my components:

4x gigabyte rx 570 4g
2 of them with 1140 2030 and 2 with 1140 2050 @ 850mv
the rig works very well, i got 114 MH/s "28.5" eth 540w from the wall
i use 2 600w powersupplys, an celeron cpu and a gigabyte mainboard with 4gb ram.
my os is win10 pro an it is setup for mining.

yesterday i install the new claymore miner, the description tells me i can dual mine without a hashratedrop @ eth.
i try this with eth+dcr, but wenn i start mining my eth hashrate drops zu 17MH/s

has anyone try this or a idea?