sry my bad.
I've tried it just now and you are right, the two "good" cards are micron and the "bad" one is hynix.
So what you are saying is, it is just not possible to get a better hashrate with this one?

Hello guys,

I have built a mining rig with 3 gtx 1060, out of the box two of them are mining with around 19 MH/s, if i overclock them, they can stable run around 23 MH/s.
The third card appears to be problematic, out of the box it is only mining around 15 MH/s, if i start to overclock it only a bit, claymore givers me a error message:
"GpuMiner cu_k1 failed 4, unspecified launch failure. GPU 0, GpuMiner kx failed 1" together with a "error 999" message.
After that, the hashrate of all cards drop to 2 MH/s and i have to restart my system.

what i have tried so far:

- solo mining with the problematic card
- Using different pci-e slots for the problematic card
- reinstall the latest BIOS-Driver
- reinstall the latest nvidia gpu driver
still only 15 MH/s and no overclocking possible


My setup:
GPU: 3x gtx 1060 zotac mini
Motherboard: msi z170a sli plus
OS: latest version of Windows 10 64Bit
4gb of ram

Has anyone the same problem or an idea how to solve it?
I'm thankful for every suggestion!