Hi yall,

Read a bit in other forums and threads, but so far haven't found anything too conclusive.  My setup for now is:

- Asus Z170-K + G3930 + Ballistix 8GB DDR4 2400, latest BIOS installed
- 4x Asus GTX 1060 6GB 9G (dual fan)
- Win10 anniversary edition (going from non-anniversary to anniversary increased eth hashrate from 2.5mhs to 17mhs)
- Latest nvidia drivers, which were fully uninstalled and reinstalled a few times
- Latest Asus chipset / other drivers
- Not leaving MSI Afterburner or any other programs running, no OC or downclocking or undervolting at this time, stock settings
- Have run with monitor connected and not connected

It was supposed to be a Z170-A, so I have two extra 1060 soon to be put to use, but anyway, not the point of this thread.  As I've tinkered with this, I've noticed that GPU #0 often has significantly lower hashrates than the other three GPUs.  This happens in both ccminer and excavator using Nicehash.  When the hashrates are lower, I see the other values are lower as well.  I can't see anything obvious to attribute it to.  Not sure if it's just my imagination or not, but setting the "priority" in task manager for the currently running miner seems to help a bit.  That's not something I want to look towards as a solution since Nicehash is always switching back and forth, effectively resetting any priority changes.

If others have noticed the same effect in multi-GPU rigs running Nicehash, what have your experiences been, have you had any luck?