My Rig:

Asus Z270-A
4gb Ballistics DDR4
120GB Adata SSD
1000 Watt EVGA G2 Gold
Intel Celeron CPU
3x EVGA 6GB 1060
3x Zotac 3GB 1060



When I set it all up one of my 1060's would not hold a steady voltage, it was fluctuating like crazy.  It caused my system to reboot itself once every 6 hours or so.  Oh well, 5 cards worked great.  I yanked it out and RMA'd it, never had any other stability issues.

Got the new EVGA 1060 GB in today, get it all plugged in on the riser and fire it up.  The fan spins up but windows detects nothing.  Weird.  I reset all my connections, still nothing.  Tried a new VGA PSU power cable, nothing.  Tried a different VGA power port in my PSU, nothing.  I thought maybe this card was bad too, then I stuck it on a known working PCI-E riser and windows saw it and its currently mining.

I took the known working card from that other PCI-E riser and stuck it on the one I initially tried to put this new card on...and that one was undetected in windows as well.  So both GPU's work, I got that far. 

I thought well maybe its the PCI port on my mobo...switched the riser connector to the last open slot and still nothing, so I doubt its that.  So I'm left with a bad riser...I think.  I don't have a spare to test with unfortunately. 

Am I overlooking something?  Any ideas?  Thanks!