I just set up my new mining rig. Now I have 2 problems:
1.) I can overclock the first 3 GPUs up to 2130 Mem. But the other four cards crash the rig when I try to increase the MEM.
2.) I installed the GPU 0 on my PCIe x16 slot. The other ones are connected with normal raisers. When I try to remove the GPU from the x16 Slot and connect it with a raiser to PCIe x1 the whole mining Hasrate will fluctuate from 20 - 26 MHs. And the Wattage fluctuate too. Without Undervolting settings the wattage is only 60 - 80. It should be ~ 115 watt.
Thanks a lot for your help.