last night i use claymore V7 and look what happens in my Main board !!!!! why this thing are happen? all earlier versions was good and no problem with them,but last night after changing the claymore version to V7,this is happend
Are you using powered risers?
PCI-E 1x to 16x riser cable
If it is not powered the GPU does draw the necessary power from Mainboard. Since that 20(24) Pin Connector is powering the Mainboard everything is drawn through it. Powered risers are always useful if you use multiple GPUs.