you should be using all GPU's with RISERS to mine.
If you want to game with 2 GPU directly into the MOTHERBOARD, reset your bios to factory defaults and get 1 PSU
that will power both cards.
Sorry for misunderstandingI meant to say that this is a gaming motherboard and it is designed to support 3 GPU directly into the MOTHERBOARD? If yes so why it is not letting me to use 2 crossfire GPU directly? and tried to reset motherboard and also updated to latest bios.
Secondly I am able to use total 4 gpu on this motherboard and the problem is when I put the riser cable to 16x or 8x gpu slot In motherboard it does not recognize it and when I put the riser cable into 1x pcie gpu slot into motherboard It easily recognize it.
So the problem is in this motherboard there are 3 full gpu slots (I mean 16x and other 2 are 8x or 4x do not know exactly) and other 3 pcie gpu slots are 1x.
So also in risers It is not letting me use 6 gpus?
PC Specs
1000watt PSU
Motherboard Z97 Gaming 7
Ram 4 DDR3
SSD
Processor intel G1840
I want to use this motherboard for mining.