I am sorry to have to tell you that the i7-4790K processor is not supported by the DZ87KLT-75K board.
For a complete list of the processors supported by this board, consult this reference: Compatible Processors.
Thank you for the response.I'm surprised with Intel. When I bought the processor was compatible with the mother board and was announced in the intel site. Suddenly they removed the processor from the site and got the loss.