the modules are 4x8gb ddr3 1866mhz-cl6 dimm-1.5v ram modules, the board starts without video. I have only achieved video using only 2 modules The bios is updated to its latest version. An attempt was made to reset CMOS without success. the source is an ANTEC 650w 80Plus and the processor a Phenom II x4 Black Edition. Has anyone this problem fixed?