As Tenida said i tried install pcie GPU it words good,there is no problem with display flicker.After i desired might be either on-board graphic or will be the hdmi slot issue as d6bmg said.So i had send M/B to my retailer prime abgb and they received it on 17th Sep,and they submitted to rashi...
My pc spec,
ASUS MAXIMUMUS IV GENE-Z
INTEL I7 2600K 3.3GHZ
GSKILL 4GBX2 2133 GHZ RAM
SEAGATE HDD 2TB
GLACIAL TECH 950WATTS
NOTUA D14 COOLER
LG E2290 LED MONITOR
Assembled 2weeks before,from day1 to now i got problem display flickering.Display comes 2sec and vanish,even less or long time...
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