ram post problem

[lolpmx]

I have asus p9x79 motherboard, 1x2gb and 1x4gb ddr3 1333 RAM and i7 8320.
When i try to boot dram led glows red and nothing is displayed. What could be the problem?

 

[Tolis_GR]

It may simply mean that RAM doesn't like each other. Try to boot with a single RAM and see if you get post. Then try the other ram. If you have post with each one of them, write down the timings of each RAM for 1333 mhz of frequency. Then enter bios and manually set the timings that are more "loose". i.e one kit plays at 9-9-9-24, the other plays at 10-10-10-24, then manually set 10-10-10-24