|"my ram is1333d3N9"|
I don't know why you got DDR3-1333 rather than DDR3-1600? You didn't state the capacity of the RAM stick(s), but the max your board supports is 2 x 4GB. If you got a single 8GB stick, that's the problem.
"- Dual Channel DDR3 memory technology
- 2 x DDR3 DIMM slots
- Supports DDR3 2600+(OC)/2133(OC)/1866(OC)/1600/1333/1066 non-ECC, un-buffered memory
- Max. capacity of system memory: 8GB*
- Supports Intel® Extreme Memory Profile (XMP)"