I have 24gb ram, only 16gb detected

[najkec2003]

I have recently noticeed that only 4 of my 6 ram sticks were wroking. Last time i checked they was all working and i don't have a clue why they are not now.I don't have much experience in computers as i mostly use my computer for gaming. Please help me!

Specs
I7 960 3.20 GHzz
GTX Geforce 580
24gb Ram

 

[MeanMachine41]

Please list your RAM part No and how you have configured them in the MB RAM slots.
You will experience problems if you have mixed modules from different kits.