Having trouble with my new build, I get no post beeps with any RAM in, I've tried 2 different types, corsair 1333 and g-skill 1600 but neither have worked.
I get 3 beeps when I boot with only the CPU and heatsink in.
I'm using a z77 extreme 4, 2500k with a CM 212 evo and a corsair tx750 PSU.
More aboutbuild post beep installed
Try one stick at a time and make sure you give the stick a lot of force i.e. have the 2 ram stick holders seperated and push it in hard enough for those to clamp onto the sticks. It sounds like you are just not using enough force.