Hi, I have same problem like guy from this topic: techspot.com/vb/topic110416.html but any methods didn't help.
Attaching dumps, hope, they can tell more than me x_X
As per both minidumps your issue is with the Real Teck High Definition Audio driver RtkHDAud.sys (we see this driver a lot).
If you bought this sytem then go to the manufacture's website, find your exact model #, and update the latest audio drivers from there.
If you built this from parts go to your motherboard manufacture's website, find your exact motherboard, and update the onboard audio drivers from there.