AMD's QA is bad. My friend runs a company that churns about >400 computers per month with AS guarantee mostly for office use. The ratio of initial failure confirmed by manufacturers was 15:1 and the ratio of failing within 2 years (cpu and motherboard failure) was 4:1. Those numbers does not reflect the fact that Intel systems sold more than AMD systems.

People dealing with professional softwares also have problems that are magically solved when they use Intel. Have no statistics on that tho.

How would a CPU fail? Also, did AMD manufacture all failed mobos? In which case who needs to do the QA

Just to be clear, I am not defending defective and/or unreliable products, just want to make sure the fingers are pointed into the right direction.

Freezing, not booting, certain applications not working, failing to pass stress tests, and other misc problems that the user reports.

When those things happen they just send them back to the distributor without testing further because they're not sure. They tell them that a)it's not their fault and returns the cpu or say b)it's their fault and sends a replacement.

Could be that AMD is blindly replacing CPUs rather than test them like Intel does.