Second memory channel not working

[cmdrcos]

What would cause the second memory channel on i5 3470k to not function?  Both sticks work in single channel mode. 

 

Could it be the socket or motherboard?

 

Any suggestions would help. Thanks in advance.

[Guest]

My AsRock z77 Extreme 4 had memory channel issues. 

 

Would guess your board.

[atxcyclist]

I think the memory controller for that generation of Intel processor is on the chip, so maybe it failed. That hardware is now quite old though, so it could be the motherboard instead. Hard to diagnose yourself without a second motherboard and/or processor, but at this point it might be time for an upgrade.