This is an entry for Phoronix LCH. Feel free to comment on the Linux compatibility for the NVIDIA MCP55 Integrated Audio in this thread.

NVIDIA MCP55 Integrated Audio

Description: Integrated audio on the MCP55 nVIDIA nForce 590SLI Chipset.
Hardware Notes:

lspci -v
00:0e.1 Audio device: nVidia Corporation MCP55 High Definition Audio (rev a2)
Subsystem: ASUSTeK Computer Inc. Unknown device 81f6
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 58
Memory at fe020000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
Capabilities: [6c] HyperTransport: MSI Mapping