Same issues, (OOM error, sounds cut out 1-2 minutes before the crash) same "bleeding edge" specs:
Windows 7
AMD 1090T 64-bit 6 core, 3.2GHz
9GB RAM
ATI HD5450 1GB
Game, when first launched, consumes about 900MB of memory. When the sound cuts out, a quick check in task manager showed over 1.4GB of memory consumed. First thought was maybe Win7 only allocates 1/6th the total memory for each of the 6 CPU cores and the game only runs on a single core...
EDIT: From the dates of the previous posters, it looks like they may have been running earlier versions of the game? To be clear, I'm running the (currently) latest patch release 1.06.