I'm getting the same problem, in multiplayer. I cannot have a game without crashing. Everytime the fault module is Arma.exe.
I have spent the past week scouring these forums looking for a solution and i refuse to give up.
I have tried all the Maxmem settings:
No pagefile:
Opened ports and disabled Firewall/AV:
Installed Several versions of chipset Drivers and graphics drivers
Installed in different locations.
Turned all settings to low.
updated my openal drivers.
messed about with every possible SLI profile.
Disabled SLI and took a card out.
Reinstalled Vista Ultimate.
Sold my soul to the Devil.
I have tried everything. My brother-in-law plays it perfectly and he is running vista x64 on a lower spec pc i built him.
My Specs:
Asus Crosshair AM2
AMD 4600+ x64 x2 AM2
2x 7900GT (SLI Using the 162.22 Drivers)
Creative X-FI Fatal1ty (Using the Latest drivers and playing in GAME mode)
4GB DDRII RAM
3x 250GB SATAII HDD's
Windows Vista Ultimate x64 (Up to date)