Aliens vs. Predator (2010)
From what I've read in the Forums, the sound issues could be your X-Fi soundcard, if you have one, that is.
1: Play DX9 unless you have a combo of Vista/Win7 and a Radeon HD5k series video card. DX11 is only available on Vista and Windows 7 (it is NOT exclusive to Win7).
2: Update drivers as applicable (Video, audio, etc.)
3: Disable background processes that are not needed. This includes anything that can eat up CPU processes such as automatic updates for Antivirus software, and anything else that can interrupt the game.
4: Ensure your rig meets or exceeds the RECOMMENDED requirements (Minimum WILL give issues, as it always does on games).
I didn't have this problem with my 5870 (which I returned since it caused problems everywhere else) but I do notice it with my GTX 260, even in DX9 mode.
I am running a GTX 280 never had a problem with memory leak nor slowness at all.. it works great for me...
[Edited by Evil_Ironman, 2/17/2010 11:24:16 AM]