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When playing Battlefield 3, I get a framerate of about 20-30 FPS. When playing mutliplayer, maybe after 5 minutes or so the framerate will drop and stay at 4-8 FPS. When a new map is reloaded this resets.
I am wondering if there is any common graphics settings for this. I noticed that Catalyst reports my video memory as 4 GB "Hypermemory". Perhaps at some point RAM is being used for video memory? (The card is 1 GB), maybe disabling this will help?
Update:
Using GPU-Z, I noticed that when this happens by GPU load % drops from a steady 100% to 0-10%. So it is as if the graphics card stops being used. The dedicated and shared memory are not going to the capacity of the card, so I don't think hypermemory theory is right.
Seems to happen after the process memory gets to 1024 as wel... can't find a way to disable Hypermemory. Some things mention a Memory entry in the registry under ATI, but I don't have that. Also "ATI Tool Tray" fails to do it. – Kyle Brandt – 2011-10-29T03:37:09.483
You'll need to post your specs. The number of causes for a dropping framerate are numerous. – surfasb – 2011-10-29T07:37:18.387
8 GB RAM i5 M540 2.5 GHz, Raedon Mobility 4670. The card is kind of under powered for the game, but played the entire campaign fine. – Kyle Brandt – 2011-10-29T13:26:54.790