Bc2 + sli

[Icewielder]

Interesting thing I discovered last night, Bad Company 2 appears to scale terribly to SLI rigs unless you are running at high resolutions, an by high I mean >= 1920x1080. So for anyone that happens to have SLI (MattDW) I suggest at least trying the game with SLI off. If your running at extreme resolutions SLI still is the best option. I run dual 8800GT's.
btw, BC2 is extremely CPU oriented, disabling services and anything else that uses the cpu will greatly help. (Or overclock it)

Res 1366x768, DX10 with every setting maxed with SLI enabled: 25-45 fps
Res 1366x768, DX10 with every setting maxed with SLI disabled: 40-60 fps

Res 1920x1080, DX10 with every setting maxed with SLI enabled: 20-32 fps
Res 1920x1080, DX10 with every setting maxed with SLI disabled: 10-25 fps

[LockeCPM4]

Yeah the code for BC2 is pretty buggy right now so that would make sense. Hopefully this is one of the performance optimizations that DICE says will be in the retail version of the game.

I hope they get the Dual Core processor bug fixed too. I have random times where, for no reason that I can tell, my game will drop to about 5-10 FPS which is unplayable. When I ALT+Tab out of the game, windows shows that both my cpu cores are maxed out, when they generally run between 50% and 70%. There are several forum posts on EA of people with dual cores complaining. Gotta love Betas!

[MadCalf]

hmmm. the SLI could be my problem. not sure, i mean i think you saw my other post on my bc2 not running to par. i'll try it and see what happens

[GrossKopf]

I know the CPU makes a huge difference. It have an ATI 5870 video card am BC2 lagged with my dual core Athlon 5000+ Black Edition. I upgraded to a Sempron II quad core 940 BE and I can now run everything at max settings and it's smooooooth. I don't check FPS because those numbers don't mean much anything to me but I know they much be high as there isn't a hint of lag.

[Crotan]

I upgraded to a Sempron II quad core 940 BE and I can now run everything at max settings and it's smooooooth

lol I'm pretty sure you meant Phenom. I'm gonna have to run some BC2 benchmarks at different GPU overclocks too see if there is a difference.

[MattDW]

just tried turnign off SLI usign my SLI'd OC'd 260s, i did have lower FPS using single core rendering. between 30-40fps, and normally ~60-70. running at 1600x900

[GrossKopf]

lol I'm pretty sure you meant Phenom. I'm gonna have to run some BC2 benchmarks at different GPU overclocks too see if there is a difference.

Yeah, that's what I mean.

[Icewielder]

1600x900 must be high enough then to have a decent scale

[Histor]

Res 1680x1050, DX11 with every setting maxed with SLI enabled: 80-100 fps Dual 280 GTX
Res 1680x1050, DX11 with every setting maxes with SLI disabled 45-67 fps Single 280 GTX

[drunkenpilot]

Nice system, Histor.

[Icewielder]

Your not actually running full DX11 lol, the 280GTX doesn't support it. At least the hardware portions of it.

[Icewielder]

Interesting, after this latest update I get almost 80 FPS at 1920x1080. That would lead me to believe that this game is many times harder on the CPU than GPU, as GPU intensive games decrease in FPS as the resolution increases. At 1920x1080 the GPU will have taken over far more of the work than at lower resolutions, and the GPU is generally faster at the same tasks. So you might try 1920x1080 if your monitor supports it, you may get a smoother game.

[LockeCPM4]

Support for multiple GPUs (AMD Crossfire / Nvidia SLI) in the first PC Beta build was only partially working and could cause visual artifacts. This is improved on in the latest Beta client and since that version we have done additional performance scaling improvements that should be a good benefit.

You should see an improvement based on the BFBC2 blog.