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Battlefield 3 FPS drops drastically from ~70 to ~30 when 12x scoped/zoomed on some maps

post #1 of 7
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So I finally unlocked the 12x sight for a weapon last night and was derping around on Caspian Border.

I noticed when scoped into certain directions (for example, scoping into E from C), my FPS drops drastically from ~70 to ~30... was wondering if this was normal? Does anyone else have this problem?

System is in my sig below. Does my motherboard have anything to do with it? My motherboard is only PCI Express x16 V1.1. Is my system drastically bottlenecked somewhere? I didn't think a 3.4ghz Core 2 Quad would bottleneck a 6950, as I just ugpraded from a GTX 285 to play BF3. Unscoped with my in-game settings below, I never really fall below 60fps.

Resolution in game is 1920x1080 with all settings on high, vsync off, AA off, aniso 16x, motion blur off, and SSAO. Using AMD v11.10 WQHL drivers.


It happens regardless of resolution or settings... so I'm stumped. Any ideas? I fully formated before I installed the 6950 so there are no previous driver versions on my computer. Windows 7 Ultimate 64bit is a legitimate non-pirated copy.
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Budget Build :D
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post #2 of 7
same problem here....

disabling MSAA fixes it to some extent...
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post #3 of 7
Same thing happens to me. Higher zoom = more lag. And I'm not using MSAA at all.
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post #4 of 7
Same here.

I can't find a fix so far. I hope DICE takes care of this on the next patch biggrin.gif
Untill then, No sniping for me.
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post #5 of 7
This is quite normal for all fps games.
The only explanation ive been able to gather, is that the cards are rendering on a zoomed up resolution.
1920x1080 becomes 3840x1080. 
Pretty much doubles which does seem logical considering whats happening on screen.
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post #6 of 7
No, actually its not normal....try the same with GTX580 you will lose alot less fps, its AMD driver/engineering issues imo.
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post #7 of 7
at first why are you zooming in with 12x where 4x to 8x is just perfect. and with that zooming in you have to zoom in with a closer view which means it has to leep everything in the sight zoomed in and everything on the outer part of the sight normal to the res you are using. you can't blame something like that on amd driver/engineering. it's just the gpu's both nvidia and amd can not render that information that quick and two different resolutions at the same time. the only reason nvidia is doing better is the fact the shaders can be clocked past stock and can render the information a bit quicker.
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