Recent huge FPS drop in sc2.

i5 760 @ 3.8 ghz
radeon hd sapphire 6850 o.c. 900/100
8gb ddr3 1600 ram
1tb sata 3 hd.

I used to play sc2 on extreme settings.

Then all of a sudden, if i go to ultra or extreme, i get over a 50 fps drop.

but if i switch both terrain and other graphic mode to high, i'm back up to steady 60 fps.

I don't know why this happened, or what i can do to fix it. I tried reinstalling video drivers, with a full manual uninstall, from amd support site.

Looking for opinions, ideas, or other people who have the same problem and know how to fix it.
4 answers Last reply
More about recent huge drop
  1. haved you backed to older drivers to see if that makes a difference?
  2. sounds like vram issue, try resetting gpu memory clock to default
  3. I reset to stock gpu settings and still same problem.

    I do note that now, i've narrowed it down to two settings that really mess me up
    The texture quality has to be on high. if i put it to ultra, and all other setings on very lowest, i still get a 50 fps drop. As well the shaders on high, if on ultra and every other option very lowest, i still get 50 fps drop.
  4. 1920x1080 resolution and HD monitor with HDMI cable, (i'm not sure if 1080p) is harder on GPU.
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