As OP says, I can run battlefield 3 on moderate graphics with a steady 45 fps.
Yet, I can't run the shaders update without lag.
Specs of my Laptop:
Windows 7 Home Premium 64-bit
Processor: AMD E-450 APU with Raedon(tm) HD Graphics (2 CPUs)
Memory: 4096 RAM
DirectX Version: DirectX 11
Graphics Card: AMD Raedon HD 6320 Graphics
Approx. Total Memory: 1960 MB
Note nothing from Intel.
No shaders: 80-110 FPS. Normal.
Minimum Shaders: 25-35. FPS. Dafuq?
Low Shaders: 16-30 FPS. Huh?
Medium Shaders: 10-20. FPS. What is going on here?
High Shaders: 6-15 FPS. Honestly?
Why is this?