Grandia II 30 fps cap

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What steps will reproduce the problem?
Run Grandia II until you reach the main menu or during normal ingame, the 
internal fps will go down to 30. Weirdly videos do play at 60 fps.

What is the expected output? What do you see instead?
60 fps, on the title bar the gpu parameter stays at 30 when it should be, or 
try to be, 60.

What version of the product are you using? On what operating system?
Demul v0.5.8.2, windows 7 64 bit

Please provide any additional information below.
Hardware:
i7 2600k @ 3.9 Ghz, 8gb ddr3 1600mhz, amd ati 7950

Original issue reported on code.google.com by Jou...@gmail.com on 16 Aug 2014 at 5:11

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there is nothing wrong, "GPU" parameter says how many times game starts 3D 
rendering per second, it is totally depends from game code, this digit can be 
any - like 0, 10, 30, 60, 120 or whatever game developers decides to make FPS 
in their game.

so until SPG is 60 (or 50 in PAL) - game works as it was programmed by authors 
in term of speed.

Original comment by 0vet...@gmail.com on 16 Aug 2014 at 9:56

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I do play the ntsc version.
SPG is 60 most of the time, on some rare cases it goes to 59 for a moment, the 
same with GPU, is stays on 29-30.

I tried a PAL version and it suffers from the same it stays on spg 60, gpu 30, 
not spg 50, gpu 25 as you comment.

As far as I know this game should run on 60 fps, google a bit if you don't 
trust me or check the original, but from what I tested just panning the camera 
around it isn't running at that speed, it lags a bit. Even if I underclock my 
graphic card or change the graphic settings on Demul to minimum or maximum it 
behaves the same way.

Original comment by Jou...@gmail.com on 17 Aug 2014 at 1:36