h.264/mp4 playback on N97

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I would like to know, from those who already have an N97, how the video playback is with h.264 encoded video files.

I'm worried that it might be rather laggy at higher video bitrates since the N97 doesn't have a dedicated graphics chip.

From my own tests with the E71, the highest bitrate for smooth frame rates (no dropped frames) is 128kbps/video + 64kbps/audio. The E71 has an ARM 11 369MHz CPU which limites how fast the h.264 video can be decoded.

So with the N97's ARM 11 434MHz CPU, what can I expect in terms of max bitrate for h.264 video playback?

Also, can the Symbian OS 9.4 of the N97 play h.264 video larger than 320x240 pixels? Previous Symbian versions will not play h.264 format beyond this size.

Thanks in advance.