Ok, this was the post I was going to write.. but in writing it I figured it out.
on a 1280x720 30fps comp, I can't seem to preview higher than 20fps - even with a blank comp.
my specs are as follows:
Core 2 quad Q6600 @3GHz
8GB of DDR2 800
Geforce 280GTX 1GB (latest drivers, and old drivers made no difference)
6 HDDs varying from 320GB to 750GB
I've gone through the AE optimisation guide, and managed to squeeze out about 2 extra fps. Was initially getting 17fps, and overclocking put me up to 21fps. Is this really the best I can expect from an empty comp with this spec? Or am I doing something wrong?
I can only just get 24fps on a 640x480 comp (empty) - and that even drops back to 22 at times.
I have openGL preview on.
I have openGL render on.
I'm in Windows 7 x64
I have 2GB allocated per CPU
I have 1 CPU left spare for the OS
Aero is on.
Very confused. Especially when you consider I can usually watch 2 1080p movies similtaneously with out even the slightest shudder. I'm not saying I expect this, but 720p?
And here is the answer:
Turn off Aero! Now getting 30fps easily.
Wow.. can't believe it removes an entire 10fps.
Sounds like this is still a driver issue for W7 that NVidia need to figure out... Anyway, thanks for sharing.