i installed win8, yesteraday
Today i decided to open a project i have and i am having really bad render speed
The render use to start pretty fast and also render fast in win7
Now it is extremely slow
smoke,rbd,fur are included in the frame

houdini apprentice HD
12.5.553

system spec
nvidia drivers 327.23
win8
dual xeon 3.07ghz
48 gb ram

i downgraded to version 12.5.469
and everything render as it use to be

i notice something with my CPU usage
in version 12.5.533 my cpu usage wouldnt go above 3.01 ghz
with the earlier version it goes up to 3.28ghz

hope it helps your developpement at side fx