Performance loss during long renders

[parodbd]

Keyshotters,

During long renders (24 hours or more) my CPU will tend to drop from 80% usage to 30% usage.  Is anyone else experiencing this?  I am using a 17" Macbook Pro 2.8 Ghz Core 2 duo, 4 gb ram, Mac OSx 10.6.7.

It seems to happen once the processor reaches a high enough temperature.  This issue is causing my renders to take a lot longer than neccessary.

Thanks for any input,


-Brandon

[PhilippeV8]

Is this the "auto-throttle" where your CPU will throttle back to reduce the heat ?  I think this has nothing to do with KS, but more with cooling ... in which case it should get worse during summer ..

[DonChunior]

We have the same issue (KS 2.3.2 on Windows 7 x64).
We render complete cranes and as more it's going to the end, as less processor capacity gets used. The jump from 99 to 100 % sometimes takes an hour or more.

Regards, DonChunior