Can anyone please help?

I imported AVCHD files from my Panasonic camcorder and, after editing, rendered it to MPEG-2 DVD HQ. The length of the project is around 1hr 10mins.

On PD9 I stopped the render after 10 mins and it had rendered 9 mins 36 seconds. The CPU utilisation ranged from 40-70% across the 4 cores.

On PD11 after 10 mins it had only rendered 6 mins 7 seconds and the CPU utilisation was 50-80%. So despite using more CPU the render times were much slower.

As you can see it means PD9 was around 50% quicker than PD11 which was unexpected and very disappointing to say the least.

I checked all the settings in both PD versions and believe they are the same so I can't see any reason why the performance should be so different?

My PC spec is:
Win 7 64-bit
Intel Q6600 Quad Core Processor
6 Gb RAM
GeForce 8800 GTS 320 Mb

Any ideas what is wrong?

Thanks.

NOTE: I thought I had put this in the PowerDirector 11 forum but it seems to be in PowerDVD and I don't know how to move it???