I used those settings to make sure nothing like the "opencl" you are using for example, can interfere with the default settings and change the results of an CPU encoding. In your case the graphics card is used, I dunno how much this will be different between 32 and 64 bit of x264 =D
So overall, yes I can confirm a slight increase in performance, though it seems to me that it might be not that big, depending on encoding settings, used hardware and used content.
Okay, I can NOT get SWF files to work, nor can I get transparency to work on the html files. I made sure to publish the files with transparency, but either I'm not choosing the right path, or something. It just will not work.
I can get the html files to load perfectly fine, but still, not transparent. It has a white background.