Quote - Be aware also that the real reason you'd be interested in 64-bit at all is for memory management - as far as I've seen the difference in performance is small or even negligible.  If you're not running out of memory while rendering what you already want to render then there may not be anything to gain by switching to 64-bit rendering.  Now, it will likely expand your capabilities, but if you don't care about rendering more complex scenes it may not help you.

 

And if you aren't running P7, you won't know if 64-bits is an improvement. I've found that P7 has never used more than a GB, and often only about 650 MB, on scenes which in P6 would cause an out-of-memory error. P7 is much more effective with memory, and can probably handle anything within reason. (If you have a lot of figures close together, it is conceivable that the number of textures in a "bucket" would be sufficiently high to cause render problems.