64bit R11 VS 32bit R11

[Per-Anders]

Speed will never be dramatically different between 32bit and 64bit (unless you have a lot of legacy code or are eating up into your virtual memory) so really it's best to ignore the 64/32bit comparison on those grounds.

In terms of differences between R11 and 10.5, R11's render engine was speeded up a lot from 10.5, have a look at Maxons website as it shows some examples with different speedup times, you should see on average around a 2x speedup, some scenes less where there's less raytracing anything with extensive raytracing maybe more.

[LucentDreams]

Speed will never be dramatically different between 32bit and 64bit (unless you have a lot of legacy code) so ignore the 64/32bit comparison. In terms of differences between R11 and 10.5, R11's render engine was speeded up a lot from 10.5, have a look at Maxons website as it shows some examples with different speedup times, you should see on average around a 2x speedup, some scenes less where there's less raytracing anything with extensive raytracing maybe more.

In terms of general speed of things, simulation pure polygon crunching etc I agree, in fact because your system can handle more geometry memory wise often your going to be slower simply because in complex scenes your not running into your memory limits as quickly and working around optimizing. So 64 bit does encourage innefficiency in workflow too.

That said in my experience in most real world work you should see a notable render speed increase on the windows side, I've no experience with the 32 and 64 bit on the mac side. On the Squirrels project I did last year we were seeing even better than typical averaging 15% better in most our scenes. Because of plugins our animators had to work in 32 bit but I did all our rendering in 64 bit, it was the only feasible way to finish our animations. That said one reason for this which no longer exists, was the difference in cpu support for 32 and 64 bit. the 64 bit has always only supported sse2 where as the 32 bit had more support and was thus less efficient. With R11 a lot of older processors are no longer supported as cinema has been optimized for sse2 extensions, but this speedup will really be for the 32 bit versions. I've not done newer comparisons to see the new differences which I'd expect to be much closer now, but for 10.x I personally have always hated that the typical Maxon answer was not really as my tests usually said different in rendering, usually a notable speed up.

[lllab]

64bit is all a out ram usage not speed. most apps are slower in 64bit actually, so maxon made a good job the 64bit verison is a tiny bit faster indeed:-)

cheers
stefan

[MJV]

I think the 64 bit version previously had some optimizations that the 32 bit version didn't, but that may have changed with R11.

[NicoAdri]

On my quad core MAC OS X 10.5.4 rendering speed was nearly twice as fast on 64 bit compared to 32 bit.

IIRC the times were

32 bit = 55 secs

64 bit = 29 secs

Only a brief test with the DOF demo scene.

Adri

[Srek]

I think the 64 bit version previously had some optimizations that the 32 bit version didn't, but that may have changed with R11.
No, with 64 bit there are several more CPU registers available to be used, this is an advantage that simply is not available for 32 bit applications.
Cheers
Björn

[jerry0520a]

No, with 64 bit there are several more CPU registers available to be used, this is an advantage that simply is not available for 32 bit applications.
Cheers
Björn

thanks for explaining. Mean the current lastest version R11 will not take much advantage like R10.5 on 64bit? anyway, i just curious.

[lllab]

sure it does take same advantage.

cheers
stefan

[adrencg]

I've heard a goofy analogy(but makes sense) that if you had a bike(32) and a Ferrari(64), and you needed to get to the house 3 doors down, the bike will get you there as fast as the Ferrari.

But, if you have to go to the other side of town...

[K. Scott Gant]

Wait until you load a REALLY complex scene and you'll see the difference between 32-bit and 64-bit....even on systems with only 2 gigs of RAM. It should load much quicker on the 64-bit system. I've already seen this with the Demo of R11.

[govinda]

As the previous poster said, the difference may not be great...until you have a scene that simply won't render at all on 32bit. At that point, facing OOM messages from the app and the possibility of job-threatening scene issues, having 64bitness is quite a big render speed increase--from infinitely long / impossible to quite fast.

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