Octane 32bit is faster than Octane 64bit (On Windows 7 64)

[Synthercat]

I have a scene I made and left it it render for 512 samples (path)

Results

296 Seconds : Octane32 (WinXP-32 AND Win7-64 same result!)
318 Seconds : Octane64 (Win7-64)
326 Seconds : Octane64 (Dream Studio Linux 64)

So the big question is : One of my OS is Win7-64, do I have any reason to use Octane64 or should I stick with the 7% faster Octane32?

PS For blender users : Dream studio linux 64 is 4.6% faster to bake fluids than the 2nd best benchmark (Win7-64). Rendering using CPU was around 2 times faster(!) but who cares for CPU render when we got that lovely toy Octane Renderer!

[acc24ex]

- this opposite of all other benchmarks - when rendering with CPU 64 bit usually works 10% faster - but GPGPU processing probably depends on the GPU handling instructions - is that in 32 bit? - and not really sure what happens..

- well the drawbacks in 32 bit is the memory usage (around 3.5gb usage), octane voxelizing might be slower ..

[ROUBAL]

The main problem is that a 32 bit OS only allow around 2.5GB of system RAM per application with the 3GB switch enabled in the boot.ini file. No more. With 3GB of system RAM, you can't manage much VRAM on you GPU !

http://dwf.blogs.com/beyond_the_paper/2 ... vista.html