Nvidia 8xx series - castrated?

[voon]

I'm not a pro in the GPU Business ... but as far as I know, the 780 has itrs FP64 (double precision Floating Point I think) Units castrated ... while the Titan has not. I'm not sure if I am exactly right here, but that what is used also by CUDA and Octane to render, no? Which means the "game" Cards are much slower for this Task?

If that's the case, was there any article about the coming Generation shedding some light on this, i.e. will a GTX 880 also be castrated? To my knowledge, the AMD's aren't so by pure power, a current R9 290x blasts any NVIDIA game Card out of the socks with regards to professional render Performance (well at least in theory,as it ha sno CUDA etc .. not sure how fast it is on OpenCL).

Can someone with a bit more knowledge on this maybe enlighten me?

[FooZe]

Hi Voon,

I'm not sure what the 800 series cards will be like, but Octane uses single precision, not double.
Hence GTX/Gaming cards work very well.

Thanks
Chris.

[voon]

Ah ... serves me right for not really knowing what I talk about Thanks for your answer! Makes me happy that I can wait for the 880 then, thanks. The 290x customs come out now ... sad that it can't be used, they're having really nice Prices it seems. Ah well.

[dtxtreme]

Hi!

Why a single precision approach in Octane? I thought double was more beneficial when it comes to render performance!?!?

/Fredrik

[acc24ex]

http://www.randomcontrol.com/arionbench

results on arion benchmarks .. as far I can see they have similar issues