ok ! one xeon e5-4650 is almost 20% slower than a single i7 4770k however 1gtx 970 is 4X faster than the xeon e5-4650 and 1 gtx 980 TI is like 2 gtx 970 so 1gtx 980 TI is 8X faster than one xeon e5-4650 that said.
GTX 980 TI ======>> 2X(4X xeon e5-4650 32 cores)
R9 390X ======>> 2.5X(4X xeon e5-4650 32 cores)
@sharlybg, Do these results include Volumetrics, Hair, SSS and motion blur?
I ask because those things slow down much the GPU and files for benchmarks usually do not include these things.
It is also necessary to consider features that are not supported under GPU (even more in AMD).
But I really do not know anything about Xeon processors.
Volumetrics Hair and SSS are needed but not the Main used features in CYCLES. so they are also slower on CPU too ! but you have to make a choice !
2X faster rendering for most of your works with some come back to cpu rendering in extreme situation when necessary !
or 2x slower rendering compared to gpu based rig on 80% of your project but little bit faster in Volumetrics Hair and SSS !
yes you pay one cpu for GPU rig but you also need good GPU to handle heavy scene that have to be rendered on Quad xeon workstation not forget that you have to pay 4X the DDR memory in the XEon. and xeon based one is for sure the most expenssive !
Those things slow down much more the GPU than the CPU (at least in my tests)
But, Cycles is designed to get good realistic scenes, right?. So how is it possible that SSS in organic textures, smoke, hair, nice translucent materials and volumetrics are not mainly used in Cycles?
I really do not know if it would have been possible to obtain such good results in Cosmos Laundromat under GPU: https://gooseberry.blender.org/gooseberry-production-benchmark-file/
I agree with what you say about the choices that must be taken depending on the needs. “AlexB3D” should consider in what kind of scenes he plans to work, and if he really needs those expensive Xeon CPUs.
I activated experimental kernel only for SSS on GPU. If you want you use the normal kernel without using SSS. Anyway all transparencies and volumetrics used in this materials and the particles system will slow down GPU.
It is strange that your i7 is slower than mine. Are you using Windows?
Hi Grimm, thanks for doing the tests.
I hope it is only a matter of lack of optimization, and not a GPU limitation. In another thread Ace Dragon commented that some work related to CUDA split kernel have already been initiated. But I do not know if it will bring improvements in speed for these complicated materials.
The GTX 980 Ti will be faster, heres why.
The 2.7Ghz version of the Xeon E5-4650 is based on the sandy bridge architecture and it’s almost 5 years old now, even with 8 cores and 4 CPU’s it’s still lacking in rendering performance compared to a modern high end GPU. These figures from LuxMark show that a single quad core sandy bridge based processor scores 1,400, http://www.luxmark.info/node/910
In your case you would score about 11,200 since you would have 8 cores per CPU instead of 4, and 4 CPU’s instead of 1, (1,400 * 2 * 4)
However a GTX 980 Ti scores about 19,000 with LuxMark http://www.luxmark.info/node/1110
I have no idea about these Xeon processors. It is difficult to find Blender benchmarks results of these CPUs/server.
The only thing I can say is that speed difference between one GPU and one CPU is not always the same. It depends on the elements involved in the scene.
Since you are about to spend a lot of money on those Xeon, Could you ask the seller run some Blender benchmarks on that server?
You can use that scene that I shared above, that’s a difficult scene for GPU.
Gracias YAFU, pero yo no voy a hacer es inversión, estoy haciendo el diseño de producción de un estudio y tiene esas dos opciones, aunque a mi parecer, es conveniente tener las GTX para aprovechar el potencial para modelar, el tema de los servidores es que se producen nacionalmente y se puede acceder mas fácil que las tarjetas porque se compran en dolares… Hacer las pruebas no es posible ahorita, porque es por financiación y todavía no está “la pasta”