Hi. I am thinking about buying a boxx GPU computer with a quadro 6000 - 12gb card and tesla K20.
I have just heard that Tesla K40 is just around the corner and this new card will also have 12gb ram.
I dont really know what these tesla cards will do for the performance of VRAY RT. Can anyone tell me what the 12 gb ram of the new tesla card will do compared to the K20 with 5 gb.
More Ram memory will handle more heavier scenes - it is always better to have more memory especially if you intent to render very heavy scenes.
When you say heavy scenes how big is this in polygons and size (mb)??
it’s more based on textures and maps.
For rough mem calculations you can check this topic http://forums.chaosgroup.com/showthread.php?74249-VRAM-calculation-for-RT-GPU&highlight=gpu+memory.
OK. I think I will go for the K40. Thanks for you help.
Actually Boxx recommends taking the Quadro k6000 cards instead of Tesla K40 cards, because of the lower price.
Get the fastest beast ever 
K40 maybe ? should have some features quadro wont…
its actually Boxx that guides me to do so, because that some of the differences between the two cards are not current for me and the use of Vray.
They say it is has some synchronization between several K40, which is good for mathematical calculations and so on..
Well boxxx things today and past. Think future! We might use that tech one day