Question about new card video

Alberto_Bix

Hi all,

i've just bought a Radeon RX580 but it doens't support IRAY :-(

I want to buy a new graphic card for iray rendering but i really dont know what NVIDIA i have to buy. I'm looking for a 1080 gtx but i dont read nothing about that card on the forum.

Someone can help me? Now i have:

processor; i7 3,5ghz
RAM: 16gb ddr3
motheboard: z87plus socket 1150

Richard Haseltine

This thread has benchmarks for a standard scene on various systems https://www.daz3d.com/forums/discussion/53771/iray-starter-scene-post-your-benchmarks/p1 - it's been going for a while so the earlier pages may not be of any interest now.

DrNewcenstein

Iray is an Nvidia product, and utilizes their CUDA technology, which is only found on Nvidia GPUs.

Basically, the more CUDA Cores a card has, the faster it will render in Iray. The more VRAM the card has, the more actors and objects you can have in a scene. If the elements in the scene exceed the GPU's VRAM, then Iray will default to CPU rendering instead.

The GTX1080 is one of the best Nvidia GTX-series cards you can get for Iray, surpassed only by the 1080ti and TitanXP. The 1080 has 8gb of VRAM, the 1080ti has 11gb, and the TitanXP has 12gb. Each can be bought directly from Nvidia's website for less than most retailers have them. The 1070ti is $100 cheaper than a 1080, and only has 128 fewer CUDA cores, still with 8GB of VRAM.

Processing speed of a GPU for Iray doesn't matter as much as it does for games, so what you want to look at most is Core count, VRAM, and price differences. Also, you can add multiple GPUs and their Cores will combine in Iray without using SLI (same as Crossfire, where you connect cards together with a cable). However, their VRAM doesn't stack - four 8GB cards will still mean you only have 8GB to work with. However, 4 1080s at 2560 cores each will give you over 10,000 CUDA cores, and blazing fast renders, for about $2200.