Graphic card manufacturers

[komyali]

I found about 29 manufacturers of graphic cards, so my question is what is best manufacturer because gtx cards of two diferent firms are not the same on tests?

I was thinking to buy 2 EVGA SLI cards and then I found that they are not going to perform as single 8gb... I mean when I open scene of 6gb it would crash RT Vray. ( Is chaos group going to change this???)

So now I am looking for single card with bigest GDDR5 because other things about GPU are not too much important... Tesla and others are too much money and doesnt give more memory than GTX cards.

http://eu.evga.com/products/moreInfo.asp?pn=04G-P4-2649-KR&family=GeForce%20600%20Series%20Family&uc=EUR

[Dimitris Tolios]

When we decide to do "research" in a subject, it is not a bad idea to use the search function in CGarchitect's forums too...information you are asking has been written by me and others in the past around the subject.

 

• SLI is currently supported only by games. Most likely it won't hurt performance, but you might have issues with drivers etc. Doesn't worth it for a workstation system.
  
• You can use multiple cards for VRay RT and other GPU accelerated renderers, but none requires you having identical cards, or SLI etc. All Compatible cards are recognized individually.
  
• The scene + assets (texture files etc) have to fit in each GPU's memory individually. Cards in SLI or not, do not share memory. Each one has to use its own and fit the whole scene.
  
• The above probably won't change very soon...rumor has it that we might be able to use main memory through PCIe, but I doubt that would be soon for someone to wait.
  
• Textures get automatically downsized to 512x512p by VRay RT. I don't know what kind of scene you have in mind reaching 6GB or more, but 3 or 4GB cards can fit a lot of stuff. I have seen great interior scenes with older, 768GB GTXs and Octane.
  
• If you have no experience with VRay RT, don't over-think it...get a system that "works", so that you can see if you can work around the limitations the GPU rendering will have, and whether you can tolerate it for your production work. Any 5xx/6xx GTX will work just fine for that. 2GB VRam will get you more than enough headroom for you to experiment before you drop a lot of money on something that might not be for you (at least in the current state).
  
• The GT 640 does have a lot of memory, but keep in mind that it has like 1/3rd-1/4th the CUDA cores of the GTX 660ti or 670. You will need 3-4 cards like that to match the performance of a 6xx GTX. I think you can get good deals on 2GB 660ti, or 2.5GB GTX 570 that are great cards.
  

Edited December 28, 2012 by dtolios

[komyali]

Search forum but didn't find what I want... Still tnx for your reply and I am still searching for render node, like people don't want to answer some questions http://forums.cgarchitect.com/72434-node-controle.html