Frutrated openGL user in need of laymans explanation from an openGL expert :(
Hopefully this is the place where I will get my answers. I have been struggling to get decent viewport performance with different 3D animation applications for about a period of 6 years now. I have recently started using DAZ 3D and want to upgrade my video card which is quite old GTX 460 however before I do so I want to make an informed decision before I buy versus the last time when I blew 500 euros on a completely unnecessary card that made absolutely no difference. The problem I am having is sluggish viewport performance when I build a moderate kind of scene with say a couple of buildings and a car and a person. With this kind of scene the 3D animation software becomes all but unuseable. Sluggish to a point where I cannot work anymore on the project. So. My questions are:
- does openGL use in anyway the cuda cores on a GPU? I suspect it does not but I would like to be sure and hear it from an expert.
- does the 3D application have to be designed to support a particular version of openGL? or will the same version of 3D application fully utilize each newer version/release of openGL and/or video cards?
- how important is the amount of video RAM with regards to openGL performance? Can sluggish behaviour mean that the cards memory is being overtaxed by the loaded scene?
- In terms of openGL/viewport performance in a given 3D application, will a cheap video card with say 2 GB RAM and openGL 4.4 perform exactly the same as a much more expensive video card with the same RAM and openGL version? does it make any difference?
reply from other user on daz 3D forum about GT vs GTX cards
"Anyone had any experience here with both GT and GTX cards and DAZ 3D? Is there a performance difference? If so, how much?
Thanks in advance."
"would be no difference really as DS does not use the card as such except for openGL preview
I got a GTX 760 last month and not noticed any
using a GPU renderer like Octane render etc on the other-hand would definitely be a huge difference
I got my card for iClone and it made a vast improvement"
"I use a GT 430 for Daz and donít have any problems, though it does slow down a bit if I have subD on a lot of props but thats easily fixed. I also have a GTX 680 that is used only for octane.
I have never tried the 680 on Daz as I really donít think it would make any difference. As long as your drivers are up to date and your card supports the latest openGL version it really doesnít matter what card you use. I also think the extra expense in buying an expensive GTX card if you are only going to use Daz isnít really worth it."