NV is not interested in promoting OpenCL, while CUDA is NV-proprietary. there are only 2 GPU vendors and they are arch enemies with no motivation to cooperate on standards. I think most developers are taking a "wait and see" approach to GPGPU (general purpose GPU) aka CUDA and OpenCL. Other than that, the speed in Surface mode has gotten really good with V4.using CPU multi-threading. I do hope he can add CUDA acceleration for the Pose needs it. He doesn't thinking the speed benefit will be noticeable enough to warrant spending a few months recompiling. Been trying to get him to do that for the longest, and he's been very reluctant thus far. I don't think Andrew is big on GPU acceleration, at this stage.so I doubt he even updates/recompiles the CUDA code anytime soon. OpenCL front still not here on 3D-Coat now or in a close future right? Though now they seem ok on my end and from my readings people are happy now.Ībout CUDA, yeah, I'll be cutting myself short on that front. Though I admit that even 3GB is not enough for serious stuff.Īs for the drivers and a ATI user myself I saw how bad things have going. Also the extra memory might become a little handy if I attempt to render anything GPU. The 7950 has a 384-bit memory bus against 256-bit of the the GTX760. You kind of convinced me right there to go with the ATI. Hey AbnRanger, thanks for the time to right a thorough answer. NVidia aggressively develops CUDA, whereas ATI doesn't spend a dime on a GPU streaming software. Once I switched to an NVidia card, the problems went away. The drivers on my 4850 would not let me use Combustion (the compositing app I was using at the time), among other things. I used to buy nothing but ATI cards for the longest, until about 4-5yrs ago. ATI cards might be a good alternative, but you hamstring yourself from being able to use any GPU renderers and ATI tends to have driver issues with CG apps. Would recommend that option until the 780 comes down in price or the next generation comes out. The 580 I bought on Ebay, has been working like a champ. It's like having a Corvette engine connected to a Cavalier transmission. seems that the low memory bus is the bottleneck. So, here you have an app like 3D Coat with (wireframe toggled on) displaying 10mill triangles +. With the 600 series, NVidia scaled BACK (instead of UP) the Memory Bus from 512 in the GTX 480 and 384 in the GTX 580, down to 256 in the 680 (the 770 is essentially a slightly upgraded 680). I don't know if the wireframe issue has been solved, with the 780. Is slightly better than the GTX 780 in terms of CUDA performance. It is still the best CUDA card outside of the Titan. So, you could either fork out the cash for a 780 or do what I did.go with a GTX 580 3GB. Plus, it seems that NVidia crippled CUDA performance in the Kepler series (a GTX 770 or lower is still Kepler architecture). I waited about a month and nothing had changed. That rep said it was a known issue and that they were looking to correct it in an upcoming driver update. I recorded a video for Andrew to see and he forwarded it to his NVidia rep. I recently bought a GTX 670 4GB, and I was severely disappointed how it struggled navigating with wireframe (in Voxel Room) toggled on. However, it's nice to know you have CUDA in your back pocket and with more and more and more GPU renderers coming onto the market (most are CUDA accelerated), it really makes sense to be ready to take advantage of them by having a newer NVidia card. So, in 3D Coat alone, I don't think you'll be hindered much by going with an ATI, instead. You can see it just in the larger number of brushes in Surface mode.not to even mention LiveClay. There is still a number of operations that are best done in Voxel Mode, but it seems Andrew has placed more focus on Surface mode the past two years. CUDA does help when you are sculpting in Voxel mode, but the brushes in Surface mode are so refined and fast, now, that they pretty much blow voxel sculpting out of the water.
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