Jump to content
Sign in to follow this  
magneto

Is Nvidia Titan Z a worthwhile card for Houdini?

Recommended Posts

Is that limited to windows or are we talking all platforms?

 

"This contains eight billion transistors" and a 32 bit driver limiting OpenCL to 4GB :)

 

can anyone answer this?

and is this truly a fact? cause that would be a dealbreaker for me!!!

Share this post


Link to post
Share on other sites

Look for address_bits 

http://videocardz.com/55081/nvidia-geforce-gtx-titan-x-opencl-performance-leaks-out

 

"

NVIDIA GeForce GTX TITAN X OpenCL Name Value address_bits 32 compiler_available 1 double_fp_config CL_FP_DENORM CL_FP_INF_NAN CL_FP_ROUND_TO_NEAREST CL_FP_ROUND_TO_ZERO CL_FP_ROUND_TO_INF CL_FP_FMA driver_version 347.84"

 

Johner's reply

index.php

 

EDIT: Here's the GTX980/4GB in Houdini. Check the Device Addess Bits for OpenCL

 

OpenCL Platform           Apple

Platform Vendor           Apple
Platform Version          OpenCL 1.2 (Dec 14 2014 22:29:47)
OpenCL Device             GeForce GTX 980
OpenCL Type               GPU
Device Version            OpenCL 1.2 
Frequency                 1367 MHz
Compute Units             16
Device Address Bits       32
Global Memory             4096 MB
Max Allocation            1024 MB
Global Cache              0 KB
Max Constant Args         9
Max Constant Size         64 KB
Local Mem Size            48 KB
2D Image Support          16384x16384
3D Image Support          2048x2048x2048
Edited by marty

Share this post


Link to post
Share on other sites

UPDATED: Currently a bug in Nvidia driver shows that at Kepler cards do not allow for more than 4GB in OpenCL.

 

Game On! Nvidia is now 64bits & OpenCL 1.2  :) Driver 350.12.0.0

 

Platform Version          OpenCL 1.2 CUDA 7.0.0
OpenCL Device             GeForce GTX 980
OpenCL Type               GPU
Device Version            OpenCL 1.2 CUDA
Frequency                 1367 MHz
Compute Units             16
Device Address Bits       64

Edit: Even some improvement on 4GB cards! 
 
New:   3D Image Support          4096x4096x4096
Old:     3D Image Support          2048x2048x2048
 
Edited by marty

Share this post


Link to post
Share on other sites

Is this available for Linux?

With 349.16.0.0 driver Houdini detects

Device Address Bits       64

Global Memory             12287 MB

on Titan X card. Is there any way to check if it is fully supported or just 4GB of it?

 

Thanks!

  • Like 1

Share this post


Link to post
Share on other sites

There is OpenCL Smoke example in the help:

http://www.sidefx.com/docs/houdini14.0/examples/nodes/dop/smokeobject/OpenCL

 

Run this with high enough resolution and watch gpu vram consuption. On older NVidia cards it raised error (in H13.0.3xx) when it hit the 4GB ram limit in the drivers (was a litttle bit below 4 GB for nvidia gpus (that is somehere around 60 mil voxels), exact value depends on the card model and how much gpu ram is used elsewhere (hires monitors, other application consuming gpu resources etc.))

Share this post


Link to post
Share on other sites

Thanks!

 

I tested it with different resolutions (333³ , 400³ , 500³ , 1000³) and it seems to work, but when simulating above 64M voxels cached frames are the same as the first one.

So I assume that there is still some limitation.

 

At least it didn't crashed (:

Edited by rayman

Share this post


Link to post
Share on other sites

would be really cool to get some info of sidefx devs whats going on, would be too cool to use 12 gb for sims

Share this post


Link to post
Share on other sites

Update: Latest driver is reported to be 64bit OpenCL on Linux for realsss! Awaiting tests on Windows if you have a 4GB+ card. 

 

Windows:

OpenGL Renderer:          GeForce GTX 980/PCIe/SSE2

OpenGL Version:           4.5.0 NVIDIA 352.86
Platform Version          OpenCL 1.2 CUDA 7.5.8
 
Note: Flat Shaded bug is still present fixed in Houdini 14.0.344.
Edited by marty

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×