graphics cards for opengl?
MichaelAtOz:
Simply upgrading to the integrated graphics in the latest intel processors
(haswell i3/5/7 4xxx) should give you a very significant increase in
graphics performance.
wmartin will very likely see the same performance increase.
When it comes to graphics cards it appears to me like more expensive is
better. You get what you pay for. Note that the cheaper ones give less
performance than the integrated graphics in haswell processors.
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There were a bunch of OpenSCAD issues with Intel graphics some time ago, are
they still problematic?
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Hi!
Even on my laptop I can run complex simulations in Chrome and WebGL (f.ex
http://aleksandarrodic.com/p/jellyfish/) that are just silky smooth, while
rotating a cube in OpenSCAD is a choppy experience. Yes, sure, it's probably
a different technology, but the point is that the weakest link here isn't
the graphics card or the drivers, but OpenSCAD itself. Hopefully this will
Yes, currently there's pretty much nothing to gain in terms of performance
for OpenSCAD from a high-end graphics card. The only issue is bad OpenGL
drivers that produce wrong renders or even crashes.
On Linux both the nouveau and the proprietary nvidia driver seem to work
fine.
become better if OpenSCAD switches over to newer OpenGL technology. I think
I saw it mentioned somewhere that someone was working on that?
Mentioned yes:
https://github.com/openscad/openscad/wiki/Project%3A-Improve-OpenGL-rendering
As far as I know, there is nobody actively working on that yet. I do have
some prototyping stuff in a separate application, but nothing specific for
OpenSCAD yet.
ciao,
Torsten.
Perhaps it would be a good idea to reach out to the OpenGL community? Maybe
someone there thinks this would be a fun project to help with?
The forum at OpenGL (https://www.opengl.org/discussion_boards/) seems to be
lively. I'm sure someone there could be motivated by a well-written
forumpost where we explain what kind of challenges OpenSCAD has currently
with OpenGL.
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MichaelAtOz wrote
There were a bunch of OpenSCAD issues with Intel graphics some time ago,
are they still problematic?
This is the CPU/GPU.
I recall issues with Inter HD graphics, are they resolved? Otherwise I'd
probably add a Geoforce card.
Intel® Core™ i7-3770 Processor
(8M Cache, up to 3.90 GHz)
SPECIFICATIONS
Essentials
Status Launched
Launch Date Q2'12
Processor Number i7-3770
of Cores 4
of Threads 8
Clock Speed 3.4 GHz
Max Turbo Frequency 3.9 GHz
Intel® Smart Cache 8 MB
DMI 5 GT/s
Instruction Set 64-bit
Instruction Set Extensions SSE4.1/4.2, AVX
Embedded Options Available
Yes
Lithography 22 nm
Max TDP 77 W
Thermal Solution Specification 2011D
Recommended Customer Price BOX : $305.00
TRAY: $294.00
Memory Specifications
Max Memory Size (dependent on memory type) 32 GB
Memory Types DDR3-1333/1600
of Memory Channels 2
Max Memory Bandwidth 25.6 GB/s
ECC Memory Supported ‡
No
Graphics Specifications
Processor Graphics ‡ Intel® HD Graphics 4000
Graphics Base Frequency 650 MHz
Graphics Max Dynamic Frequency 1.15 GHz
Intel® Quick Sync Video
Yes
Intel® InTru™ 3D Technology Yes
Intel® Insider™ Yes
Intel® Wireless Display
Yes
Intel® Flexible Display Interface (Intel® FDI) Yes
Intel® Clear Video HD Technology Yes
of Displays Supported ‡ 3
Expansion Options
PCI Express Revision 3.0
PCI Express Configurations ‡ up to 1x16, 2x8, 1x8 & 2x4
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I've been noticing that Nvidia has co-processor "CUDA" cards that do not
include video out, for a good bit less money
than the graphics cards. If one were to build openSCAD from source &
link with the Nvidia math library & driver code,
any thoughts on what order of speed-up might be possible? Depends on the
nature of the math being done, no doubt,
but lots of matrix multiplies lie underneath the openSCAD primitives.
-bill
On 12/11/2014 02:40 AM, Bananapeel wrote:
MichaelAtOz:
Simply upgrading to the integrated graphics in the latest intel processors
(haswell i3/5/7 4xxx) should give you a very significant increase in
graphics performance.
wmartin will very likely see the same performance increase.
When it comes to graphics cards it appears to me like more expensive is
better. You get what you pay for. Note that the cheaper ones give less
performance than the integrated graphics in haswell processors.
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Discuss@lists.openscad.org
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wmartin wrote
If one were to build openSCAD from source &
link with the Nvidia math library & driver code,
any thoughts on what order of speed-up might be possible?
Absolutely zero unless you reprogram those parts of OpenSCAD from scratch.
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Note that the cheaper ones give less performance than the integrated
graphics in haswell processors.
For comparison. Inter HD 4000 is pretty low on the list.
gaming graphics card list
http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html
Anyway I'll give the integrated one a spin.
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Anyone have a perspective on GPU Memory consumption of OpenSCAD, any
advantage of 4BG over 2GB?
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For the record. And others interested. Marius replied, but didnt make it
here.
For comparison. Inter HD 4000 is pretty low on the list.
The Intel HD x000 GPUs have a history of bad drivers, but I think it has
improved lately. The most recent versions of OS X and Windows appear to
have much better behaving drivers.
-Marius
&
Anyone have a perspective on GPU Memory consumption of OpenSCAD, any
advantage of 4BG over 2GB?
At the moment, none.
We don’t utilize GPU memory very well. This will likely change in the
future, but we most probably won’t be large consumers of GPU mem.
-Marius
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