Panos,
So if I was going to buy a second hand card, it better go with a GTX 980
with 4gb instead of a old Titan with 6gb
since the the 980 uses less power, since these cards have a 4gb geo
cache limit?
Leoung
On 29/05/2015 12:47 PM, Panagiotis Zompolas wrote:
Signature
Hey guys, Panos from Redshift here.
Just wanted to clarify that the TitanX (as well as any future compute
capability 5.2 cards with more than 4GB) does /not/ have a 4GB geo
cache limit. The 4GB limit only applies to earlier-generation
videocards, including the old Titans/Quadros.
Kind regards,
-Panos
*From:*softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] *On Behalf Of *Tim
Crowson
*Sent:* Friday, May 29, 2015 9:33 AM
*To:* softimage@listproc.autodesk.com
*Subject:* Re: Heavy scenes with the GTX 970
The Titan X is actually a really great value though, especially if
you're a Redshift user. 12GB on a $1,000 card? Once they lift the
hard-coded 4GB geo cache limit (which they really should do sooner
than later), that 12GB is going to translate into not only faster
renders, but a much better ability to handle dense scenes with
millions of instances. I broke past 1 quadrillion triangles with a
Titan Black (cramming in 32M+ instances), and I hope I get to run that
test again with a Titan X someday.
-Tim
On 5/29/2015 10:28 AM, Leoung O'Young wrote:
Hi Tim,
You could be right.
We had a gtx 570 with only 1.5gb and it was performing better than
the 970 with 4gb.
Soft is probably using the .5 of very slow memory.
Things are really slow only when we have the camera window open.
We are quite happy with the 970's in Redshift.
Would love to get our hands on the Titan X with 12gb but they are
rather expensive.
We have a gtx 670 4gb and a gtx 690 4gb but it is really 2 card in
one.
We will do some testing with those cards and report back.
Thanks,
Leoung
On 29/05/2015 10:17 AM, Tim Crowson wrote:
Yeah this could possibly be happening, but indeed the scene
would have to be pretty dense. Fire up GPU-Z and see how many
vram XSI uses. I know that for Redshift, the devs had to add a
patch just for the 970 to actually ignore the 500MB of slow
memory that Nvidia put on the 970. Or something like that. I
suppose if that section of memory is being accessed by XSI,
and since it's much slower than the rest of the on-board
memory, perhaps that could have an effect like this? I'm
talking a bit out of my area though....
(backstory: When Nvidia shipped the 970, they got a lot of
backlash.... the 970 technically does have 4GB of memory, but
500MB of that operates at a speed that makes it virtually
unusable for things like rendering (and other stuff), and
indeed early on caused dramatic performance problems and
slow-downs. So in reality, we only have 3.5GB of usable memory
to render with on that card. I do hope they don't pull that
crap again.)
-Tim
On 5/28/2015 8:51 PM, Raffaele Fragapane wrote:
If your "heavy" scene is truly heavy, past the 3.5GB mark,
you might be bumping into a known design limitation of the
970 that basically craps itself if memory usage exceeds
the 3.5 mark (even if you have 4 on board).
On Fri, May 29, 2015 at 11:37 AM, Leoung O'Young
<digim...@digimata.com <mailto:digim...@digimata.com>> wrote:
No, thanks for the suggestion.
On 28/05/2015 7:46 PM, Sven Constable wrote:
Manipulating heavy geo was a problem with ATI cards,
nvidia usually performes well. Did you add the xsi.exe in
the nvidia control panel?
sven
-----Original Message-----
From: softimage-boun...@listproc.autodesk.com
<mailto:softimage-boun...@listproc.autodesk.com>
[mailto:softimage-boun...@listproc.autodesk.com
<mailto:softimage-boun...@listproc.autodesk.com>] On
Behalf Of Leoung O'Young
Sent: Friday, May 29, 2015 1:20 AM
To: xsi
Subject: Heavy scenes with the GTX 970
We have switched some of our workstation using the GTX
970's, they preforms quite well rendering in Redshift.
A good bang for the buck. But we find the it is very
sluggish manipulating heavy geometry scenes inside
Softimage 2915.
What is a better option?
Thanks,
Leoung
--
Our users will know fear and cower before our software!
Ship it! Ship it and let them flee like the dogs they are!
--
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*/Lead CG Artist/
*Magnetic Dreams, Inc.
*2525 Lebanon Pike, Bldg C, Suite 101, Nashville, TN 37214
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