Actually, I think you are right, I think this was mentioned in another
forum about that issue. Ill see if I can test QT playback on NV
hardware. Would be an interesting test.
What I was testing was more OpenGL perf, and not texture streaming.
Ill see if I can find some differences between QT playback in QC on
the machines.
Thanks !
On Dec 17, 2008, at 11:20 PM, Michael Diehr wrote:
Not sure if this helps, but the poor NVIDIA performance I'm used to
seems to be related to xferring textures between RAM and VRAM --
e.g. playback of multiple simultaneous quicktime movies. I've
done tests where the # of billboards didn't matter at all -- e.g.
once you were playing back 2 movies, you could play them back on 2
or 4 or 8 billboards and the performance was the same. My gut
instinct is that the bottleneck is transferring the bytes from RAM
to VRAM. Perhaps QC is using a texture format that needs to be de-
twiddled on the NVIDIA cards?
On Dec 17, 2008, at 5:29 PM, vade wrote:
Thats interesting. I did some tests with the newer late 2008 MBPs
with the 9600m/9400 and found that it was quite fast, especially
with my Rutt Etra plugin. http://002.vade.info/?p=24
I was able to get MUCH higher numbers of verts before slowdown
happened. I'll see if I can do some more testing, but I dont own
one so I cant measure it reliably.
What sorts of things did you notice being slower?
The Quaddro does not suprise me as being slower, from what I
understand its drivers are tuned for accuracy and not speed, and
are meant more for CAD/Architecture/Medical and not for image
processing, 3D gaming sorts of interactive tasks. I heard this
"through the grapevine" so take it with some salt :)
On Dec 17, 2008, at 2:10 PM, Florian Albrecht wrote:
Re-testing performance in BoinxTV, which is heavily based on QC,
was the first thing I did on my new MacBook Pro after updating to
10.5.6.
Sad enough I cannot see any improvement. Performance is still
worse than old ATI based MacBook Pros. In fact, it doesn't even
make a big difference whether you run on the 9400M or the 9600M GPU.
We also recently conducted some informal tests on a new Mac Pro
with a NVIDIA Quadro FX 5600 and found that Quartz Composer does
not really perform better than a previous Mac Pro model with an
ATI Radeon HD 3870. The price difference between those GPUs is
about $2,500.
The NVIDIA card is definitely a lot more capable, but Quartz
Composer does not seem to use its power on Leopard.
Greetings,
Florian Albrecht
Boinx Software.
On 17.12.2008, at 18:20, Michael Diehr wrote:
10.5.6 is out, and has "graphics improvements".
Anyone have any before/after performance tests with ATI and
NVIDIA cards?
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