Uwe
I never found a complete answer when I went on a similar quest a year ago.
Some people at Adobe pointed out that their favorite cards are Quadro's, but
could not give a technical justification for them. Several pointed out, as
does Neil, that the GeForce line has more features to assist gamers than
does Quadro, but no one explained exactly what software features of graphics
cards are most necessary for video encoding and rendering functions.
Benchmarks specifically comparing video functions of Quadro against GeForce
are hard to find. Gamer's perform lots of things like tessellation, but
video never does, which is what many benchmarks focus on.
Nevertheless, benchmarks comparing CUDA capabilities shows that CUDA cores
do indeed help in an overall sense, in conjunction with sufficient memory
(there is a suspicion that if the memory is too small to contain all the
buffers necessary for all the CUDA cores, some CUDA cores may go unused).
But apparently different aspects of video processing require differing
features, and some things can't use the CUDA at all. So the more CPU threads
running, the better performance, and again, sufficient memory for each
thread. Memory bandwidth intuitively should help performance, but getting
repeatable hard numbers can be tiring!
Have fun!
Lee
From: [email protected] [mailto:[email protected]]
On Behalf Of Uwe Soltau
Sent: Monday, March 11, 2013 3:06 PM
To: [email protected]
Subject: [AP] New computer
At last - I have decided to change my steam driven computer for a new one.
I am predominantly making amateur movies but do the odd job (so far max
3 cameras).
Time is NOT the most important consideration. I want to be able to
smoothly edit AVCHD
footage in CS6 but obviously also render a bit faster than now. (26
hours for 1h 45min :-( )
I have a good idea of what to get but would like to get some advice on a
few points.
1. What are the most important points to look for on a graphics card?
Number of Cuda cores, memory or memory bandwidth or what??
I am looking at the NVIDIA GTX 650Ti , the GTX 660 or the GTX 570
The 650 Ti has 768 Cuda cores, is available with 1024 or 2048MB memory
and the memory bandwidth is
86.4 GB/s
The 660 has 960 Cuda cores, 2048 Mb memory and the bandwidth is 144,2 GB/s.
The 570 has (only) 480 Cuda cores, 1280 MB memory but the bandwidth is
152 GB/s!!!!
and that card is the most expensive one.
Would anybody have an idea what the min bandwidth for video editing
should be?
2. Does anybody do overclocking and is it advisable? I do generally
not like to push things to
the limit. Overclocking would require additional cooling (liquid).
I don't mind spending money for what I need but don't like to waste it
and rather spend it where it counts.
Any thoughts
Thanks
Uwe
[Non-text portions of this message have been removed]
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