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Author Topic: Graphics cards and memory  (Read 51105 times)

olihar

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Graphics cards and memory
« on: February 25, 2012, 12:35:29 PM »

Is there any gain for Photoscan to have a card with 3.0GB RAM instead of 1.5GB

For example you can get the GTX580 in 1.5 and 3.0 GB flavors

Often the 1.5 cards are clocked higher then the 3.0 cards so that would impact this as well.

What is the gain if any?

Infinite

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Re: Graphics cards and memory
« Reply #1 on: February 25, 2012, 05:06:30 PM »

Is there any gain for Photoscan to have a card with 3.0GB RAM instead of 1.5GB

For example you can get the GTX580 in 1.5 and 3.0 GB flavors

Often the 1.5 cards are clocked higher then the 3.0 cards so that would impact this as well.

What is the gain if any?

I would also be interested to know. Also the different between GTX580 to GTX590 and maybe even the next range that will be out soon?

Also I found the Quadro 4000 to have less Cores and be slower than the GTX570 for example.
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Wishgranter

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Re: Graphics cards and memory
« Reply #2 on: February 26, 2012, 09:14:30 AM »
different memory utilization (size) is to see when LOW, MEDIUM, HIGH, ULTRA is set, but could not compare on other configs, that mean RAM could impact performance, and the "gamer"edition" GPUs are faster than quadro line....
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Wishgranter

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Re: Graphics cards and memory
« Reply #3 on: February 27, 2012, 10:01:14 PM »
Memory use on 18Mpix photos as i remember:
LOW - 168 MB
Medium - 390 MB
HIGH - 950 MB
so a ultra will use much more memory, that mean a lot of RAM - CPU - GPU - GPU mem transfers. best app for that  http://www.ozone3d.net/gpushark/ and set detailed info...... Could test it someone ???
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olihar

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Re: Graphics cards and memory
« Reply #4 on: March 02, 2012, 02:13:25 PM »
Any more info on this, I am trying to decide if to take 1.5GB or 3.0GB GTX 580 card.

Kjellis85

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Re: Graphics cards and memory
« Reply #5 on: March 02, 2012, 03:16:56 PM »
Any more info on this, I am trying to decide if to take 1.5GB or 3.0GB GTX 580 card.

Unless you have an urgent need for it I suggest waiting for the 680 release in april (or at least that is what the rumors say). http://lenzfire.com/2012/02/entire-nvidia-kepler-series-specifications-price-release-date-43823/

olihar

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Re: Graphics cards and memory
« Reply #6 on: March 02, 2012, 07:38:59 PM »
Any more info on this, I am trying to decide if to take 1.5GB or 3.0GB GTX 580 card.

Unless you have an urgent need for it I suggest waiting for the 680 release in april (or at least that is what the rumors say). http://lenzfire.com/2012/02/entire-nvidia-kepler-series-specifications-price-release-date-43823/

Yes I have been keeping an eye on this, I will then probably take the 1.5 as its cheaper... 

Can get this one for a pretty good deal.
http://www.msi.com/product/vga/N580GTX-TWIN-FROZR-III-15D5-POWER-EDITION-OC.html

P.s. the rumored 690 looks pretty good, 2x1024 Cuda cores... pretty insane. 1000$ price to go along with it.

Wishgranter

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Re: Graphics cards and memory
« Reply #7 on: March 03, 2012, 12:31:08 AM »
But if you process a lot of data, or big assets and get payed for that, then is it best way. GTX 560ti that im using speedup the procces aroun 30-40 % even when 1 core is disabled - assigned to CPU-GPU work. so a pair or quad of 580 will speedup process significantly.....

better with 3GB then 1,5 if you work with ULTRA settings or a lot of images on high. Alexey could bring little light in the GPU mem question :-)

690 will arrive 4q2012. so if you have jobs now then is best way to get 580s and eventualey sell before 690 go for sale, they will hold good price like 285 or 480.......
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olihar

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Re: Graphics cards and memory
« Reply #8 on: March 22, 2012, 02:55:05 PM »
Memory use on 18Mpix photos as i remember:
LOW - 168 MB
Medium - 390 MB
HIGH - 950 MB
so a ultra will use much more memory, that mean a lot of RAM - CPU - GPU - GPU mem transfers. best app for that  http://www.ozone3d.net/gpushark/ and set detailed info...... Could test it someone ???

Seems like I am getting a Max of about 800MB on the GPU when using ULTRA with 21Mpix images. So its not even getting close.

Kjellis85

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Re: Graphics cards and memory
« Reply #9 on: March 22, 2012, 07:16:52 PM »
Did you buy a card yet? Because the 680 are in stores now, at least in Norway. It's priced at ca 4000 NOK or ca. 700 USD.

Wishgranter

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Re: Graphics cards and memory
« Reply #10 on: March 22, 2012, 09:32:20 PM »
Hmm. The mem use have tested in earlier version of Pscan, and how much photos have you used ? i have tested on around 35 18Mpix photos, will test over next few days, will report....

The 680 should be 3times faster in GPGPU operations, not in games, will believe when use it, because 7970 have around 3,7 Tflop and 680 just 3.1 Tflop in single precision - what is used in Pscan.......
580 around 2Tflop.....
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Wishgranter

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Re: Graphics cards and memory
« Reply #11 on: March 22, 2012, 09:50:14 PM »
http://www.tomshardware.com/reviews/geforce-gtx-680-review-benchmark,3161-15.html one of first benchmarks, here is tested in the OpenCL rendering benchmark, its possbly a 64bit - floating point that mean drivers criple potential of this card. AMD criple not id FloatingPoint performance. so a test is need in Pscan if the card have a potential for us........... for now the 7970 shold be much faster.........
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Wishgranter

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Re: Graphics cards and memory
« Reply #12 on: March 22, 2012, 09:59:41 PM »
http://www.anandtech.com/show/5699/nvidia-geforce-gtx-680-review is another review there is to find most interesting line of specification in table....

680 is crippled to just 1/24th of 32bit performance !!!!! on 580 was just 1/8 of 32bit Performance.
FP64    1/24 FP32   

http://www.anandtech.com/show/5699/nvidia-geforce-gtx-680-review/17 is tested in various Compute scenarios.......

so as i wrote, test need to be done if is this a solution for us or not......
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olihar

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Re: Graphics cards and memory
« Reply #13 on: March 23, 2012, 12:25:17 AM »
Well if this is all true it might be worth just to get another GTX 580 and have two of them.

I need CUDA for other projects so AMD is a no go for now at least.

Kjellis85

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Re: Graphics cards and memory
« Reply #14 on: March 23, 2012, 01:27:32 AM »
I see the results but I don't believe it... can they fix this with better drivers or is it fubar from a hardware perspective in relations to compute capabilities?