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Author Topic: Graphics cards and memory  (Read 78821 times)

Infinite

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Re: Graphics cards and memory
« Reply #45 on: June 28, 2012, 07:14:39 PM »
Hello Lee,

Additional RAM on GPU will give small benefit in overall efficiency as compared to the same GPU with lesser amount of RAM. But it is not supposed to be considerable.
However, all other things being equal GPU with more RAM is recommended.

Thanks for the additional information Alexey  :)
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andyroo

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Re: Graphics cards and memory
« Reply #46 on: June 28, 2012, 10:29:55 PM »
If there's a better thread for benchmarks, let me know, but I figured I'd report my results since I've tried a couple different video card configurations. Here's what I have right now:

(analysis is done on 12MP images, generally around 200 - 400 images w/ 60-70% overlap)
(Machine is dual quad core Xeon 2.93 GHz w/ 48GB RAM w 2 CPUS disabled for 2 GPUs)

Device 1 performance: 91.7973 million samples/sec (CPU)
Device 2 performance: 147.254 million samples/sec (GeForce GTX 560 Ti)
Device 3 performance: 142.767 million samples/sec (GeForce GTX 560 Ti)

I am about to try a GTX 670 since by my calcs I should get close to double the compute power w/ two of those and use less $$ on electricity. The GTX 560s heat my room nicely though :)

It seems to me like the 560Ti and 670 are about where the "sweet spot" is for calculations/$

Infinite

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Re: Graphics cards and memory
« Reply #47 on: June 29, 2012, 12:36:21 PM »
I'm not sure I understand those stats but here is another example:

I've been processing some head capture expression (FACS sets) from 20x 18MP images. 100 Chunks, split over a few PC's

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Rented - PC 01, 34 Chunks started yesterday at 16:00

Core i7 3930k cpu @ 3.2GHz (Hex Core), 24GB DDR3 Ram, NVIDIA GTX570 2GB, 120GB solid state hard drive + 1TB Sata hard drive, dual 1GB networking, Windows 7 pro x64

Today, at this time PC01 is now on Chunk 25

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Dell T1600 - PC 02, 34 Chunks started yesterday at 16:00

One Intel® Xeon® E3-1270 (Quad Core, 3.4GHz, 8MB, 0GT), 16GB DDR3 Ram,  NVIDIA Quadro 600 1GB (that's right 600!), 500GB Sata hard drive+ 1TB Sata hard drive, dual 1GB networking, Windows 7 pro x64
   
Today, at this time PC02 is now on Chunk 33!

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Basically this test shows that CPU trumps GPU by a big margin. That Xeon E3-1270 3.4GHz is allot faster than the Core i7 3930k cpu @ 3.2GHz.

New GTX580 and GTX680 should arrive today for further testing.
« Last Edit: August 06, 2012, 03:13:59 PM by Infinite »
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FoodMan

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Re: Graphics cards and memory
« Reply #48 on: August 06, 2012, 02:52:39 PM »
hello... just curious..

Have you made any tests with the GTX 680 yet..?

Thanks
f/

Infinite

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Re: Graphics cards and memory
« Reply #49 on: August 06, 2012, 03:13:30 PM »
Honestly I've lost track. The GTX 580 was an improvement, the GTX680 is sat in my work machine so I don't really use it for much. I prefer the Quadro 4000 for work/art related stuff. I will test the GTX680 soon.

I have some new systems coming 2x i7-3930K, 64GB, 2xGTX680 SLI configs. Which I need for ULTRA processing, the RAM especially. I have seen stats from a 3xGPU SLI system and they were super fast.

It will be interesting to see how they fair. I will post those results soon.
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FoodMan

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Re: Graphics cards and memory
« Reply #50 on: August 06, 2012, 03:47:38 PM »
ah ok... thanks Lee..

I am about to order a new system too..

Intel Xeon E5-2600 Processors (8 cores) x2 (3.1ghz)
Intel® C600 Chipset
DIMM DDR3-1600Mhz ECC REG (256GB)
2 x 680 gtx (2gb)
water cooling

f/

Infinite

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Re: Graphics cards and memory
« Reply #51 on: August 06, 2012, 03:58:18 PM »
Wow, sweet. I would love to share some data with you to test process if you are interested and vice versa.

ah ok... thanks Lee..

I am about to order a new system too..

Intel Xeon E5-2600 Processors (8 cores) x2 (3.1ghz)
Intel® C600 Chipset
DIMM DDR3-1600Mhz ECC REG (256GB)
2 x 680 gtx (2gb)
water cooling

f/
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FoodMan

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Re: Graphics cards and memory
« Reply #52 on: August 06, 2012, 04:08:34 PM »
Hello Lee.. ok, no problem.. as soon as it arrives, I will let you know, so we can run some serious tests..

f/

FoodMan

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Re: Graphics cards and memory
« Reply #53 on: August 07, 2012, 04:37:03 PM »

N.Purple

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Re: Graphics cards and memory
« Reply #54 on: August 09, 2012, 09:27:33 AM »
We just invested in a BOXX workstation with the following specs:

Quote
W8920 Processors w/Liquid Cooling
DUAL XEON E5-2643 3.3GHz, 10MB cache, 8.00 QPI (Quad-Core) - (Extended
Lead Time)
256GB DDR3-1600 REG ECC (16 - 16GB DIMMS)
NVIDIA Quadro 4000 2GB
240GB SSD SATA 6Gb/s x2

Once we do some testing we may add a second card into the machine. If there's interest we thought that we might work with some other studios who need help processing large datasets.


Wishgranter

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Re: Graphics cards and memory
« Reply #55 on: August 09, 2012, 01:38:52 PM »
that would be wery usefull......
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N.Purple

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Re: Graphics cards and memory
« Reply #56 on: August 09, 2012, 07:26:05 PM »
Well, if you're interested shoot me a pm/email. We're thinking that part of the month we'd rent the workstation out for other studios' photoscan jobs to help us offset the expense.

We started by working with a decent workstation but we found that 32GB limit to be a problem with processing our own datasets (as some have observed in this thread, memory and compute power have been the major bottlenecks). We tried the Amazon Cloud (the HPC cluster), which did work a bit better but performance was unreliable and we were still hitting a ceiling with RAM. Rental rates for a system like this were quite expensive where we live so we finally decided to invest in a powerful system. We've already ordered it and it's scheduled to arrive next week. If anyone is interested in working with us, please let me know!

Cheers.

Wishgranter

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Re: Graphics cards and memory
« Reply #57 on: August 18, 2012, 02:42:11 PM »
Second generation NVIDIA Maximus-powered desktop workstations featuring the new NVIDIA Quadro K5000 ($2,249 MSRP, USD) plus the new NVIDIA Tesla K20 GPU ($3,199 MSRP, USD) will be available starting in December 2012. The NVIDIA Quadro K5000 will be available as a separate discrete desktop GPU starting in October 2012.


So from PRICE/PERFORMANCE is better to use the 580 cards ( 680 is fast as 580 as few reported )
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FoodMan

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Re: Graphics cards and memory
« Reply #58 on: August 18, 2012, 03:25:08 PM »
I just placed an order on 2 GTX690 4GB... let's see what these will do...

f/

Wishgranter

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Re: Graphics cards and memory
« Reply #59 on: August 18, 2012, 04:18:28 PM »
hmmmmmmmm :-)
Ok with that, but the profesional cards are worst price/performance runner. and they are even slower clocked..... so a 690 is still good decision.......
« Last Edit: August 18, 2012, 06:28:41 PM by Wishgranter »
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