Performance comparsion of various GTX cards (including oc)

[kacperspala]

Hey there, i want to ask about something

Im considering buying 3x 580 GTX 3GB or 3x 590 GTX... The price difference is really minor.
What concerns me, is that i will need to render at 6000x6000 pix and up to 2mln polys with some 4k textures slapped on. 1.5gb on 590....... will it be enough ? Will 3GB on 580 be enough ?

because i can either have 1500 cuda cores and 3gb or 3000 cuda cores and 1.5gb for almost same price T____T it makes it really hard for me to choose .

Please help.

[t_3]

Hey there, i want to ask about something

Im considering buying 3x 580 GTX 3GB or 3x 590 GTX... The price difference is really minor.
What concerns me, is that i will need to render at 6000x6000 pix and up to 2mln polys with some 4k textures slapped on. 1.5gb on 590....... will it be enough ? Will 3GB on 580 be enough ?

because i can either have 1500 cuda cores and 3gb or 3000 cuda cores and 1.5gb for almost same price T____T it makes it really hard for me to choose .

Please help.

at 6000x6000 pixel the render target film alone will need close to 700mbytes(!), 2m polygons will take 350mbytes, a single 4k rgb map uses around 80mbytes; if you use one of the cards as main display, this will cost another 100-200mbytes - so even 3gbytes will allow only some 20 maps till all vram is consumed...

[kacperspala]

Thanks for fast reply
No, the system and ui will run on different (mobo) card.
What would you recommend ?

[t_3]

Thanks for fast reply
No, the system and ui will run on different (mobo) card.
What would you recommend ?

that means - given the same specs - you will be able to use _five_ 4k rgb maps with the 1.5gigs of the 590s. even if this is enough for now, you should take into account, that you can't upgrade vram - so the 580 seems to be the safer bet...

[kacperspala]

Thank you very much, now i am clear about what to buy. What about heat generation, should i water cool them if theyre in one case ?

[t_3]

Thank you very much, now i am clear about what to buy. What about heat generation, should i water cool them if theyre in one case ?

depends on your case and the fan configuration of the cards; if you get cards using the reference fan (at the back end of the card), and with a case like a silverstone tj07 or tj11 (highly recommended) you may stay with air cooling. custom fan configs (like those with two fans on the side) can't usually be mounted that close to each other (3 cards within 6 slots as you will need it), because the fan will only transport the heat from one card to the next one. if you have already a standard case, it'll be cheaper (and easier) to buy a new case than to equip the cards with water cooling...

[t_3]

ps - take a look at this: http://www.refractivesoftware.com/forum ... 40&t=10042

[kacperspala]

Now i know all i need. Thank you very much again

[eery]

Hi,

I just bought a licensed version for Octane and gave it a quick test. Everything seems to work fine, except the rendering time seems slower than what I experienced using the demo version.

Did some comparisons with a CPU based renderer, and for the same resolution I had lighting fast results compared to what I obtain in Octane. I have the feeling that I am not fully using the potential of my GFX card. Can somebody help me determine which factors are most likely to be linked to render performance in the case of a GPU renderer (I am new to all this)?

my setup:

ASUS G74SX-DH72,
Intel Core i7-2670QM (2.20GHz) with Turbo Boost 2.0 (max 3.10GHz),
16GB RAM,
NVIDIA GeForce GTX 560M 3GB

[roeland]

Laptop GPU's are typically slower than desktop GPU's. You should run Octane on high-end desktop GPU's.

Did you use the demo version on the same laptop, and are you rendering at the same resolution?

--
Roeland