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Power supply for 2 GTX 580
Posted: Thu Sep 22, 2011 3:02 pm
by smicha
Dear Users,
Could you please advice me about necessary power supply for two graphics cards GTX 580 - is 1200W enough? What do you recommend?
Is octane working 100% faster with two cards comparing to one card?
Sebastian
Re: Power supply for 2 GTX 580
Posted: Thu Sep 22, 2011 3:10 pm
by cornel
I use 800W for two GTX460, never encountered any problems.
And yes, it´s nearly (!) twice the speed when using two cards of the same class.
Re: Power supply for 2 GTX 580
Posted: Thu Sep 22, 2011 4:40 pm
by smicha
Cornel,
thank you. What about cooling such a system? Any additional fans?
smicha
Re: Power supply for 2 GTX 580
Posted: Thu Sep 22, 2011 5:38 pm
by tyrot
Cornel i also would like to know your system details since ill add one more GPU too.
Re: Power supply for 2 GTX 580
Posted: Thu Sep 22, 2011 9:20 pm
by steveps3
You can get away with a 600 watt.... I do
Re: Power supply for 2 GTX 580
Posted: Fri Sep 23, 2011 3:22 am
by radiance
I would recommend at least 800 watt for 2x GTX580...
Some powersupplies can handle it and others can't at 500-600W
Radiance
Re: Power supply for 2 GTX 580
Posted: Wed Sep 28, 2011 3:25 pm
by gabrielefx
Hi All,
just now I've purchased the commercial release of Octane, I'm waiting for your email and directions on where and when download the software.
I would like also to know if is a good idea to purchase a pci express external box to fit 4 Teslas
Anyone could suggest what is the best pci 16x expander?
Best regards.
Re: Power supply for 2 GTX 580
Posted: Wed Sep 28, 2011 3:49 pm
by steveps3
four teslas!! They are over £1500 each. Man you must have pockets. In that case, buy a 1600 watt PSU!
Re: Power supply for 2 GTX 580
Posted: Sun Oct 02, 2011 3:20 pm
by gabrielefx
steveps3 wrote:four teslas!! They are over £1500 each. Man you must have pockets. In that case, buy a 1600 watt PSU!
yes, I got a renderfarm yet
I think this the right choice:
http://www.isycorp.com/i/mkg/skp.asp?id ... 36&Tab=4#0
2 Cubix cases + Teslas cost more...
Re: Power supply for 2 GTX 580
Posted: Sat Oct 22, 2011 10:33 am
by ROUBAL
Except if you actually need more than 3GB of VRAM per graphic card, I would recommand GTX 580 3GB. They cost around 600 Euros instead of 2272 Euros for the most recent Tesla C2075, and the Tesla C2075 has 448 CUDA cores instead of 512 for the GTX 580 3GB.
This said, if you can afford them, Tesla cards will allow you to do everything, so for a professionnal use it is a must.