gtx680 and gtx580 which one is faster

[heretic]

and is 780 faster for Octane than 580 and whats the diffrent?

speed: 780 is about 30% faster than 580. Details here: http://www.tomshardware.com/reviews/gef ... 16-26.html

difference: usually GTX 780 goes with 3GB and has more max textures

price: GTX 780 here is less than double a GTX 580.

Only time I would think twice in your situation is when you get hands on a fully functional used GTX 580 below 200 EUR or if pricing is the major issue overall.

My five cents hope it helps.

[foxid]

and is 780 faster for Octane than 580 and whats the diffrent?

speed: 780 is about 30% faster than 580. Details here: http://www.tomshardware.com/reviews/gef ... 16-26.html

difference: usually GTX 780 goes with 3GB and has more max textures

price: GTX 780 here is less than double a GTX 580.

Only time I would think twice in your situation is when you get hands on a fully functional used GTX 580 below 200 EUR or if pricing is the major issue overall.

My five cents hope it helps.

thx usefull

[picajol]

In terms of power consumption, wich PSU (watts) would you have to have when running:
a) 1 x GTX780
b) 2 X GTX580

All runing on i7 3930K?

Thanx!

[smicha]

For 2x580 and 3770 550W is min. provided you choose high end psu. 700W-800W is more than enough.

If I were you I'd buy 1200W-1500W for further 3-4 x TITANS if you plan to rebuild your system.

[heretic]

Here you go - exact figures for all ya PC needs

http://www.extreme.outervision.com/psuc ... orlite.jsp

[picajol]

For 2x580 and 3770 550W is min. provided you choose high end psu. 700W-800W is more than enough.

If I were you I'd buy 1200W-1500W for further 3-4 x TITANS if you plan to rebuild your system.

I was talking aboth 3930K...R U shure were talking aboth same CPU?
Looking at this calculation chart seems that 850W would MAYBE be sufficient...

[smicha]

I had 2x580 and it drew max 480W during rendering. (watercooled, overclocked,...)

[picajol]

Can two different cards be set for rendering eg. 1xGTX589 and 1xGTX680?
I read that for SLI you have to have two same cards....maybe Im wrong

[smicha]

Yes, they can. But the amount of vram is set to the minimal of those.