Which one best 4 x GTX 580 or 2 x GTX Titan

[abdsf]

hi all
I need buy gpu , i was looking for the best gpu for big scenes , so which one is better for me

thanks

[rappet]

I wish I had two Titans instead of 4 580; less heat and more memory.. 6gB instead of 3 gB.
About speed I am not sure, but I think it is not too much difference. Gabriele must no, he has both and I think you can find more about this comparison in other post already.
Greetings,

Update: and for big scenes you need memory!
And 2 titans you can add another one or two later ( depends on mobo ofcourse),
and with four 580 the mobo is full.

[abdsf]

rapper
thank you

well , I will go with 2 x GTX Titan

[gabrielefx]

two Titans.