how can we benefit from crossfire or sli

[catstone]

crossfire / sli is a solution to premote the performance of video-subsystem. But anyhow, i raise a concern about the doubled cost. and further on, the benefit of a crossfire or sli system vs. single carded system.
1/with doubled input, how much more can we get in pecentage?
2/the benefit of crossfire/sli is based on the supportance of specific software. there might be much promotion through testing softwares. but during daily appliance, can we gain that promotion? eg. when i play WOW, can i benefit from cf./sli?

 

[gR3iF]

atm a benefit is only there in higher resolution "a real improvement"
so something like 1900x1600 turn everything on then a single 79gtx or a x19xtx will go down
a crf/sli system will do it
the other way is buy a cheap card (7600gt/1800xt) buy a second for crf/sli and you have the performance of a x1900xtx

in some way that make sense but mostlikely for a new system build buy a single card that makes your system happy.


dont forget that not everything is gpu so your ram and your cpu will do some work too
so 2gb ram and a conroe e6600 might be a good choiche for a "good" sli/crf system

you see my point?

 

[catstone]

i got it,thx.
but i still wonder if cf./sli could help in any applications. i heard that many applications can't support cf./sli, then as a result, the second card would be a total waste when running those programs.

 

[infrared]

what 'applications' are you thinking about specifically?

obviously there's no point running x1950 crossfire if your only gonna be typing letters out in microsoft word.