X16 x8 x8 vs x8 x8 x4

grandpatzer

Distinguished
Feb 27, 2010
249
0
18,690
I'm considering P8P67 Deluxe B3 to run 6950 in tri-fire (x8 x8 x4) but it seems as this might not be a good idea on 5760*1080 resolution.

I'm currently on m4a79t AM3 system and can can do dual 16x/16x, triple 16x/8x/8x or quad 8x/8x/8x/8x.

Seems best to just hold on to the phenom ~4ghz and tri/quad 6950?
 
@5760*1080, I think 2*HD6950 would be enough,

and I dont see the point of going QuadCFX as scaling is terrible over 3 cards.

not to mention cooling would be a major trouble with that kind of setup.

One thing that was found in this article about micro-stuttering is that trifire has almost no micro stutter, while some dual card setups have a lot: http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html

Besides, that's a large resolution, it may benefit quite a bit from trifire.



 

yumri

Distinguished
Sep 5, 2010
703
0
19,160
your problem will be more of the scaling ability of the cards and the drivers for them than the motherboard bandwidth as from the research which i have done after 2 or 3 depending on which card you get and which way you do crossfire/crossfireX you will not see any big leap in performance but if you really need a big leap i would suggest putting a single ATI FirePro V9800 or a single Quadro 6000 in instead of crossfire x4 as those work better for scaling then consumer cards also a bunch much video processors and video memory that you will be set for like 2 or 3 years with only maybe 2 if you actually need/want 3200 steaming processors just the cost is higher but crossfire x4 is more expensive then a single one of them and they can give you the same for the most part anyways.
 


It's more like 75%, but that's still good and that assumes your CPU doesn't bottleneck you, or you are using a small resolution that won't utilize the power.

But with an eyefinity setup, trifire is not a bad idea.
 


I guess it depends on the resolution. Here is something interesting: http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-10.html

At high resolutions, where the GPU's are really pushed, it does get to nearly 90% scaling, at 1080p it's more like 75%.

With 3 monitors, the trifire scaling will even be better than what is shown at 2560x1600 (140%)