X16 x8 x8 vs x8 x8 x4


Feb 27, 2010
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.



Sep 5, 2010
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%)