3x sli on 1155/P67?

we have covered this before, its the limitation of the platform itself, everything else is bs pretty much, the socket 155 has only total of 16 pci lanes to give to the gpus:



rampage III on socket 1366, is a different story all together, that socket has a higher limitation, it will be the same pretty much for x79, thier limitation is 36 pci lanes, allowing for x16/x8/x8:







Edited by DST4ME - 12 Oct 2011 at 12:13am

Its bs, they claim the nf200 will beg steal and borrow to magically make 40 lanes out of 16 lanes. At the end of the day if you could compare 2600k with the p67 and the 2600k with say x79, you would see the x79 out performe the p67 due to more pci lanes.

My mobo is the 4x classified, it claims to give me x16,x16x16x16, but I don't see that.

Edited by DST4ME - 12 Oct 2011 at 1:19am

6990 and 590 are horrible ideas. also dual 6990 is quad sli which gets beat by tri sli, and to answer your question, no you can't do quad sli on a mobo that can't do tri sli.

1. Unless that video can produce 32 pci lanes that video means nothing.

2. synthetic benches have nothing to do with real world use.


this is the difference for a single card, imagine what kind of performance hit you are taking with x4 which is what you gonna be doing with quad cf:



Edited by DST4ME - 18 Oct 2011 at 4:48pm

Not sure what you mean, I didn't have time to look at that thread and to be honest it does not matter, we have looked at this many times, tri sli/cf 580/6970 will beat quad sli/cf 590/6990.

drivers mature for both cards.

also for best results with tri sli you need at least x8 lane for the 580 and x16 for 6990/590, if you don't have that you are not getting most of your cards, aka wasting your money, cause somebody with proper pci lane support can come by and blow your tri sli 580 on p67 away with their tri sli 580 on x79.

that person on that thread wants to sound like he knows what he is talking about but he does not:

1. if you want a fair comparison you need to match the vram at high res.

2. he oced the 6990 and not the sli 580, and to be realistic he also oced the hell out of his cpu, at that vcore his cpu would die before the end of the year. Also mr genius does not know that in order to do a proper test with those settings he needs the 3GB version of the cards.

As I said before we have looked at this subject every which way, and the facts are:

1. p67 can't do tri/quad sli/cf correctly.

2. quad sli/cf gets beat by tri sli/cf.

3. to get the most out of your gpus, for 580/570/6970/6950 you want x8 lane for each gpu, for 590/6990 you want x16 for each gpu, otherwise you spending Ferrari money and getting fiat performance.

4. its very simple, the platform has only 16 lanes total for gpu, people can benchmark or do whatever they like, its not gonna raise the pci lanes, or change platform's boundaries.

Edited by DST4ME - 19 Oct 2011 at 12:56am