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[Toms] Micro-Stuttering And GPU Scaling In CrossFire And SLI - Page 3

post #21 of 177
Quote:
Originally Posted by Blameless;14671691 
I wonder if AMD dual-gpu solutions are more vulnerable to PCI-E latency/bandwidth, or have an issue with the NForce 200 chip. I'd like to see multiple board platforms examined.

It's TH, they won't do a proper review unless they get paid off to do one.

That said, I want to see it too...If you're reviewing something related to latency, using an NF200 (ie. Additional latency) is dumb, they should have used x58 IMO.
    
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post #22 of 177
Quote:
Originally Posted by Brutuz View Post
It's TH, they won't do a proper review unless they get paid off to do one.

That said, I want to see it too...If you're reviewing something related to latency, using an NF200 (ie. Additional latency) is dumb, they should have used x58 IMO.
Actually, both brands fair well with NF200. The additional bandwidth it adds is beneficial to both. If you're going to 3/4-way, even on x58 you have to have NF200 to maintain x16 PCIe lanes for every card. 4-way requires 2 NF200 chips(Maximum Extreme extender, Gigabyte X58A-UD9). AMD will let you run 8x for 4-way but 16x will give you better results when frame swapping higher resolutions.
post #23 of 177
I'm one of the few that doesn't even notice or possibly hasn't even had microstutter as of yet. With 2x 5770's or 2x 460's or 2x 470's, as well as some older multi-setup's in the past(4870, etc). I'm usually very picky on all things gaming so I would think I would notice something so apparently widespread, but I don't. Not sure why I don't, but I'm not going to complain.
post #24 of 177
When i game, if i drop below 60fps then i see microstuttering with the 6970's. Sometimes not using Vsync can help with this.
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post #25 of 177
Can't say I've ever experienced any microstuttering in the time I've been using Crossfire. I've always assumed people are looknig for these things and are never happy so they invent some crap to whine about.
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post #26 of 177
So in short...use 2 GTX 580s or 3 HD 6870s or don't bother an with an array of Gpus. At least thats what is seems like they are trying to push.
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post #27 of 177
Quote:
Originally Posted by Kasp1js View Post
But standard 6870's can't do trifire, they only have a single crossfire connector.
That doesnt even make any sense. Why allow the GPU to handle quad/tri and only give it one Xfire port?
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post #28 of 177
I have 2 identical GTX 275s and have experienced microstuttering quite a few times in different game titles. It is very annoying and makes me not want to do SLI/CF ever again.
 
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post #29 of 177
Quote:
We've run a number of other benchmarks and need to add, for the sake of fairness, that Nvidia's advantage is only evident if its driver is optimized for smooth frame rates rather than raw performance. The company takes certain apps, like synthetic benchmarks and commonly-tested games, and tweaks them to yield higher numbers at the expense of consistency.
So Nvidia let benchmarks go wild but tames the microstuttering in games?

Quote:
Getting the best possible results often comes down to driver installation. What is usually a fairly routine process when you use one GPU on its own can quickly turn into a test of patience when multiple cards are involved.

For example, it is rather difficult to get two Nvidia cards obtained from different vendors, which deviate from the reference specification, to cooperate in SLI. From a pool of six different GeForce GTX 580 cards, only two would work together consistently. From a pool of five different GeForce GTX 570s, only three would. We had problems mixing clock rates, BIOSes, supporting platforms, and so on.

AMD is one step ahead in the interoperability game because it only places priority on the GPU you're using. But that advantage is lost when you try to get two dual-GPU cards working together in four-way CrossFire, which led to crashes several times for us. Also, CrossFire profiles are not user-accessible; they cannot be configured or assigned freely. If you do decide to run multiple GPUs, be prepared to spend extra time battling the idiosyncrasies of more complex graphics configurations.
So Nvidia cannot SLI easily because of different BIOSes? And Crossfire profiles are not user accessible? Neither is SLI. That is why people have to edit settings with third party apps like Nvidia Inspector. For games with available crossfire settings, Crossfire can be edited by renaming the .exe or using RadeonPro.
Edited by Riou - 8/22/11 at 7:11am
post #30 of 177
not a single word on vsync...
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