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

post #1 of 177
Thread Starter 
http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html

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Quote:
Single GPU or multi-card setup? That's a question we face every time we start a System Builder Marathon series or evaluate the worth of a flagship GPU.

Do you want a just one high-strung racehorse or a pair, trio, or quartet of draft horses? Can a team of inexpensive cards perform the work of an pricier one and still come in at a lower cumulative cost?

Welcome to Groundhog Day. Due to recurring forum questions and direct requests by our readers, we decided that it's time to go beyond the usual performance-oriented benchmarks of CrossFire- and SLI-based systems, and shed some light on the underlying principles. Frame rates in and of themselves do not necessarily translate into a high-quality experience.

Yes, we're going to tackle the issue of micro-stuttering, which seems to keep so many sensitive eyes from investing in multiple cards running in concert. We'll also look at the scaling of two, three, and four GPUs. Where is the benefit? And at what point is actual added value really realized, or is churning out high (but ultimately useless) frame rates a self-defeating exercise? As we're sure you can imagine, at some point, the pursuit of performance can become a money pit and a power hog. At the same time, we've seen multi-card setups yield incredible value.

interesting read.

i think the point of this article is that multi-GPU really only make sense on ultra-high-end builds where single fastest card still isn't fast enough.
post #2 of 177
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.
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post #3 of 177
Quote:
Originally Posted by Blameless;14671691 
I wonder if AMD dual-gpu solutions are more vulnerable to PCI-E latency/bandwidth,

why do you say that?
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post #4 of 177
I have yet to encounter "microstuttering" with my 460s. Had them.. 8-10 months I guess.

There was a thread just a few ago where a guy was asking which was less prone to MS.. Nvidia or AMD, everyone told him AMD. Perhaps they should read this article.
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post #5 of 177
That's a lot of Gainward.
post #6 of 177
Need cliffs
post #7 of 177
Not sure why they tested 6870 tri/quad-fire, considering the only way to achieve that is by using a powercolor 6870x2. Seriously doubt that drivers are optimized for such systems.
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post #8 of 177
Quote:
Originally Posted by Kasp1js;14671790 
Not sure why they tested 6870 tri/quad-fire, considering the only way to achieve that is by using a powercolor 6870x2. Seriously doubt that drivers are optimized for such systems.

some mobo's can do tripple just fine.
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post #9 of 177
Quote:
Originally Posted by Killam0n;14671808 
some mobo's can do tripple just fine.

But standard 6870's can't do trifire, they only have a single crossfire connector.
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post #10 of 177
i've been looking for this kinda stuff, nice, now onto reading:)
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