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NVIDIA's SLI - An Introduction
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Posted by: Ion Silverbolt
Hexus.net has a good write-up on Nvidia's Sli.
You'll have to wait for the rest of the articles, but I hope the initial look at things gives you some idea of the operating modes, what SLI can get you in terms of theoretical increases and also increases (or not) in real games. AFR is the dominant mode in the drivers at the time of writing, whether or not it offers the best performance or not, but overall it's a mode that works well. You really have to sit down in front of a system and play your favourite game, using AFR, to see if it's a mode that you can use comfortably.
For Half-Life 2, Far Cry (although I didn't show it) and Doom3, AFR with a fast CPU is just what the doctor ordered keeping framerates high enough to mask the latency penalty.
Physical setup and configuration of an SLI system is a piece of cake. The continuity connector is fiddly, but you manipulate it once and leave it be.
As an aside, and I'm loathe to mention it, my general feeling from testing in the last few weeks, I have to convey that SLI as a platform doesn't actually feel finished quite yet, using pre-release hardware. The driver interface isn't great, crashes and performance issues in certain titles still persevere and two Ultra's in a loaded system get hot. Despite performance, which is undoubtedly very impressive, there's still a lot more than just framerate to consider as you ponder going down the SLI route.
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