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Guest sillyeagle

Anybody proven or disproven FSX's use of SLI?

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Its a hard one to test being that its so hard to get the bottleneck off the CPU, but if one were to test at thier highest resolution using 4x4 Supersampling, which even at 1600x1200 renders the scene internally at 6400x4800, I'm sure it would be clear what kind of performace gain SLI gives. Somewhere along the line the idea was spread that FSX does not work with SLI, now whether that conclusion is based on a CPU bottleneck I don't know, becuase you clearly won't see an SLI benefit without some kind of GPU bottleneck. I know ACES has always said SLI is a driver function and there is nothing specific an application needs to do for it to work, so they say there is no reason is should not work. Even so I would like to confirm this. Right now I can ussually run 16xS Supersampling at 1600x1200 without seeing a real performace hit, which renders at twice the resolution both ways internally and combines that with 4x multisampling. If 8800 SLI can run 32xS or even 4x4 pure supersampling at 1600x1200 I just might pick up another card, but I don't want to drop the cash unless I know how effective SLI is with FSX. Some games show nearly a 100% performance gain when these cards are in SLI, and yet others show much lower gains. It would be nice to see how FSX does.

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nVidias' developer docs state it is a driver function, lets be clear - this is not something "Aces have always said" and is indeed the "word from the horses mouth" directly from IHV documentation.it is those developer docs that I quoted from in my blog post here:http://blogs.msdn.com/ptaylor/archive/2007...multi-core.aspxnote this was posted March 2007.in addition to linking to the nVidia developer docs, that blog post links to this HardOCP article on SLI herehttp://enthusiast.hardocp.com/article.html...W50aHVzaWFzdA==and this ExtremeTech article on SLI here.http://www.extremetech.com/article2/0,1697,2048529,00.aspboth of which use FSX in their comparos.that should give you a pretty good idea of where we stand with SLI, in that with high resolution and high levels of AA FSX does indeed show a benefit. ymmv as to whether or not that benefit is worth the cost.Also note from the ExtremeTech article that FSX is far from the worst performing app under SLI, contrary as that result is from community feeling about FSX and its performance.

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