So my next build I'm going SLI with the NVLink (in before not worth it, shaming, etc... okay good, got that out of the way, lets proceed!). The PC will be used for gaming and web browsing 98% of it's lifetime.
That said, I was ready to go for the 9900k, due to the almost purely gaming reasons above. But reading further into it, It seems that none of the 9900k/z390 combos do x16/x16 SLI at all (or are there? I honestly don't know for sure) . Most people seem to say that x8/x8 is fine and will result in no losses or gains more then a frame or two a second. But now I came across (One of the extreme rare ones it seems) a benchmark that tested this with the latest GPUs which I intend to SLI with, in the Ashes of the Singularity: Explicit Multi-GPU PCIe Bandwidth Test section. There seems to be a 20% gain from x8/x8 to x16/x16.
My question is, is that an outlier because as the article mentions uses explicit multi-GPU via the PCIe bus? Or is it not actually an outlier because most game that have an SLI profile use multi-GPU via the bus lanes and don't lean that much on the NVLink?
Follow up question, if the above is true and x16/x16 does end up actually performing that much better then x8/x8 with a SLI setup. Does that mean that for a SLI setup, the R3900X and it's x570 due to it's x16/x16 capabilities (from what I read seems that only they do x16/x16 2-way SLI?) , does actually become the better gaming CPU in my case? I'm all very confused by this as I don't build a lot of PCs, any insight would be appreciated.
PS: Are there any other benchmarks with SLI 2080ti's out there that test this x8/x8 vs x16/x16 thing in deeper and on more games to help me make my decision?
That said, I was ready to go for the 9900k, due to the almost purely gaming reasons above. But reading further into it, It seems that none of the 9900k/z390 combos do x16/x16 SLI at all (or are there? I honestly don't know for sure) . Most people seem to say that x8/x8 is fine and will result in no losses or gains more then a frame or two a second. But now I came across (One of the extreme rare ones it seems) a benchmark that tested this with the latest GPUs which I intend to SLI with, in the Ashes of the Singularity: Explicit Multi-GPU PCIe Bandwidth Test section. There seems to be a 20% gain from x8/x8 to x16/x16.
My question is, is that an outlier because as the article mentions uses explicit multi-GPU via the PCIe bus? Or is it not actually an outlier because most game that have an SLI profile use multi-GPU via the bus lanes and don't lean that much on the NVLink?
Follow up question, if the above is true and x16/x16 does end up actually performing that much better then x8/x8 with a SLI setup. Does that mean that for a SLI setup, the R3900X and it's x570 due to it's x16/x16 capabilities (from what I read seems that only they do x16/x16 2-way SLI?) , does actually become the better gaming CPU in my case? I'm all very confused by this as I don't build a lot of PCs, any insight would be appreciated.
PS: Are there any other benchmarks with SLI 2080ti's out there that test this x8/x8 vs x16/x16 thing in deeper and on more games to help me make my decision?
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