I've read the article, thanks! But it's about GPU computing without SLI, and there are actually 2 Xeon motherboards I'm aware of, that officially support quad SLI: ASUS z10pe-d8 ws and Supermicro X10DRG-Q. Both offers enough x16 PCI-E 3.0 slots to provide full x16/x16/x16/x16 quad SLI (assuming using 2 CPUs)... but is it really needed to get proper SLI scaling at 5k or 4xDSR etc.? Does it matter? Shame there are actually no benchmarks to answer this question anywhere.