how about the premiums you will have to pay for new motherboards that have this proprietary nvlink. When PCIe 4.0 specs are already out with of course backwards compatibility. I can't stand companies that block other companies by strong holding developers like Intel did Nvidia is guilty of this as well I guess it is a Oregon way of thinking as their HQ's are both located in Oregon.
What about the premiums you will have to pay for motherboards that support PCIe 4.0? Besides, PCIe 4.0 is far slower than NVLINK and in workloads that care about the interface's performance, that's a big deal. Also, in the high performance sector, you tend to have to replace the board (and often many other things, if not the entire system) every time it's time for an upgrade.
AMD and Intel have advanced interface technologies they can use to compete with NVLINK if they want to.
I think that's a fair question, and it's one we asked Nvidia today at GTC. A few answers: First, as others have pointed out, the Tesla P100 version of Pascal is for HPC/Data Center applications. NVLINK is mostly GPU-to-GPU interconnect, although IBM has announced NVLINK support for its CPU as well. When we pointed out that NVLINK in a consumer class card would pose some of the problems others have pointed out, it was clear Nvidia realized this and they essentially indicated they'd be a little short sighted to expect people to be OK buying a motherboard with a proprietary interconnect. They also seemed to indicate that NVLINK can coexist with PCIe, that is, remain isolated for GPU-to-GPU communications (how much this could actually benefit typical gaming scenarios though is a big question, as someone else here pointed out). Hopefully we'll see what happens on the enthusiast side of Pascal soon enough; but Nvidia made it clear that they aren't going to talk about that this week, no matter how many ninja interrogation techniques I tried.