Aren't M.2 slots on Intel motherboards almost exclusively from chipset? These definitely support bifurcation.
They do? So you can put a bifurcated riser into a PCH-connected PCIe slot and run more than one device off it? No, you can't. Intel only officially supports PCIe bifurcation on HEDT platforms, even if it's sometimes possible to mod their other platforms into supporting it. They do support a highly limited form of bifurcation on the x16 slots of Zx70/Zx90 series boards when allowing you to attach two GPUs at x8 each, but generally their ITX variants do not accept bifurcated risers, so this is a highly limited and specific implementation.
AMD also does not support bifurcation on consumer platforms. B350/450 comes to mind.
"AMD does not support bifurcation
on all consumer platforms" ≠ "AMD does not support bifurcation on consumer platforms". X370 and X470 support it just fine, unlike Z370 and similar Intel consumer platforms. With Intel, you have to go HEDT for bifurcation support, or mod your BIOS.
PLX are switches, this is doing 4 > 2x2 and does not need one. Clock buffer it might need, depending on how both these drives and motherboards are built.
Again: it would need one if the platform didn't support bifurcation (which Intel up until now has entirely barred from consumer platforms). That's all I was saying.
Interesting though, how would these drives show up in non-Intel board or are these functional enough without special software like RST?
If the platform supports PCIe bifurcation, they'd likely show up as two separate drives, and would probably be usable with other caching software should you want to. If the platform doesn't support bifurcation, you'd only see the device connected to the first two PCIe lanes (unless the existence of another device on the last two lanes caused a crash, that is), whichever one that may be.
With the article going on about QLC storage density and quoting intel that I wouldnt need a second storage device I was expecting at least at a minimum a 4TB capacity on this thing, only to read that the largest model is just 1TB, LoooL. Sorry but I advise anyone to stay away from QLC, as its new to the market, and essentially its ability to hold data for lengthy periods of time has not been tested, remember the first gen samsung TLC drives anyone? Reputable companies are not immune to issues. I would buy a 3D TLC drive over this.
Have you seen a single 4TB m.2 SSD? I'm pretty sure there are none, so how they would fit one onto a PCB that's already half covered by an Optane drive ... that's a challenge, for sure.