Sigh. First, my earlier response was to you citing the absence of PCIe4 being mentioned on ASUS’ webpage as a supposed ‘proof’ to back up the claim of absence of PCIe4 support on ASUS motherboards with Rocket lake. I just pointed out that this was no proof. Absence of confirmation is not confirmation of absence. As for me supposedly making stuff up and “conveniently adding ASUS to the text”, perhaps you need to read again what I wrote. I wrote “as the big 4 confirmed to tech reviewers”. You see I get my information from other sources as well. Perhaps you need to do that too.
ASUS on PCIe 4.0: “ASUS has not proactively marketed PCIe 4.0 support, because information pertaining to Intel’s next-gen processors is under NDA. Full validation cannot be performed until those chips are available to motherboard vendors. Please rest assured that many of our ASUS Z490 motherboards have been engineered for PCIe 4.0 readiness.”
Source:
Andreas Schilling editor of German site
Hardwareluxx. Here are this tweets:
1,
2.
And
here is a summary about PCIe4 support on Z490 boards on OC3D.
Besides, as the experience with AMD X470 boards has shown PCIe4 support on the primary x16 slot closest to the cpu socket is possible even without forward thinking about PCIe4 support and installation of dedicated PCIe4 hardware. The advantage of the Z490 boards with dedicated support for PCIe4 is:
(a)their capability of supporting the other slots as well (this is done through an additional external base clock generator and through re-drivers that boost PCI-E 4.0 signals to longer lengths),
(b) their capability of PCIe4 bifurcation i.e. splitting the PCIe 4.0 x16 signal into x8/x8 design
(c) their capability of enabling one of the M.2 slots to get x4 PCIe4 direct lanes (since Rocket-lake will have 20 direct PCIe4 lanes (4 for the M.2) instead of 16).
In other words PCIe4 hardware is for pretty much enabling full PCIe4 support on the PCIe slots and for some even on one M.2 slot. So the “many ASUS boards” that are confirmed to support PCIe4 will get full support and those that few (lowest end) that don’t will most likely get the primary x16 slot.
Anyway I rest my case. I wasted enough of time arguying with you already.