Will, can you also look into the PCI-E Layout for the M.2 Drives? I know for the X470D4U the actual lane assignments and speeds were a little weird, with one being PCIE2 x4 and one being PCIE3 x2.
I'm interested to see how the Gen4 link to the chipset gave them wiggle room.
From the spec Sheet:
www.asrockrack.com
They say both M.2 are both X4 4.0 lanes, but they are over-committed. So I am a bit confused.
Ryzen has 20 PCIE lanes plus 4 for the chipset, for a total of 24.
If you add up the x16 slot(which switches to x8 when the x8 slot is populated), the x8 slot, the 4x M.2 (CPU) slot, and the PCIE 1X slot, you get 21.
So, I'm assuming the 1X slot goes to the chipset.
Now, we have the 4 lanes going to the chipset. Then we have one of the m.2 slots, which is a 4 lane device (and well assume you are using a Gen 3 SSD), the 10Gig lan, and the 1X slot eating up the rest of the Gen-4 bandwidth gains. They really should NOT have advertised that M.2 as a PCIe Gen 4 capable slot, because there is not enough bandwidth to support that.
There might
just barely be enough bandwidth to support all of those things on the chipset with a Gen 3 SSD, but if you can find a way to comparativley test the two boards I would find that
fascinating.
Additionally, I am very saddened that they have one m.2 22110 and one 2280....that means only 1 enterpise-class m.2 stick this time.