I'm not happy with benchmarking yet. I still have to update all drivers.
Check for a firmware update for your two M.2 drives before you get too deep into everything, too. One or both of them may need a firmware update to work with newer Win10 releases, and many times applying a firmware update will blank the drive.
Also you have sort of backed yourself into a corner by splitting things up across two separate M.2 drives. You are going to want whichever one gets used MOST to be in the
upper M2_1 slot, because that is the one hooked directly to the CPU. The lower
M2_2 slot is routed through the
PCH (i.e., what passes for a "
southbridge" these days), which means whatever you slot in there is going to have to share bandwidth with your network card, all your SATA ports, most (but not all) of your USB devices, and anything you put in the lower three PCIe slots.
Your top PCIe slot, your onboard sound, your RAM, your uppermost M.2 slot, and the four USB ports inside the red rectangle on your back panel all have dedicated lines to your processor. They don't share anything with anybody else. They all get to talk directly to the CPU independently and uninterrupted by any other components. VIP status, baby!
However,
everything else on your board (all the remaining USB ports, all the SATA ports, the LAN, the lower M.2 slot, and the other three PCIe slots) all gets funneled through a x4 PCIe v4.0 link that joins the CPU to the PCH, which means they have to share the ~7.5GB/s provided by that x4 link split between all of them. That said, this should
not cause any sort of problem at all UNLESS you someday exceed that budget by replacing the lower M.2 SSD wth one that actually runs at full PCIe v4 speed, by installing an expansion card in the other x16 slot (or you fill both x1 slots simultaneously), OR you decide to hook up a whole mess of USB and/or SATA devices.
tl:dr; For best performance, don't add any future PCIe cards into your machine alongside your GPU (with one exception--you can safely add a SINGLE x1 card into the lowest
PCI_E4 slot), and if you ever decide to upgrade to a M.2 SSD that supports PCIe v
4.0, make sure you install it in the
upper M.2 slot.
--Patrick