Question Asus ROG CROSSHAIR X870E HERO - - - - PCIe lanes and the NVMe slots ?

[Toadyfrawg]

So I am starting a new build with an RTX 5080 GPU. I bought the X870E mobo + Ryzen 9800X3D combo from Newegg and I am trying to make sure I have the NVMe situation correct.

I am wanting to run the 5080 GPU with all 16 lanes and at least one NVMe 5.0, if not two. Do I have the gist of it or not?.
Also I could use a good case recommendation to utilize all the USB headers that this mobo has.

(From the mobo manual)
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
When M.2_3 are enabled, PCIEX16_1 will run x8, and PCIEX16_2 will run x4.
When M.2_2 and M.2_3 are enabled simultaneously, PCIEX16_2 will be disabled.**
When M.2_3 are enabled, PCIEX16_1 will run x8, and PCIEX16_2 will run x4, M.2_2 will be disabled

 

[Toadyfrawg]

Found a video explaining it well.

View: https://www.youtube.com/watch?v=csLOLHObNdQ&ab_channel=RoninWilde


As it turns out, you can only install ONE 5.0 NVMe in the M.2_1 slot without eating into your GPU PCIe lanes.