12-29-2024 12:59 PM - edited 12-29-2024 05:26 PM
Regarding the ROG CROSSHAIR X870E HERO PCIe lanes:
I found comments on reddit here and here indicating that ANY use of M.2_2 slot will reduce the PCIEX16_ lanes...
But the documentation doesn't say anything if using M.2_1 and M.2_2 affects the lanes:
** When you use both PCIEX16_1 and PCIEX16_2, PCIEX16_1 and PCIEX16_2 will run x8.
*** 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.
My intention in acquiring this motherboard is to use 2X GPU's and also 2X M.2 GEN5.
I'm aware that the GPU's will run at x8/x8, my doubt is:
If I use = ONLY = the M.2_1 and M.2_2 slots, the PCIe lanes available to the GPUs (PCIEX16_1, PCIEX16_2) will be reduced making them to run at x8/x4, or potentially disable PCIEX16_2 entirely?
12-29-2024 01:35 PM
According to the Manual, in theory you could use M.2_1 and M.2_2 and still run 2 GPUS a X8, but the manual isin´t quite clear as you mention.