asrock x670e pg lightning
asrock am5 motherboard using the amd x670e chipset for amd ryzen 7000, 8000 & 9000 series cpus.
which slot for the hba
most likely choice: pcie slot 3
the optimal place for your hba if you plan on using pcie slot 1.
reasons
- pcie lanes directly from cpu
- pcie 4.0 (irrespective of cpu)
- physical x16 slot, 4 data lanes (the 9500-16e can use 8 datalanes however)
- clearance under the slot for airflow
- included heatsink for slot m2_4 is low profile
if you need full sas bandwidth: pcie slot 1
if you don’t plan on using it for anything else.
reasons
- pcie lanes directly from cpu
- pcie 4.0/5.0 depending on cpu (not relevant for the 9500-16e since it’s 4.0)
- physical x16 slot, 16, 8 or 4 data lanes depending on cpu (the 9500-16e can use 8 datalanes)
- slots m2_2 and m2_3 aren’t that relevant so plenty of room for airflow
images
diagram
bandwidth routing
cpu support vs pcie support
expansion slot outtake
photo: top view
photo: side view
