Technology
Does AMD’s B550 support PCIe Gen 3.0 and Gen 4.0 simultaneously? – TweakTown
Ask the Experts: Pete wants to know if AMD’s B550 chipset supports running PCIe Gen 3.0 and an PCIe Gen 4.0 simultaneously.

Hi, I have a B550 motherboard (GIGABYTE B550i) and a GIGABYTE RX 5700 XT graphics card inside a custom case using a 30cm PCI-e riser cable.
The PCI-e riser cable is only gen 3.0, so I have had to set the PCIe graphics to “Gen 3.0” in BIOS (to overcome issues). My question is, can I upgrade to a PCI-e 4.0 SSD (e.g., Samsung 980 Pro) and use the SSD at PCI-e Gen 4.0 while keeping the graphics at Gen 3.0, or do I need to upgrade the riser cable to PCI-e 4.0 as well?
In other words, can the B550 chipset…
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