While the B650 chipset technically does not support PCIe 5.0 bandwidth for its PCIe x16 slot, GIGABYTE’s motherboard BIOS versions previously offered this option, although it was not operational. This misleading information came to light following user experiences shared on various forums.
GIGABYTE Removes PCIe 5.0 Option from B650 Motherboard BIOS with Update F35
The presence of PCIe 5.0 in the BIOS settings of B650 chipset motherboards was a point of intrigue among users. A Reddit user, known as u/Rejumi, reported that after upgrading their BIOS from version F34 to F35, the PCIe 5.0 option disappeared, leaving their RX 9070 XT operating solely at PCIe 4.0 x16 speeds. This development has sparked discussions regarding the implications of BIOS updates on user hardware performance.
Interestingly, at the time of publication, GIGABYTE has removed the F35 BIOS from the support page for the B650 Gaming X AX V2 rev 1.x motherboard, replacing it with BIOS version F36. Users are now faced with a choice: revert to F34, which includes PCIe 5.0 support, or update to F36, which omits the option. However, regardless of the BIOS version, PCIe 5.0 does not function on the B650 chipset, effectively providing the same performance as PCIe 4.0.
The user also noted a decrease in performance post-update, although this could stem from other variables affected by the BIOS changes. GIGABYTE has not publicly advertised PCIe 5.0 support in its B650 product line. According to forum user “Hugable Carrot”on Chiphell, complaints regarding inconsistent GPU performance at PCIe 5.0 speeds have emerged. The removal of this option may, therefore, be a proactive step to address identified issues.
Despite these changes, the PCIe 4.0 x16 interface remains more than adequate for handling the demands of top-tier NVIDIA and AMD graphics cards available today. Users of B650 motherboards, whether from GIGABYTE or others, should not experience significant performance impacts under standard conditions. However, challenges may arise if the PCIe lanes are downgraded from x16 to x8, which has been known to affect performance in models like the GeForce RTX 5060 Ti with 8GB of memory.
**Sources:** Reddit, ComputerBase
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