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Support for PCIe Gen4 has been a long-running subject for pre-X570 boards like B450 or X470. It seemed like this feature was enabled by motherboard vendors. We saw Asus put out a complete list of compatible boards, Biostar also enabled it and Gigabyte was the first company spotted with the feature in the F40 bios update.
Well now, It looks like Gigabyte is pulling the feature out of their boards in their latest F42A Bios Update. This new Bios also comes with the Updated microcode from AMD. This revised Agesa Microcode comes in to address a couple of issues with Ryzen 3000 processors like high voltage at idle, the Windows event logger bug and others.
Since the Gigabyte Bios Update came with an AMD microcode update, it’s unclear which one disabled PCI-E gen 4 functionality. If gigabyte was the one removing it, that’s fine, since it was added functionality in beta bios but if the Microcode update is the one that affects compatibility that means AMD might be cracking down on PCIE Gen 4. Now we won’t know which one is the culprit until all motherboard vendors update the microcode. Gigabyte is the only one that rolled out Agesa 1-0-0-3 ABB so we’ll know more by them.
I really hope this was a gigabyte decision because some customers might have purchased an ASUS or Biostar board specifically for the advertised functionality. I know I would have if I was in the market for a new PC right now. If it is gigabytes decision than people who bought an ASUS or Biostar board would benefit from the bug fixes in the new microcode, but its AMD’s then you might have to choose between bug fixes and PCIe Gen4.
I know that pre-X570 boards weren’t meant to support it and that AMD says it’s not supported but motherboard vendors test that kind of thing. That’s why Asus has a list of compatible boards where some just don’t support the standard.
TODAY’S DOSE OF TECH NEWS SOURCES
No PCIe 4.0 for pre-X570 Gigabyte : https://bit.ly/33gfDtc
X570 board with LGA 1151 Mounting Holes : https://bit.ly/2YHoEM7
ASUS RX 5700 XT Overclock : https://bit.ly/2ZxMiYQ
PowerColor Red Devil RX 5700 XT : https://bit.ly/2OFE53C
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