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I'm holding my breath on thin ITX A520 boards for now and would be considering sticking with B550 or my B450 if a BIOS update comes to support the 4000 series.Given that one point with thin boards is to keep volumes as low as possible for me the only way to decrease volume is to create a custom I/O shield that is some 5mm narrower than stock. This is not really unheard of either, as narrow I/O shields exist for 1U server cases.
I'm holding my breath on thin ITX A520 boards for now and would be considering sticking with B550 or my B450 if a BIOS update comes to support the 4000 series.
Given that one point with thin boards is to keep volumes as low as possible for me the only way to decrease volume is to create a custom I/O shield that is some 5mm narrower than stock. This is not really unheard of either, as narrow I/O shields exist for 1U server cases.