Attachment uploads are currently disabled. This is a temporary situation and will resume as normal in the coming days.
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If you're referring to the REV A01, etc., number printed on the monitor, then the highest number is the most recent (newest by manufacturing date). There may a change in the manufacturing facility e.g., Mexico vs. China; a firmware update; or other undisclosed changes. I don't think Dell maintains a public list of non-firmware updates by REV number. Since no firmware is listed on the driver side and based on the other response the changes didn't include a firmware update.
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Posted July 2nd, 2021 08:00
The AW3420DW, revision differences were not provided by the Displays team. The driver page does not list any firmware update data.
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