[NAME] and Flolivaud The motherboard revision numbers was addressed here: [URL]#20999354 [NAME], I would now like to re-share some history and then provide an update as to where we’re at. Motherboard History: -Systems manufactured before Jan 1 2017 will show A00 ( we all know this ) -Systems manufactured between Jan 1 2017 and mid February 2017 will show A02 motherboards ( I don't  have the exact date in February ) -Systems shipped after mid February 2017 will have new part numbers that will show as A00 -This is due to an internal numbering change and not a physical motherboard change. When the part number changed, the A-revision number was set back to zero ( A00 ) -These new part numbers implemented in mid February 2017 and onward are the same motherboards as  the A02 motherboards shipped between Jan 1 2017 and Mid February 2017and therefore contain the reduced noise fix. They just have different numbers on them -These new part numbers are available at the factory and are also available in service stock. They're outlined in SLN305206 ( give this document ID to Dell tech support if you call ) BIOS Update History: -After the implementation of above motherboard changes, some noise still remained -Dell worked to improve even further and on July 21st 2017 Dell released 1.3.7 BIOS which had changes in order to lower noise. The change was described in the release notes as: "Optimize CPU loading to improve EE noise" -The "Optimize CPU loading" change that was introduced in BIOS 1.3.7 caused other issues including latency between system and USB devices connected through the TB16 dock -On August 4 2017 BIOS 1.3.7 was removed and replaced with 2.1.0 -The "Optimize CPU loading" fix was carried over to 2.1.0 -On October 25th 2017 Dell released 2.3.1 in which the "Optimize CPU loading" fix was removed, resolving the USB issues Where we’re at today regarding BIOS update: -Dell has further improved the “Optimize CPU loading” solution and On December 12th 2017 XPS 13 9360 2.4.2 BIOS was released. Notes: -New 9360 systems manufactured after Jan 19th 2018 will have 2.4.2 installed at factory -BIOS 2.4.2 is meant to lower noise, not eliminate it -It’s highly likely that any remaining ‘coil noise’ heard after implementation of 2.4.2 will be deemed as working within specification Please install 2.4.2 and feel free to share your feedback here. I’ve been assured by Dell engineering that the new changes have been thoroughly tested in order to prevent the USB issue from returning.
Hi everybody, After I was so happy to have found a Linux supported laptop with very good specifications, I had to return the brand new 9350 QHD+ because of the coil whine noise. It was a real pity because I was in love with the rest, but it was simply too loud. Now I am thinking again what to buy. Is the design of the new XPS 13 Kaby Lake (9360) solving the coil whine problem? If yes, I would prefer to wait and support Dell buying the DE. I know this is not a hardware forum, but I hope that someone from Dell can give me an asnwer here. Thank you very much in advance!   
New Kaby Lake XPS 13: coil whine