On page 2 here
https://www.dell.com/community/Alienware-Desktops/New-Aurora-R9-1st-Look/m-p/7357909#M12355 I talked about the Aurora R5-R9 boards having a 'proprietary' front panel header (on-off, HDD LED PwrOn LED, Reset etc), also discussed here page10 HanoverB
https://www.dell.com/community/Alie...e-of-Buying-an-Aurora-R8/td-p/7348259/page/10 ... those socket 1151 Aurora boards do not have a removable rear I/O shield trim plate either
With an aftermarket board you might get a warranty & a better 'unlocked Bios', you can run 9700k 9900k (the Aurora R7 tops out at 8700k due to no Bios update for Gen9 so you'd need or want the R8 R3FWM board instead now or later), USB2.0 headers for your MIO board (vs none), 8pin CPU header (vs 4pin), maybe other reasons to go aftrmrkt; I'd prolly get an Asus & call it a day
The original R4 mthrbrd front panel diagram is below, using a typical 5x5 10pin Dupont; some Asus boards use a 10x10 20pin Dupont shown in 2nd diagram (you'd slip your 5x5 over the left-half since it appears to be same setup as original) ; browse new mthrbrd owner manual (paper or online PDF), check it against the original wiring diagram: it'll either be identical plug n play -or- you'll need to rewire / change the terminals around to make it compatible w/ new board's front panel needs
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