General NUC Firmware updates/info:
Downloads for Intel® NUC Kit NUC6CAYH

https://downloadcenter.intel.com/product/95062/Intel-NUC-Kit-NUC6CAYH

Power Button Menu BIOS Update Instructions for Intel® NUC

https://www.intel.com/content/www/us/en/support/articles/000006030/mini-pcs.html

F7 BIOS Update Instructions for Intel® NUC

https://www.intel.com/content/www/us/en/support/articles/000005850/mini-pcs.html

BIOS Update [AYAPLCEL.86A]

https://downloadcenter.intel.com/download/28105/BIOS-Update-AYAPLCEL-86A-?product=95062

https://downloadmirror.intel.com/28105/eng/AY_0055_ReleaseNotes.pdf

CPU: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz (family: 0x6, model: 0x8e, stepping: 0xa)
Audio chip: Realtek ALC233
Graphics card: Intel Iris 655

Notes:

LMDE3 doesn't have up to date graphics drivers. Linux Mint 19 does.
Popping sound on shutdown/reboot can be removed by setting ALSA to mute the soundcard before shutting down:

sudo vi /etc/init.d/alsa-utils

uncomment the line

          mute_and_zero_levels "$TARGET_CARD" || EXITSTATUS=1

Model BSC0805HA-00
Maker Delta Electronics Inc / DC Brushless
DC 5V 0.60A

or

AVC BAZB0808R5H
DC 5V 0.50A
AVC.com

Replace fan instructions:
https://www.ifixit.com/Guide/Fix+NUC8i7BEH+overheating/131345

Sellers:
https://de.aliexpress.com/item/1005003041859874.html
https://www.aliexpress.com/item/1005002713180613.html

j4005     1559
j3455     2135
J5005     2904
i3-5005U  2903
i3-7100U  3778

i3-8109u  6167
i5-8259u  10994   NUC815BEK/BEH  HDMI2.0a/DP1.2viaUSB-C
i5-7260u  5688
i5-7300u  5964
i7-7567u  6497
i7-8559u  12214
i7-8650u  8838



https://nucblog.net/2015/07/installing-windows-7-on-the-nuc5cpyh-or-nuc5ppyh/

https://forums.intel.com/s/question/0D50P0000490V8pSAE/windows-7-on-nuc6cayh-and-similar?language=en_US

NUC6i7KYK Core i7-6770HQ 9722	

NUC6i5SYK Core i5-6260U	 4359
NUC6i5SYH Core i5-6260U	 4359
NUC6i3SYK Core i3-6100U	 3603
NUC6i3SYH Core i3-6100U	 3603

NUC5i7RYH i7-5557U	 4951
NUC5i5RYH i5-5250U	 3584
NUC5i5RYK i5-5250U	 3584
NUC5i3RYH i3-5010U	 3054
NUC5i3RYK i3-5010U	 3054

NUC5i5MYHE i5-5300U vPro 3814	
NUC5i5MYBE i5-5300U vPro 3814

NUC5i3MYHE i3-5010U	 3054
NUC5i3MYBE i3-5010U	 3054 



https://www.amazon.co.uk/Intel-BOXNUC6i7KYK3-i7-6770HQ-NUC-Kit/dp/B01FWIUZ7W
https://www.amazon.co.uk/dp/B077SL4FZG
https://www.amazon.co.uk/Corsair-CMSO8GX4M1A2133C15-Select-Mainstream-Notebook/dp/B0143UM6Y0
https://www.amazon.co.uk/Microsoft-Wired-Desktop-Business-Keyboard/dp/B01KUQTFT0/


Intel Core i5-7500 @ 3.40GHz  5163
Intel Core i5-6500 @ 3.20GHz  7244

Mint Intel Driver Config

sudo apt-get remove xserver-xorg-video-intel
sudo reboot

confirm with

inxi -G

and

grep modesetting /var/log/Xorg.0.log

To revert to Intel driver:

sudo apt-get install xserver-xorg-video-intel
sudo reboot

X 2D performance better on Intel driver vs modesetting with optimised SNA (as opposed to generic GLAMOR)

glxgears

/etc/xorg.conf.d/20-video.conf
/etc/X11/xorg.conf
Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    BusID       "PCI:0:2:0"
    Option      "AccelMethod"   "SNA"
#    Option      "AccelMethod"   "glamor"
    Option      "DRI"  "3"
EndSection

$ cat /etc/X11/xorg.conf.d/20-intel.conf 
Section "Device"
  Identifier  "Intel Graphics"
  Driver      "intel"
  Option      "AccelMethod"     "sna"
  Option      "TearFree"        "true"
  Option      "DRI"             "3"

Intel Info:
https://wiki.archlinux.org/index.php/intel_graphics