This build goes allout for efficiency, with a 32core Arm64 CPU on a brand new motherboard.

HUGE thanks to ASRock Rack, 45Homelab, Ampere, and Noctua for helping me build this system.

Parts list (some links are affiliate links):

(Motherboard) ASRock Rack ALTRAD8UD1L2T Motherboard specs: https://reurl.cc/67jk0V
(Motherboard) ASRock Rack ALTRAD8UD1L2T on NewEgg: https://reurl.cc/qrnXNp
(Case) 45Homelab HL15 + backplane + PSU: https://store.45homelab.com/configure...
(PSU) Corsair RM750e: https://amzn.to/3OyDQ79
(RAM) 4x Samsung 16GB 1Rx4 ECC RDIMM M393A2K40DB3CWE PC25600: https://amzn.to/49lCtkb
(NVMe) Kioxia XG8 2TB NVMe SSD: https://amzn.to/3Uzag5d
(CPU) Ampere Altra Q3217: https://amperecomputing.com/briefs/am...
(SSDs) 4x Samsung 8TB 870 QVO 2.5" SATA: https://amzn.to/3OylbZk
(HDDs) 6x Seagate EXOS 20TB SATA HDD: https://amzn.to/3OA2CDM
(HBA) Broadcom MegaRAID 9405W16i: https://amzn.to/3srcZOh
(Power) Comeap PCIe to 8pin CPU adapter: https://amzn.to/3Sx52o4
(Cooler) Noctua NHD9 AMP4926 4U: https://noctua.at/en/nhd9amp49264u
(Case Fans) 6x Coolerguys CG12025M12B23Y 120mmx25mm: https://amzn.to/42tTwhD

Other things mentioned in the video:

3D Printed 2.5 to 3.5" SSD to HDD adapter and other HL15 parts: https://www.printables.com/@45Drives_...
M3 x 4mm panhead screws: https://amzn.to/49wBe1K
Techno Tim's HL15 review:    • EVERYTHING You Should Know About the ...  
Raid Owl's HL15 review:    • The best home server chassis?? The 45...  
Pigeon vs Internet speed test:    • A homing pigeon is faster than my fib...  
45Homelab Forum: https://forum.45homelab.com
ServeTheHome review of ASRock Rack motherboard: https://www.servethehome.com/asrockr...

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Sponsor me on GitHub: https://github.com/sponsors/geerlingguy
Merch: https://redshirtjeff.com
2nd Channel:    / geerlingengineering  

Contents:

00:00 A unique Arm64 HL15 build
01:12 Parts & Specs
04:13 Motherboard assembly
08:27 Thermal paste application
08:44 A prototype fan
10:20 45Homelab's HL15 chassis
11:44 Will it fit?
14:17 How hard is it to press power?
16:52 It's not quiet
17:51 Hard Drives
19:02 SSDs and 3D printed adapters
19:40 First boot! (And a RAM issue)
23:14 Linux install
25:27 Idle power draw (higher than I hoped)
26:10 Rack it up!
29:17 Patch cable's too short (oops)