PCIe testing on the Raspberry Pi 5 and NAS project, part 11, the backplane

prev: https://imgur.com/gallery/ibycbb4 https://imgur.com/gallery/1cSP6JB

The SAS enclosure with backplane arrived today. It was plug and play with no issues. I also condensed the components, and box case.

The backplane adds about 4w to idle

Parts and prices at time of purchase:
m.2 hat $15:
https://www.amazon.com/gp/product/B0CPPGGDQT
fpc cable $5:
https://www.aliexpress.us/item/3256806222200934.html
m.2 x4 slot adapter $6:
https://www.microsatacables.com/pci-e-1x-4x-card-to-m-2-m-key-4-lane-adapter-with-clkreq-m2-1522-clkreq
PCIe expander (PEX8724) $69:
https://www.aliexpress.us/item/2255800570197081.html
u.2 x16 slot adapter $13:
https://www.aliexpress.us/item/3256805919627610.html
Broadcom 9440-8i $75:
eBay
Intel X710-DA2 $55:
eBay
SAS enclosure $120: https://www.aliexpress.us/item/3256805446494576.html

Requested tags:
@StackMySwitchUp

Something of note is that I ended up having to order a specifically shielded, PCIe targeted, FPC ribbon cable, to reliably run at gen3 speeds. The normal FPC ribbon cable that comes with the m.2 hats causes signal reflection and lacks shielding which causes bus errors at gen3 speeds.
Shielded PCIe ribbon cable https://www.aliexpress.us/item/3256806222200934.html

Cable hole but also airflow input. The PSU's bottom fan is an intake that blows out the rear of the PSU

view of PSU fan cutout. Air passes over the cards and then out the PSU's rear. The SAS controller went from 60c to 43c with this setup (compared passive/free air)

My frist 3D printer. Haven't gotten to mess around with it yet, but I plan to print a case to hold the pi and pcie cards