ijustpostwhenimhi
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If I'm going to get this all in a 1U height, I need to recess the slot adapters into the case floor.
Tags: @StackMySwitchUp
The adapter is 43mm tall. The PCB section is 1mm in the floor here. If I need to go lower I'll have to make a cutout for the slot connector as well.
The PCIe card is fastened to the case with 5mm female standoffs recessed 2mm into the floor, giving the card 3mm clearance. I could probably lower it 1mm more before the backside pins run into the floor
I'll work on a fastening design for the slot adapter, but for now I'm moving on to the next PCIe card
Cat tax
Johnsky
I'm building a pi5 nas as well, but I'm doing it with a sata link. Whats with the expansion off the pcie?
ijustpostwhenimhi
10G networking and SAS controller. Numbers: >https://imgur.com/gallery/ibycbb4 Details: https://imgur.com/gallery/2hEHMlg
Johnsky
Ah, far more in-depth than mine, I'm simply network sharing the sata drive (1 Tb) and hosting plex
RoaminGnome47
I THINK its PCIe 2.0x1 so my question is what kind of speed can one get from that 10 gig card
ijustpostwhenimhi
3.0 x1, numbers: /gallery/ibycbb4 7.26/6.44 Down/Up in iperf3.
RoaminGnome47
Thanks for the info and correction. That is much higher than I would have guessedb, I thought a 4x connection was the go to for 10gig card
ijustpostwhenimhi
Gen3 is 8Gbps per lane, so x4 is a good place to be if you wanted to pull off 10G on 2 ports. You could do it with x3, and 1 port with x2, but the PCIe standard skips those. As for the x1 port on the pi5, you are correct that it is /by default/ 2.0, but it can be overdriven to 3.0 with a config.txt flag, doing so did require a shielded ribbon cable to avoid bus errors.
StackMySwitchUp
Starting to look rather neat! I can recommend those little brass inserts that you can heat so they melt into the plastic. They're in there stronger than PLA layer bonds.another advice is to make a separate IO plate so you can tweak things without having to reprint a box,you just unscrew the plate and put in a new one!
I like your filament color
ijustpostwhenimhi
Thanks, and yeah good call on the IO plate. The filament is Microcenter's Two tone matte PLA. It was on sale :) still not decided on the final material. PLA may not be great because of heat. I have ASA and CF-PETG that I was considering using. It's what I was going to use for the rack ears.
StackMySwitchUp
If its structural then pla will definitely sag under high temps, otherwise it's fine. If you keep airflow going,the temps can be much higher. A metal backing or ground plate wouldn't be a bad idea for grounding and static electricity (airflow will cause static discharge) and then you wouldn't have to worry about temps as much
ijustpostwhenimhi
I've been looking into ESD protection. There are ESD filaments but they certainly are not cheap and limited in selection. Though I do have memory of working on PS2 development kits which were essentially large plastic cases with plenty of electronics inside. Their solution seem to be adhesive copper sheets that lined all of the exposed plastic inside the case. I'll certainly do my research but it seems like a feasible option that won't blow the already strained budget lol
StackMySwitchUp
The filament is an option but i think it's infused with charcoal which can mess with your nozzle and might cause charcoal buildup on components as the system ages (this is a bit of a stretch) copper sheets seem like a solution, i know older electronics have a metallic paint sprayed on the inside, I built a server in a toshiba laptop from 1987 and the entire inside was fully conductive because of copper spray or however they did it. If anything just connect all the grounds to a common rail and
StackMySwitchUp
Keep components away from the case