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Concept Salvo Studios S402: ~9L Steel Console Style Case

CorerMaximus

Efficiency Noob
Nov 17, 2020
7
2
My apologies on posting so much, but does anyone have experience using a m.2 -> PCIe 4x adapter coupled with a a riser cable to add a second expansion card without using bifurcation?

I was thinking of getting one of these m.2 to PCIe slots and using a riser cable to connect attach another PCIe device (USB HUB) to the 3rd slot w/ my 2 slot GPU. This should work just fine in practice, but I was wondering if anyone has come across any weird quirks when doing something like this?
 

grsychckn

SFF Guru
Original poster
Salvo Studios
Gold Supporter
Oct 11, 2017
1,020
1,692
My apologies on posting so much, but does anyone have experience using a m.2 -> PCIe 4x adapter coupled with a a riser cable to add a second expansion card without using bifurcation?

I was thinking of getting one of these m.2 to PCIe slots and using a riser cable to connect attach another PCIe device (USB HUB) to the 3rd slot w/ my 2 slot GPU. This should work just fine in practice, but I was wondering if anyone has come across any weird quirks when doing something like this?
No worries, sorry I didn't reply earlier. I am currently working with an S402 customer who is doing just what you described. There is a problem with the PCIe risers and interference in some of the slots. For example, if we number the PCIe slots from the rear (MB mount) of the chassis up toward the vented panel, we would number them 1, 2, 3, respectively. Now, if you have to use slot #1 (nearest MB mount surface), there are no existing solutions for mounting a PCIe riser in slot #2. For slots #2 and #3, there are alternative riser orientations available that will allow them to work. You can even install in slots #1 and #3 without issue, but #1 and #2 present interference.

My solution that I'm attempting now is to use an AmeriRack PCIe 3.0 bifurcation (x8/x8) adapter mounted to the stock S402 mounts, then extending it using a "straight" PCIe riser cable from the rear of the AmeriRack bifurcation adapter into the mainboard. This solves the physical compatibility but the AmeriRack PCB needs to be modified to mount in the S402 (front holes need to be drilled and rear holes need to be opened up). I haven't yet had an opportunity to test this configuration but I hope to do so in the coming days (after I can get the remaining S402 units listed). One problem is that my drill stripped some of the wire insulation on the AmeriRack adapter when I drilled the front holes and I'm hoping I didn't nick the actual wires.

If this solution works, you'd need to purchase the AmeriRack adapter (ARC1-PELY423-CxV3) and a straight PCIe Gen 3.0 x16 riser cable. The higher-quality riser cables would work best I'm guessing because of the daisy-chain solution.

Unfortunately, I can't seem to find the AmeriRack adapter for sale anywhere. Looks like we'll need to source another option for bifurcation...
 

grsychckn

SFF Guru
Original poster
Salvo Studios
Gold Supporter
Oct 11, 2017
1,020
1,692
This one might work, but would require an adapter because the mounting holes need to be 11mm more apart (poor word choice but can't think of another way to say it right now). I like this one though because you could get a "reverse" riser that would work pretty well. I'll see if I can figure a way to adapt the mounting for that one. The technical diagram surely helps.
 

Diamorif

SFF Lingo Aficionado
Jun 9, 2020
105
27
He also does custom PCBs. I have one of the standard two-slot spacing risers from him and it's really nice. I would suspect that he would entertain custom orders for the S402 if there was enough demand.
 
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grsychckn

SFF Guru
Original poster
Salvo Studios
Gold Supporter
Oct 11, 2017
1,020
1,692
He also does custom PCBs. I have one of the standard two-slot spacing risers from him and it's really nice. I would suspect that he would entertain custom orders for the S402 if there was enough demand.
I might reach out to him but the demand definitely doesn't justify the expense for a custom PCB. More likely, I will try to develop a 3D-printed model that will support the C_Payne adapters, but I need more time to get that done. I even have a customer with one that offered to help any way they could.