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Smallest PSU for ADT-Link setup  

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fndg
 fndg
(@fndg)
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Joined: 3 years ago
 

@joevt I won't be using the Jeyi's other ports much, so they won't pull power. I mostly went with the ThunderDock instead of the Leidian because it supports PD, freeing up a Thunderbolt port at my laptop.

Thanks for the info on the cables. I was hoping initially to use a thin ITX case (45mm), but that would require an extremely sharp bend right at the R43-ML PCB. I'll go for a 65mm case instead, which further allows me to put the Jeyi behind the GPU.

@timginter Right, I used PicuPSU as generic name for "plug-in DC-ATX". I was indeed talking about the HDPLEX unit you mention, and if I had money to burn I'd go with that plus their 200W passive PSU. Way more compact than a Dell DA-2, high quality, but overkill if you just want to power a GPU. It's a real shame they don't have a 12V PSU, or a simple 19V to 12V module.

Regarding 12V: Cincon makes very compact power supplies that use the case for conduction cooling.

I've narrowed my choice down to two models, the CFM200M12C and the CFM260S12C. They achieve 200W and 220W with passive cooling (200 and 190W respectively at 110VAC), and according to their data sheet the ripple is 150mV and 120mV respectively. The ATX spec prescribes 120mV.

I'd prefer to go with the medically rated CFM200M12C because it is only 62mm wide and would fit a 64mm case, while the CFM260S12C is 64mm wide and might just not fit into certain cases (eg. Chieftec IX-03B-OP). I'd expect the CFM200M to have a ripple below 150mV in practice, but I can't find any test reports! So now I'm a bit stuck picking between the two. Any thoughts?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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timginter
(@timginter)
Eminent Member
Joined: 2 years ago
 
Posted by: @fndg

I've narrowed my choice down to two models, the CFM200M12C and the CFM260S12C. They achieve 200W and 220W with passive cooling (200 and 190W respectively at 110VAC), and according to their data sheet the ripple is 150mV and 120mV respectively. The ATX spec prescribes 120mV.

I'd prefer to go with the medically rated CFM200M12C because it is only 62mm wide and would fit a 64mm case, while the CFM260S12C is 64mm wide and might just not fit into certain cases (eg. Chieftec IX-03B-OP). I'd expect the CFM200M to have a ripple below 150mV in practice, but I can't find any test reports! So now I'm a bit stuck picking between the two. Any thoughts?

I haven't tested a PSU outside of the ATX spec, found this thread though: https://forums.tomshardware.com/threads/is-it-possible-to-check-dc-ripple-of-a-psu-without-an-oscilloscope.3536799/ - it has a good tip on how to measure ripple with a multimeter. If the 130-150mV ripple is the only reason his rig randomly shuts down, maybe ATX's 120mV max is actually a max.

I've read capacitors on your hardware may have a shorter lifespan if ripple is too big, but haven't seen any hard data. 120mV of the second one is still borderline with the spec. If you're OK with it, you could order the PSU you'd rather and test the hell out of it in the first week Grin If the ripple causes problems you can always return it for a refund.

Not sure you need a medically rated PSU, either - the rating has no effect on voltage, ripple, etc. - it's mainly about extra reliability testing and safety, e.g. when used close to (potentially vulnerable) patients. https://electronics.stackexchange.com/questions/112994/what-is-the-difference-between-medical-grade-and-ordinary-ac-dc-power-supplies has a good answer on medical vs industrial PSUs, you can also check https://en.wikipedia.org/wiki/IEC_60601 for the exact specification.

Clevo N141ZU + Win10 + M.2 ADT R3G + Zotac RTX 2070 8GB Mini
Clevo N141ZU + Win10 + M.2 ADT R3G + Asus GTX 1060 6GB STRIX OC
Lenovo x230 + Win8.1 + EC PE4C V3.0 + Asus GTX 1060 6GB STRIX OC
Lenovo x230 + Win8.1 + EC PE4C V3.0 + Asus GTX 950 2GB STRIX OC
https://egpu.io/forums/psu-cables/dell-da-2-to-any-output-adapter

 
2018 14" Clevo N141ZU [8th,4C,U] + GTX 1060 @ 32Gbps-M.2 (ADT-Link R43SG) + Win10 // 5cm NVME extender used to create pluggable NVME port [build link]  


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