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Snow Tiger

macrumors 6502a
Original poster
Dec 18, 2019
854
633
I am building a project in a Nehalem cMP and this card came to my attention :


It's an Ableconn PEX-UB152 with two Type-C Internal 20Pin Key-A Headers .

The darn thing is , I cannot find any cables sold in the USA that support this header .

81Ofs8wRGDL._AC_SL1500_.jpg


The funny thing is , the manufacturer claims our cMPs can support the installation of this card . It has the ASM2142 controller chip that no one seems to have actually tested in our cMPs . But still , it's worthless without the ability to connect .

The closest I could come to finding a cable would be from a German company called Delock .


Screen Shot 2020-05-02 at 5.38.03 PM.png


Screen Shot 2020-05-02 at 5.38.16 PM.png


It appears as if the rare 10 Gbps key A connector permits a single channel of USB , whereas the equally rare 10 Gbps key B connector permits dual channels of USB .
 

Krevnik

macrumors 601
Sep 8, 2003
4,094
1,301
That connector isn't in common usage yet, but there's a typo: It's really a "Type E" header that's starting to show up on motherboards, since it can feed a 20Gbps USB-C port properly. You'll get more hits for cabling looking for "Type E" (the image calls it Type F by accident). You can find adapters that export more bog-standard USB 3.0 headers that you can use as well.

Mostly this is supposed to be something case manufacturers provide cabling for hooking up to a header on the motherboard, so it's interesting a USB expansion card exposes a couple of them.
 

Snow Tiger

macrumors 6502a
Original poster
Dec 18, 2019
854
633
Thanks ! Well , what do you know ? We are one step closer to finding an use for this card . Using your suggestion , I found this cable adapter at modDIY.com :


Which is a 10 Gbps cable adapter , Type E ( as you call it ) to a standard Type A ( that everyone knows ) .

USB_3.1_Type_E_Front_Panel_Header_to_Type_A_Male_Adapter_Cable_50cm_(2)__29591_zoom.jpg


Sadly , the greedy bastards want $30 each for the cable and I could use two of them ...

Now , if only someone can confirm macOS has driver support for the ASM2142 controller chip , we'd be sure to be in business .
 

Krevnik

macrumors 601
Sep 8, 2003
4,094
1,301
That cable is very weird, and probably shouldn't even exist. It shouldn't have a male A connector on it like that, as there's nothing that should be connecting like that to a host Type E (and as far as I know, Type E is always a host-side port). It should be a female A or C connector like one of these:

Type C:

https://www.newegg.com/p/0ZK-08KJ-02BM4?Item=9SIAJX6ASM3294

Dual Type A (Using a Type E to 3.0 Header):

https://www.newegg.com/p/1W7-0025-00093?Item=9SIA9F9AJN4052
https://www.newegg.com/blue-startech-1-64-ft-usb-3-0/p/N82E16812400041

EDIT: Now that I think about it, if you had a Female-Female Type A coupler for some reason in your PC case, this would be the cable you'd use, but those are exceedingly rare.
 

dataid

macrumors regular
Feb 1, 2020
100
66
USA
Thanks ! Well , what do you know ? We are one step closer to finding an use for this card . Using your suggestion , I found this cable adapter at modDIY.com :


Which is a 10 Gbps cable adapter , Type E ( as you call it ) to a standard Type A ( that everyone knows ) .

View attachment 911577

Sadly , the greedy bastards want $30 each for the cable and I could use two of them ...

Now , if only someone can confirm macOS has driver support for the ASM2142 controller chip , we'd be sure to be in business .

Take a look at the WIKI and postings for USB 3.x PCIe Cards for Classic Mac Pro I believe that there are several who have posted on using the ASM2142 in the cMP
 

Snow Tiger

macrumors 6502a
Original poster
Dec 18, 2019
854
633
Take a look at the WIKI and postings for USB 3.x PCIe Cards for Classic Mac Pro I believe that there are several who have posted on using the ASM2142 in the cMP

I did look . There are a lot of postings and I wish someone would update the compatibility list if the reports are verified .
 

dataid

macrumors regular
Feb 1, 2020
100
66
USA
The other thought was to search for ASM2142, that should cut down the number of postings, then contact the writer with a conversation, the compatibility lists are infrequently updated.
 
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