Yes, you can. The main difference is the cost of the adapters and that A+E slot is just one-lane PCIe.
Thank you for the explanation. You still not able to get the Udoo's M.2 key-B slot working as 2 lanes PCIe with the adapter?
What adapter? The thread is about adapting a type-M adapter into B+M. In such case, two PCIe lanes are present in the standard PCIe slot. It is up to the actual PCIe card to take advantage of it or not.
Sorry for the confusion. It is because from the statement above it seems that 2-lane PCIe is not workable yet but only working for PCIe x 1. Am I correct?
Many of these eGPU extender units (with a long cable, using USB3-like physical pin arrangement, but not USB3 protocol, of course), in the "entry level" extender (adv version will have multiple of cables to carry more signals) only offer 1-lane PCIe. It is their way of making money. Remember that they are targeting GPU market (for high performance gaming graphics and Bitcoin mining...) to take a cut from the uninitiated. If you use my approach, there is no such issue. Both approaches are doing the same except that one method costs less (and not bearing some cool names...)
My approach is to get a rather common key-M to PCIe adapter (search eBay or other sources), then cut a "B slot" to make it as a key-B to PCIe adapter.
