The answer to the last question is that there is a fair bit of old school carrier grade telco equipment that uses external PSUs and whatnot. Aka, what Verizon installs for extending 2G/3G/4G (2G is still used for 911) in places where they have poor tower coverage.

However, we're in agreement. There seems to be little reason to have a case which cannot accommodate the PSU to be an internal component and allow for proper rail mounting and max density. If anything, I'd put this in the category of making things more difficult for KNC to sell to massive operations - it's annoying, but not necessarily a deal breaker. Maybe there's some other reason that I can't think of why they'd design the case as such - beats me though.

There are good reasons not to have an internal PSU, additional expense, more heat to get rid off, and there is no problem convincing customs that it's not a mains power device that requires certification. If you need other cases, have them made and perhaps sell them on eBay as well. All the BFL models except the 500GH/s use external power supplies.


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- The cost savings between the slightly smaller case can't be all that significant - I bet that any standard configuration, ordered in bulk is <$50.
- A high quality (gold rated) PSU will generate little additional heat inside the case and is obviously easy enough to design for servers with far larger power requirements.
- Customs is either going to want to open the case and look inside or they aren't. I can't imagine the size of the case nor the amount of free space inside will convince them one way or another.
- yes, the components could be moved to a case, but that takes extra time and money that shouldn't be needed. All Avalon units allow for an internal PSU. Yeah, they got stuck in customs - no I have no idea whether this is part of the reason.

I don't buy those reasons as justification - I still see this as a less efficient way to run 100+ of these units in a large operation. For the small miner (myself included) it's no issue - it's the serious mining operations that won't be as thrilled.

The Raspberry Pi Foundation tried that with the Raspberry Pi. The Pi also has an external PSU sold separately. But the Pi was delayed due to CE approval.

http://www.techspot.com/news/48006-raspberry-pi-delayed-over-confusion-about-ce-approval.html


I would hope that KnC has allocated time at SEMKO for EMC testing and compliance certification.

The CE certification for the Raspberry Pi  board was a requirement of their distribution partners, not the EU.


http://www.raspberrypi.org/archives/852


How many weeks did you say you wanted to delay shipping of the KNCminer products? I am not sure if all the other people here quite heard you.

Too many princesses in here. I don't care what it comes in, as long as it is able to hash then it's all good!

Amount of wires? One ethernet cable per unit? I can assure you that terminating T568B ethernet RJ45 connectors is not near as difficult as setting up and successfully running even a single mining rig. And that's flat out assuming you didn't just spring for pre-terminated cables. (They're not that expensive and you've already proven to me you have the capability of shopping online)
And how would an internal vs external power supply in any way affect the NUMBER of power cables?
Unless I'm missing something, you're arguing that KNC choosing to NOT implement wifi is 'dropping the ball'

Great stride towards getting that Ignore button highlighted.

Actually, I retract my statement. I see your point, now.
I demand a refund! They obviously aren't implementing bluray drives, integrated UPS backup redundancies, or even a PANIC button!
Ball-dropping amateurs. Let's go pump our money into something less proven and less likely-to-produce.

You can spin it however you want its still ball dropping, but please keep praising them blindly.

*cough* pictures of a box with fans, Pre-orders, no proof of working asic-prototype *cough*

SHEEPLE.

No the requirements are not set by the distributors. The requirements are set by the EU and the FCC and similar authorities. The distributors would not ditribibute the RPi because they did not want to get into trouble if the units would be stuck in customs, lawsuits if they caused fire, EMC disturbance, etc.

The ASUS motherboard I have in front of me right now has a CE marking even if it does not contain a power supply and only has an ATX connector.

Even if you sell only to business and not to consumers you need certification. You just have to comply with a different class of requirements (B vs A).

The RPi Foundation tried to define the unit as a research kit, but the distributors feared that it would not be accepted by the authorities as they were selling to mostly anybody, just like KnC.

Delays would be minimal if you just allocate time at SEMKO ahead of time when your first fully assembled unit arrive. If you have experience with EMC testing and requirements you should be able to pass the test. ORSoC AB should have experence in this field.