People are selling because the SEC is making noises? God when did HODLers become complete pansies?

Yeah, in fact it doesn't quite fit on a 4gb SD card, you need an 8gb or bigger.

Meantime been busy here working on things. Here's an interesting picture: The S9 in question is dead, and oddly enough does not respond. Checking clock signals with the scope shows clock to the end of the board but not on the other side. So I pulled the back sinks and checked. Sure enough the three test points on the bottom of the board were ok, the top ones were dead.

Pulled the heat sinks, cleared off the crud, and we see this on the third chip, bottom side:



If you look carefully on the right side of the chip you see the solder doesn't look right. What happened is either a cold solder joint from the glue factory (Bitmain) or more likely the chip overheated and melted the solder out. Either way no contact, not going to work.

Off to reflow-world....

Pretty busy, but I must have missed that particular request. A public link is:

https://www.dropbox.com/s/iz0z2bpzpcetpil/knc-lightfoot%204gb%20version.7z?dl=0

But those tend to blow up and not work, so pm me your email address and I'll send you a private link to download.

As for controllers, I'll check.

Probably wasn't the power supply; the Pi tends to blow up the bridge card. And since the Pi can run Neptune code because I did it for fun, it's perfectly acceptable on either Alt or bitcoin forums.

PM me and I'll send you a link for the code for free. Donate if you think it's cool.

As for Tarkin's code, probably not. I might be able to duplicate it but that wouldn't be too fair.

C

Yeah they had a tough time building the damn things. Main fault in retrospecitve was building such a fucking big chip; it ran so hot they couldn't run them in series like ants did, and trying to build a power step down supply that could feed the chips wound up with FETs that ran almost as hot as the chip (inefficient). A series string of 15 smaller chips would have been amazing, but they wanted to do the stupid plug it in your computer form factor.

And they were insane. Ah well, no more domestic US miner manufacturers. Ants or nothing.

Yep, got it. Just need to finish this Neptune board on the bench (yes, people still send in Neptunes from time to time, which means this thread show now go back to bitcoins :-) and I can take a look at it. Can you describe what's wrong with it and why it died?

Yeah just busy. That LED is controlled by software (you can log in and there's a command to turn them on and off, I forget what it is, but it's easy to spot) but it might be possible the fpga power chip is going weird. Is the FPGA warm?

C

Note: As the OP of this thread and the guy who has been supporting these things for years I am always concerned about changing the contents of posts. That can affect the accuracy of information which is why I leave all my research and notes intact.

If that data can be changed arbitrarially then I need to rethink using this as a source of record. Hm. Maybe we need a forum that is secured by some sort of chain of transactions, where each post is written on a sort of a chain of blocks and can't be modified after a certain point, by anyone. That would allow for a high degree of repudibility about the source of the information.

Any idea what we could use? I'd say some sort of block chain, maybe we can secure it with all these Titans lying around.

(And such begins another altcoin. Which is ok since this is in the altcoin section)

Oddly enough I didn't do it, I think the other mod did it, which was very nice of him to put this thread where it belongs so he doesn't have to worry about it anymore.

Ask him and Therymos to move the KNC one as well, hopefully the alt people won't have a problem with Meptune posts as they can also mine Bitcoin Trash. And hopefully saying that is ok in this forum. Hm....

HEY LOOK AT THAT! WE'RE IN THE ALTCOIN SECTION! NOW WE CAN TALK ABOUT ALTCOINS AND LITECOIN!

WE'RE FREE!!!!

in the meantime, we're back on the air here. If you need help fixing your Titan or fixing your Neptune (as long as you promise to only mine altcoins, I won't tell....) feel free to post!

C

Given the low levels of traffic, you really only need one node......

Eh, growing pains.

On a related note, what is with the low transaction backlog? This morning there were under 5,000 unconfirmed transactions, that's exceptionally low compared to 200k plus last month. Is this LN, the network without all the spam, or what?

C

Yeah I had to dump some at 150 for parts. Held off as long as I could, then did it.

Waafuckingah.

Yep, very busy weekend, will reply in a PM.

Edit: Weird, didn't see your message anywhere. Will PM back.
C

I have a few controllers here that I have fixed, if you need one drop me a PM.

C

Shuts down the power supply? Is it an S7 or 9?

C

Meantime down to 7,000 transactions in mempool. Either people have stopped trading or segwit is making a difference.

Hi Blake!

PM me an email address and I'll send you a link. I need to find a hosting site that will not just roll over so I can put this up, anyone got any ideas?

C

Short answer, no. The Neptunes and Titans had chips with hundreds of cores per die. So something has to go out and poll those cards and do lots of work.

For that, there's the controller board: The Beaglebone on it is just housekeeping, the real work is done by the FPGA on the side (this is also what blows out). It goes to all the cubes, all the dies, and does the get nonces and pull data from the engines.

So you need the controller, at which point you might as well plug it into the ethernet at the wall. Which if you are trying to do this at work is the #1 way to instantly get fired and another job (it's pretty easy for an admin to see you connecting to a mining pool)