|
Other interesting things:
I'm wondering if the white data/comm plugs are being damaged and not making contact: The soldering job for those headers is really poor to be honest, and I've noticed that it seems to be easy to deform if you plug and unplug a few times. Plus when I try to reflow the solder I often find one or two pins that wiggle around when the solder is molten.
Likewise on one board finger pressure on the cable is enough to have the led light to come on 7 times (when it is testing each string) and stay on for awhile.
Anyone know the digi key part number for that plug? I'm thinking of pulling one and seeing what happens. Wouldn't be the first time something like this has happened......
|
|
|
|
|
Yawn. Good morning happy bitcoinlanders, let's see how my 9k purchase is doing....
OMG I'M D00000000MED!!!!!!
Ahem.
C
|
|
|
|
|
Anyway, been awhile, been working on things. Some thoughts about S9's:
There are 7 strings of chips in the S9, each string has 9 chips for a total of 63 total.
When you power up a S9 board without any controller, the voltage between neutral and the choke should be about 9 volts or so. This is the resting voltage, and comes out to be about 1v per hashing chip. About right.
Now, when the board is connected to a controller and you power up, you should see only 200mv or so while the controller boots. Thus the controller keps the FETs in a mostly off condition. Not totally off, as we shall see, but mostly off.
As the unit starts to boot you will see the voltage on the choke go to about 9.5 volts, then stay there. The led on the edge should flash (this is the reset command) then flash quickly for a few seconds (loading the hashes) then go solid on once running.
If you see the voltage go to 9.5, then drop to zero 7 times this is the controller trying to reset the chips. Problem is the chips are not responding, which is the most common failure.
Once the strings have checked out (each time a string is checked the LED flickers briefly) the voltage goes to about 9.6v, the lights stay on, and the unit starts hashing.
Note: You need solid power supplies to keep an S9 going and to let it start; if it doesn't see a solid 12v voltage it will refuse to start.
Note: You need two fans running. if you have only one it will start to hash then shut down within a few seconds.
Note: Slushpool works fine with S9 miners.
|
|
|
|
|
I am really tempted to go and actually purchase some bitcoins......
|
|
|
|
So just an update on my BFL space heater. I mined with it for a few months just to keep my feet warm under the desk. After that few months, the horrible thing ended up springing a nice leak of the integrated cooling fluid, and try as I might, I can not figure out how to get it sealed. So now, it is just a nice relic to look at. Thats all folks. Scrap. I may sell it on ebay as parts, but it would be more to ship than it is worth or parts. The lesson- do not attempt to use a liquid cooled miner for heat. This miner was and always will be absolute rubbish.
Back off on the hashing power a bit and they last a pretty long time. You can buy the cooling system on Ebay for $25 or so, take off the old one, clean the chips carefully, screw on the new one (has compound on it) and off you go. I'm running a pair of them to keep a room warm and they do a great job at that...... |
|
|
|
|
Problem I see with Ethereum is that there's nothing you can run on the network that you can't run much cheaper on Ethereum classic. And with less chance it will get reversed by a bunch of whining cry-babies.
|
|
|
|
I have two Monarchs that seem to have faulty temperature sensors and they stop hashing very quickly after bootup. Any way to fix the problem?
I have another with 15% HW error rate, any ideas on this?
15% error rate is not a big deal, a few engines are screaming but they don't really pull power. As long as it hashes well let it be. As for the faulty temp sensors, are you sure the water blocks are running? Listen for the water at the radiator top, then check around to see if there are any signs of leaks around the water blocks/pumps. C |
|
|
|
I'm having major issues with my 750GH/s Monarch. When i plug my 500GH/s versions into my PSU, they work fine. But when i plug my 750GH/s model in, nothing happens. I have to turn the PSUoff and on again to get it working with my 500GH/s model. Please help!
Can you check the resistance across the pcie pins to see if it's shorting out? One failure mode on the Monarchs is the high side FETs short due to overheating which crowbars the power supply. C |
|
|
|
Well this sucks, payment processors are dumping bitcoin... http://money.cnn.com/2018/01/24/technology/stripe-ends-bitcoin-payments/index.html?iid=hp-stack-domI don't like viewing bitcoin as a store of wealth, it's supposed to be used for things. That is why I accept it as payment for services. But lately I've just been using Litecoin instead... That said it looks like there are onlly 70k transactions in the queue for a total value of 1btc in fees. Which should mean spam and an ability to transfer coins a bit..... |
|
|
|
I have a new antminer - hashing board will start hashing and then around 8-48 hrs later one of them just stops hashing with all asics reporting healthy. - i swapped the controller cable with another hashing board and the problem followed the hashing board. I pulled the hashing board and everything looked new and aligned with no solder breaks (that i could see) - any ideas lightfoot  The only way to recover it now is either a reboot, which works sometimes, or a factory reset Hm. Can you watch the temps with the board running, or try moving the board to the middle and see if the problem is in the position as opposed to the board. |
|
|
|
Why stay in a country that doesn't want you. |
|
|
|
Because beliefs affect identity but its at a different logical level. So cant change the belief because "then who am I anymore?"
Oh when you fiddle with the underlying microcode in someone's brain that "who I am anymore" is an entry point for a whole new personality operating system. One you get to control, and one that can have all sorts of subtle back-doors for future ideas to be planted..... Very complicated very quickly. For extra-fun points write a meme that scans for certain backdoors installed in people, then come up with ways to exploit those....... |
|
|
|
|
Ebay is usually the go-to place, but make sure you can return it if it doesn't work. So what's wrong with your board?
|
|
|
|
God, I'd love to know how roach's brain is working so efficiently at neglecting any information that is not in compliance with his views and believes. It's astounding.
Just like with computers, it's possible to install anti-reality filters in people's brains so they only see what they want to see and anything else gets filtered out. Any time a conflicting thought comes in, it's blocked and redirected to porn or something. The real fun comes when you start hacking with a person's microcode. Then you can change who they are....... |
|
|
|
This. You're not really meant to have money that you need for bills in any class of assets in the first place. So having to withdraw is, in most cases, just a result of poor investment decisions. There are very few exceptions which are so extraordinarily rare that they won't even apply to the vast majority of people who "had to withdraw money" unless they fucked up and put in way too much to begin with. Like that guy on Twitter who took out a mortgage on his house during the Bitcoin peak and put it all in even though he has a family and kids.
In this case, Searing (and myself for different reasons) earns coins by doing work (mining for him, fixing for me). This incurs certain expenses (taxes, power, parts, shipping, etc) which must be paid for at regular intervals. So you sell coins you make at those intervals to pay the bills. A portion of my earnings goes into a long term savings/investing account, but a portion always goes into op ex, some to cap ex, and some to taxes/fees. Anything else is what we call "timing the market" or "gambling" which is not the primary purpose of the business. C |
|
|
|
I have an old Saturn I'm trying to get running for heating purposes. Dug out an old 1000W modular PSU, and borrowed a few modular PSU cables from another PSU or two... But with the 4-pin molex power connected to the control board, the PSU immediately dies. Without it plugged into the control board, the PSU fans spin up fine. Any ideas? :/
Hm. The controller board with the Beaglebone on it? I've heard of the titans blowing out their Pi's because Pi's are junk, but haven't really run across many BBB's with shorted power converters. Try pulling the BBB from the controller and see if it at least powers up. If so get a new BB, swap SIMs, and rock. They make good heaters, I have a pair of Monarchs running to keep a bedroom warm. And the things are breaking even...... :-) |
|
|
|
|
Hm. Have you tried switching the boards around a bit? I've noticed that chain 1 can run 10c hotter than the other two, I think it's due to air cavitating against the side of the box (board 3 has the heat sinks in a better air flow).
You can always slow it down 50mhz or so, they're more efficient at around 600-650mhz as opposed to 700
|
|
|
|
|
Oooooooh! You have a Pi that is using the onboard SPI signaling to talk to the miner. Yes, you can do this, but it does require that line (and you can not daisy chain more miners on).
Glad it's working.
|
|
|
|
|
Usually you would drive a high side and two low sides. The problem isn't providing gate current, it's the speed at which a normal gate switches. On a normal buck inverter most times the ground is on, with short excursions of the high side being on. Thus low side should have two FETs to ground the power line, and the high side needs just one to do the quick transition. If you put two FETs on the high side you need more gate power *and* the gates will switch more slowly due to capacitance.
On the S9 it's a bit more interesting, the voltage is closer to the median than the S7, so they felt the need for dual FETs on both sides. Which needs more gate current.
Fun stuff.
|
|
|
|
|
Show Posts
