LoneOmega
Meantime I've been watching the logs on this T17 and noticed that board 1 will occasionally throw this error: Looks like the chip after 14 is having an intermittent connection. Great, I love intermittent connections. So…
Hurray! I'm helping reduce global warming by making miners more efficient with this thread! When I get the Nobel prize I'll be sure to mention this forum...
I was thinking dropping the voltages manually results in better efficiency. I did wonder if they had additional regulators on the board itself to fine tune the voltage for each chip bank, but whatever they have on there…
Ok, so how did I fix that board? It was reporting only 33 chips and was dead in the water. The first clue is the chip count. The board was able to start at the bottom left and count its way up on chips. The count is in…
Any voltage drop would probably be a good indicator of a loose power connection. That would result in hilarity pretty quickly; I see why they went with bolts instead of those tabs on the S15's. And why you find burned…
Well, I'm not up to reporting it as a bug, but even with *every* "Do not tune" option off, it still wants to shut down boards in the name of "tuning". When I run the boards at say 400mhz they will run at much slower…
Another note before I write up how to reflow these chips: Braains really, really wants to auto-tune your chips. This is nice, but the auto-tuner doesn't always work right and winds up shutting down boards for long…
Well, that wasn't too complex, this T17+ is back up and running at about 45.Th. So I thought I'd post a summary of what went wrong and how I fixed it. Scenario: Board 1 and 2 would come up, then drop to zero, then come…
Ok. I just took a few sinks off here with air heat (360c) and no pre-heat. They come off pretty easily, and the solder layer is fairly thin so you should be able to put them back on with hot air at around 300c and a bit…
Yeah, the solder can get a bit soft, and I have run across boards where the problem wasn't a bad chip so much as either extruded solder balls or the like. Did the sinks go or sinks plus chips?
Ok, so a first thought: When shipping these boards I have a simple recommendation: Don't. Seriously: The design of the S17/19 series boards is different from the S7 and S9 of yore. The biggest reason are the new heat…
Reserved for summaries
Hey everyone! So, I've been getting a bunch of T17s and other mining rigs sent my way, figured it was time to start a new thread about them. Funny enough, I even get random requests to help with KNC Neptunes, but that's…
Now for the really interesting thing: The output from chiliflash. DEVICE: BitForce SC-28nm SHA256 FIRMWARE: 1.4.2 Serial Number: 4320250 ASIC Installed: 2 IAR Executed: NO PLL Latency: 48 Channel Parallelization: YES @…
She's up. Running bfgminer 4.5.0 and started hashing with no problems. Running right now with both plugs and a Corsair 500 power supply, plug area is a bit warm. Cables are not. Board temp at back is 119f right behind…
Well, it's here. 700gh sticker, solid little thing, BFL Monarch. Can't power it up because I have to go out. Will try to get it running in the Danger lab later this evening. Bad assed looking thing though, the board is…
No actually this one is in hand from a guy, I've talked to him and seems legit. I will at least run it for a day or two before taking it apart, wonder what kind of thermal mating compound I will need. One big thing will…
I will do so by next weekend. One is coming in from Ebay by Wednesday.
Well, now I did it: I am an official proud owner of a BFL 700gh monarch, just bought on Ebay for "$1,000 in Bitcoin". Great... :-) My guess is I'll have it by Wed/Thu and I'll sit down and take it apart. Because no one…
Well there is that... Very pretty.