|
Very interesting thing here:
Last night I added another chip to this single: It now has six chips on the right, 8 on the left. I fiddled with the fans a bit, then put everything back to stock condition (both inside ones pointing up, etc) and it hashes at 48-49gh constant with a 76-77c temp (as opposed to 75 before)
However it's now running with 2% errors instead of <1%. And in looking at the stats the errors are coming from the right side, but from all sorts of chips and *not* simply the one that I put in.
Now, my 1 volt supply is missing about 4 of the filtering capacitors because I stole them from a jalapeno, but I'm wondering if this is a filtering issue on the 1 volt line. A bit more noise coming into the chips causing increased random errors (my code shuts down bad cores to save on heat, so what remains are truly random errors). It's running fine and the overall effect on hashing is minimal (<1gh) but still something odd to note.
I'll see about ordering some more capacitors and putting them on the next time I get some chips to try out 7 chips on the unit.
C
|
|
|
|
The immersion cooling doesn't stop the chips from being ancient power-guzzling 128nm lol. Just to repeat, for the last time, the cool new immersion-technology is for the mega new AM chips coming online in March.
So he had investors sink a lot of money into a purpose built datacenter that will make it all back once "new chips" come in "March". Oh yes, that's going to work out well. :-) |
|
|
|
I should have posted a link to the article when I posted that picture. I didn't think it would need explanation here.
Anyway, that's what happened to the hash rate - industrial sized Bitcoin mining plants. Profitable mining in your parents' basement is over.
*looks over at his Single/25 hashing at 50gh *looks over at his 8 chip jalapenos hashing at 30gh each. Really? News to me. C |
|
|
|
|
Yep, the guys should dunk GPUs in the tanks and mine CATCOIN!
C
|
|
|
|
|
Technically speaking, the guy should start under-clocking his chips as difficulty grows. Power use skyrockets at a certain point on the hash/space timeline, I'm fully intending on slowing my super-clocked jalapenos and singles down in the spring (reduce heat) and in the summer (so I can run them on solar arrays).
AT which point his cooling rigs become a liability. Whatever, investors need places to waste money.
|
|
|
|
"The one that looks like a metallic woodchuck was chewing on the side?"
YES! Had he never heard of a multimaster?
It's best in your hands than mine.
I'll post pictures and funny commentary, don't worry. Maybe it was shards of metal or something. But to be honest the problem was probably that he didn't have the bottom plate in the little slots in the ends. It's um.... made that way. C |
|
|
|
 This happened.That's a custom-built Bitcoin mining facility in Hong Kong, with tens of thousand of liquid-cooled ASIC chips. Dumbest. Idea. Ever. Like taking a Porsche and encasing it in concrete. As for the jump? That's just me adding chips to Jalapenos. Sorry for the confusion :-) |
|
|
|
|
The one that looks like a metallic woodchuck was chewing on the side? Yeah, I picked that one up to check out. I'm wondering if the guy fried the FTDI chip, when the USB system won't talk that is usually it. Fortunately I have a spare chip here, so I could get it working again if that's it. Otherwise I'll have a ton of chips to re-ball.
In the meantime I put a reballed chip on my unit here. The concept of using resistance was useless, as the resistance between +1 and ground is basically 0 ohms. Which makes sense if you think that 8 chips can pull over 120 amps thus R=e/i or 1/120=.0083 ohms.
However it's working, and with 14 chips populated I'm cruising at 49gh and 76c. I did try running one fan pointing up and the other down, but I could hear one of the fans "singing" inside which means it was stalling, and temps went over 81c even with the output fan running at full speed. With both fans pointing up, the temps are 76, no stall, even with the resistor in series with the output fan to quiet it down.
On to the next thing. I'll check out this oddball single and see if it can be hacked too. Never a dull moment....
C
|
|
|
|
|
That looks like a much better power supply, and if it has a ground then the caps can reference that instead of neutral. Should prevent the problems the 2 prong one has.
Very interesting. Thanks for posting that!
|
|
|
|
|
And in the meantime, it looks like I just bought a 100% BROKEN single. So now I'll have another thing to figure out and keep me busy...
C
|
|
|
|
|
Really? Can you take a pic of the newer PS?
C
|
|
|
|
So according to my maths current conversion rate from USD to GBP for 5 chips it would cost £175 plus the cost of a jalapeño say £350 give or take depending how lucky your are, that makes it £525 plus a H100 at £100 = £625 plus postage and your time.... my maths says its cheaper to purchase a pre built rig?? I am assuming this is something you do over time and add to when you have spare funds... I just had a look at your thread on how you do it.... Gotta say its pretty bloody impressive  Also are you in the US by any chance.... I'm in the US, MD. If you don't already have a jalapeno it's not a good idea. Likewise if you need to ship internationally. Mining right now is tricky. Adding chips to an existing jalapeno makes sense, but buying a new one to do it does not. Actually buying just about any miner now does not make sense; the issue is difficulty and power increases. C |
|
|
|
It looks like one set is avalon 1 chips and the other is avalon 2.
Do either work in the Jalapenos?
No. No no no no no no no. |
|
|
|
Oh, you mean that insatbile hunger that created the very computer you sit by to type this? The hunger that made sure we had medicine and comfort enugh to live beyond the teenages.
Error here: Keep in mind that most of the increases in "lifespan" are due to kids not dying before age 16 or so. Even in Roman times if you made it to 20 you were pretty much set to live into your 60's. Nowadays, life after 70 isn't all that great. So you can live into your 80's, but how much additional fun really is there? C |
|
|
|
More to the point how on earth did you squeeeeeze that much hashing power out of that little jalapeño, If you can make that again count me in and ill hand over some BTC  Sure, it requires chips, a Corsair H100 water cooler, 300 watt power supply, bolts, lots of heat sinks, and time. But if you would like something a bit more sane, I can do a 5 chip unit that will probably not push things past the edge. Grab some chips from Ebay and send them over. 5 seems to be the optimal number, 19gh-20gh based on your original chips. Oh and my mrs thinks its great as she knows where im at 90% of the time  Same here. Keeps me out of trouble. That's a good thing. C |
|
|
|
Cool, that sounds fun. How do you go about doing that?
One step at a time to be honest. Started with a 5gh jally, then flashed it, then started thinking about more chips, then one thing led to another.... And here, as they say, we are. Basically it requires a will to try new things and wonder what the worst that can happen is. C |
|
|
|
To check the 1 volt, can't you check the resistance to ground of the 1 volt supply like you could on a Jally???
You know, I didn't think about that. If I could find the 3.3 volt test point I could also find that as well (3.3 is shared between sides). But I seem to recall a loaded jally has a very low resistance to ground. What would it be, probably under 1 ohm. I'll do that. |
|
|
|
|
No one cares about pot anymore. Now my smart meter will rat me out for mining bitcoins to the IRS.....
All part of a plan. :-)
|
|
|
|
That looks great. It makes sense on the shutdown before it overheats the quickest. I would have never thought of doing that.
Pretty much. For four chips you want the star pattern or one to the left for maximum stability. Six chips you populate the top and bottom left. Seven and eight you populate the right ones, but by then you better have bottom cooling or the Atmel/FTDI will be warm warm warm. Three chips oddly enough is a pretty bad number. The heat sink can rock forward without a chip to support it and put a lot of strain on the two side ones. Which is why oddly enough I don't do 3 chip mods. C |
|
|
|
|
Show Posts
