So I'm a little new at this, have my first SP20 running almost a week now (took most of that week to read all of this thread  ). I had one of my New CX750M's die (sending it back for exchange), so in the mean time trying to set things in the safe zone with only 1 PSU with 750. I need some input from the pros to know if I'm in the zone. Current Settings: Fan Speed: Auto Start Volts Unit 1 .665 Start Volts Unit 2 .65 Start Volts Unit 3 .645 Start Volts Unit 4 .628 Voltage Limit .67 Max PSU Power Unit 1 180 Max PSU Power Unit 2 180 Max PSU Power Unit 3 180 Max PSU Power Unit 4 180 I'm getting consistent 1250 - 1275 Ghs and my temps are good, one yellow @780hx on loop 0. Just need to know if I'm missing something or Good to go? 2.6.14 Uptime:58563 | FPGA ver:100 | BIST in 79 -----BOARD-0----- PSU[UNKNOWN]: 0->(169w/169w)[169 169 169] (->169w[169 169 169]) (lim=180) 0c 308GH cooling:0/0x0 -----BOARD-1----- PSU[UNKNOWN]: 0->(176w/176w)[176 175 175] (->176w[176 175 175]) (lim=180) 0c 314GH cooling:0/0x0 -----BOARD-2----- PSU[UNKNOWN]: 0->(177w/177w)[177 177 177] (->177w[177 177 177]) (lim=180) 0c 322GH cooling:0/0x0 -----BOARD-3----- PSU[UNKNOWN]: 0->(175w/175w)[175 175 175] (->175w[175 175 175]) (lim=180) 0c 322GH cooling:0/0x0 LOOP[0] ON TO:0 (w:8335) 0: DC2DC/1/:[vlt1:667 vlt2:669(DCl:794 Tl:794 Ul:669) 66W 98A 55c] ASIC:[ 85c (125c) 780hz(BL: 780) 4023 (E:193) F:0 L:0] 1: DC2DC/1/:[vlt1:664 vlt2:669(DCl:794 Tl:794 Ul:669) 69W 104A 71c] ASIC:[ 85c (125c) 820hz(BL: 820) 4312 (E:193) F:0 L:0] LOOP[1] ON TO:0 (w:8409) 2: DC2DC/1/:[vlt1:662 vlt2:664(DCl:794 Tl:794 Ul:669) 70W 105A 79c] ASIC:[105c (125c) 810hz(BL: 810) 4239 (E:193) F:0 L:0] 3: DC2DC/1/:[vlt1:664 vlt2:666(DCl:794 Tl:794 Ul:669) 70W 106A 85c] ASIC:[115c (125c) 820hz(BL: 820) 4170 (E:193) F:0 L:0] LOOP[2] ON TO:0 (w:8567) 4: DC2DC/1/:[vlt1:662 vlt2:664(DCl:794 Tl:794 Ul:669) 71W 107A 54c] ASIC:[ 85c (125c) 840hz(BL: 840) 4359 (E:193) F:0 L:0] 5: DC2DC/1/:[vlt1:658 vlt2:664(DCl:794 Tl:794 Ul:669) 71W 107A 70c] ASIC:[ 85c (125c) 830hz(BL: 830) 4208 (E:193) F:0 L:0] LOOP[3] ON TO:0 (w:8581) 6: DC2DC/1/:[vlt1:654 vlt2:656(DCl:794 Tl:794 Ul:669) 72W 109A 75c] ASIC:[110c (125c) 850hz(BL: 850) 4347 (E:193) F:0 L:0] 7: DC2DC/1/:[vlt1:650 vlt2:656(DCl:794 Tl:794 Ul:669) 68W 105A 80c] ASIC:[105c (125c) 820hz(BL: 820) 4234 (E:193) F:0 L:0] Personally I think you are still too close to the 750W limit of your power supply with a total maximum of 720W across the 4 loops. That puts you at 96% of the power supply rating. I would step down another 15W per loop and give yourself some more margin on the power supply. Yes, you'll probably lose some hashrate in doing so, and get a bit more peace of mind. Just my $.02. |
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I have a question for Spondoolies. When I look at my ASIC Stats page, I see colored values for the "hz" value as part of the "ASIC[:[ 85c (125c)...... ]. If you look back a few posts, you'll see a sample page that illustrates what I am referring to. In the example above, it's a yellow "710hz" or "720hz". On my page, I have some yellow values, some blue values. I'd swear I have seen some white values.
My question is, what does the color mean? Obviously a programmer went to some lengths to do that, and it's just not obvious what the color means. I see nothing related to temperature, and I am way underclocked, and have a mix of blue and yellow values. In my case the blue values are always less then the yellow values, but that's about the only correlation I see. I didn't see anything in the recently released SP20 Users guide that made this clear.
What's going on here?
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Could you elaborate on the fan changes you have made to your SP20?
- Fan model? Is it a PWM fan or are you using any voltage control for speed?
- Airflow direction? (i.e. does it "suck" or "blow" across blades?)
Always interested in what folks do to quiet it down and preserve hashrate.
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You might want to adjust the title to indicate that these are SOLD.
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I'll take +1.01% to 1.25%
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How about an SP10. Whisper quiet at only 80db.
Joking.
Definitely SP20 or S5. I'd pick the S5 because although it is slightly slower it uses less than half the power of the SP20 meaning you can get more plugged in before blowing the electrics to bits.
While I can't comment on the SP10 sound, I think the SP20 and the S5 are quite similar in power consumption at the S5 rated speed of 1115 GH/s. The S5 doesn't have a decisive edge in terms of power in my opinion, unless you try and extract the last 100-200 GH/s out of the SP20. My little SP20 is chugging along at 920 GH/s, using about 430 watts (measured at the wall). My speed is currently set by what I am willing to spend on electricity, and endure in terms of noise. |
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I wonder how much the "centralization" of mining will actually change how things play out. When you think about it, many of the big farms cannot just hoard the Bitcoins they mine. They have salaries, rent, and electricity to pay. They somehow have to dispose of some, maybe a lot, of the Bitcoins they mine. Either they convert to fiat, which means somebody else then has the Bitcoins, or they directly pay their bills in Bitcoin. One way or another, the mined Bitcoins end up the hands of folks that aren't likely miners. Isn't that kinda the point of mining? While I as a miner would like that to be me, in the grand scheme of Bitcoin, does it really matter? I also see little evidence that how centralized the production (i.e. mining) of Bitcoins influences it's price. I expect that the long term value of Bitcoin will be determined by things that have nothing to do with it's production cost. While I have tended to hoard my few coins, it is just a pittance, I am hoping to get a better price. I expect that's true of many of the folks on these boards.
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i think i read something like this somewhere before.
2 IT admins started mining and because they were admins only they could see the data
i think they made like $12 before someone found out and they got sacked
i think it was a trainee admin
If they were overly good at their jobs they would have received a warning, good admins aren't easy to hire. Sometimes company executives feel it necessary to "make an example" of particular poor behavior. Being good at you job will usually help, but not always. |
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So I have right now running 2 SP20 running off a EVGA G2 1300w. Theyre showing "wall watts at about 620-640 watts" each. Is it too much? They hash at about 1170-1190Gh/s.
The "wall watt" figure on the "ASIC Status" screen is an estimate, which is calculated using what the mining hardware knows about it's internal consumption. My limited experience of 1 SP20 shows that figure to be higher than what I measure at the wall. I run an EVGA 1000W G2 which I think is more efficient than the calculation anticipates. I expect that your 620-640 would actually be under 600 at the wall if you measured it. I think you are fine. |
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If you are a seller: Right now may be a nice time to sell some of your used SP20's for a nice premium... Right before the next generation is released but after all the new units have been sold out by the manufacturer. if you are a buyer: wait until Gen3 gets released and then purchase SP20's at a discount from the big dogs unloading to purchase the best new hardware  Anyone in the SF Bay area want to buy a pair of SP20s? You should put this under the "Marketplace" section of the "Bitcoin Forum". You'll get some bites over there, or on Ebay. |
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Anybody know gauge the cables are for EVGA G2 power supplies? They are red, and sleeved, with nothing to indicate 18AGW or 16AWG. This seems to be a risk associated with use of the PCIe standard way beyond it's original intent.
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We came to a point where the most cost efficient miners are also incredibly power hungry. It's probably going to look worse for home miners in the future.
Fun ends when you have to hire an electrician to help power your new toy.
I so want miners = space heaters. It is a viable way to use them. 16 kwatt beasts will kill off bitcoin. 1.5 kwatt space heaters will not. Just an opinion not a fact. There's nothing that requires "home mining" for Bitcoin to be viable. I have serious doubts about the long term viability of Bitcoin, but those doubts have nothing to do with my ability to participate in the mining of those Bitcoins. I completely agree that "16 kwatt beasts" will kill off home mining. |
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I would suggest that you take your idea and scale back the number and speed of your miners by a factor of 5, or maybe 10. See if it still looks like a great idea then. The idea of included electricity isn't itself a crime, it's just that your intended use doesn't fit what they are renting you. It's unthinkable that they would lease you 160 square feet with several 15Amp circuits with which to run your miners. You could always tell them of your plans and see what they say.
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The following "requirements" don't require a new chip design:
"I was thinking 30 TH/s range with 16,000 watts and .51 watts per GH"
The above, except possibly for cost, can be done with roughly 30 SP20's. It can easily be donwclocked to make the .51 W/GH without trouble.
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While the BitFury Mining Center article is interesting, it is from August of 2014. It explicitly mentions CoinTerra as a competitor and it's planned Canada data center. Things can and do change a lot in the 6 months since that article was written (e.g. the exit of CoinTerra). I personally expect the next halving to be a fairly disruptive event.
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While they can be used for home mining, either of them is fairly loud when running at their normal rated speed. Be prepared to sacrifice some speed, and or tinker with the device if you want quiet.
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It's crazy to think that all 8 billion people are possible users of Bitcoin. Absent good Internet connectivity, electricity, and some kind of computing capability, you can't use Bitcoin. Also your prospective "trading partners" have to be in a similar situation, or else it doesn't fly. As a currency, Bitcoin has some MAJOR hurdles to overcome.
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Anyone know where I can get the screws for the outside of the sp20?
I'd like to secure them to my racks. And the holes are perfect for it.
You might try the primary Spondoolies thread for screw specifications and such: https://bitcointalk.org/index.php?topic=521520.0Armed with those, I would go to my local hardware store. You could even take the SP20 with you, though that's kinda "over the top" in terms of providing them the example you are trying to match. |
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In case it's not obvious to folks, it looks to me like Spondoolies has gone ahead and made firmware version 2.6.14 the "now most current" firmware for the SP20, without choosing it as a test version via a "Manual Update".
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It seems like you need more inflection, Phillip. Something like calling a horse race.
"It's armedmilitia by a half length rounding the second turn......"
I wish I could do it justice.
All in fun, in case that's not obvious!!!
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