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Heh heh, gee, color me not surprised.....
At best these folks were highly over-optimistic hucksters from day-1 shilling 7nm tech long long before it was anywhere close to being usable other than as engineering test samples. As a result all performance specs they came up with were pure speculation with zero basis in reality. At worst they were scammers who from the very beginning knew exactly how this would turn out.
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this firmware is a mess
can not do a lot of stuff with it
Perhaps, but unlike BM at least Canaan lets us play with it to see what happens  |
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Well, along with voltages you can always try playing with the Frequency and/or turn off Smartspeed (Canaan's constant Autouning?) as well. Ref the available commands for More Options that look appropriate. Snippet of them from Canaan's A921 Github that Frodo found for us: #ifdef USE_AVALON9
OPT_WITH_CBARG("--avalon9-voltage-level",
set_avalon9_voltage_level, NULL, &opt_set_avalon9_voltage_level,
"Set Avalon9 default level of core voltage,range:[-15 to 15], step: 1"),
OPT_WITH_CBARG("--avalon9-voltage-level-offset",
set_avalon9_voltage_level_offset, NULL, &opt_set_avalon9_voltage_level_offset,
"Set Avalon9 default offset of core voltage level, range:[-2, 1], step: 1"),
OPT_WITH_CBARG("--avalon9-freq",
set_avalon9_freq, NULL, &opt_set_avalon9_freq,
"Set Avalon9 default frequency, range:[25, 1200], step: 25, example: 800"),
OPT_WITH_ARG("--avalon9-freq-sel",
set_int_0_to_7, opt_show_intval, &opt_avalon9_freq_sel,
"Set Avalon9 default frequency select, range:[0, 7], step: 1, example: 7"),
OPT_WITH_CBARG("--avalon9-fan",
set_avalon9_fan, NULL, &opt_set_avalon9_fan,
"Set Avalon9 target fan speed, range:[0, 100], step: 1, example: 0-100"),
OPT_WITH_ARG("--avalon9-temp",
set_int_0_to_100, opt_show_intval, &opt_avalon9_temp_target,
"Set Avalon9 target temperature, range:[0, 100]"),
[...]
OPT_WITH_ARG("--avalon9-smart-speed",
opt_set_intval, opt_show_intval, &opt_avalon9_smart_speed,
"Set Avalon9 smart speed, range 0-1. 0 means Disable"),
In all cases, 'step' means increments of. eg for Freq. it shows 'step: 25' meaning 575, 600, 625, 650, etc. Interesting thing is the built-in SmartSpeed tuning does not seem to follow that and as you've seen produces values not divisible by 25... Also wonder what --avalon9-freq-sel <0-7> does? Pre-defined freq /performance settings? So far that 20+THs @ 1,871w looks rather good and better than the A841 using -1 Voltage level (13.5+THs @ 1,300w) edit: Corrected range for --avalon9-voltage-level to read as -15 to 15 per Frodo's findings.  |
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You can look at the CGMiner API Log to record exactly what those voltage and voltage offset changes do. Near the top the line for Vi tells you actual PSU voltage at the PCIe connectors and Vo is the core voltage regulator outputs for each board. Vo will change with changes you make in voltage level and voltage offset. Give things a 10-15min and you also see the miner freq it ends up running at. eg, my oldest one running stock gives Temp[39]
TMax[95]
Fan[5910]
FanR[72%]
Vi[1195 1195 1188 1188]
Vo[4068 4100 4129 4118]
GHSmm[21468.46]
WU[289826.24]
Freq[806.36]
PG[15]
As you change Vo you will see that Freq also changes as the miner automajikly plays with it to produce best speed results for those voltage settings. |
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For fans, in More Options you can use --avalon9-fan <min-max> to set both the minimum and maximum speeds eg. --avalon9-fan 50-75 sets min speed to 50% and max to 75%. That of course also applies to the A7xx and A8xx miners as well.
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And like the 721/841's can also set max freq and fan speed as well. Frankly, I never toyed with the settings when I got my first 2 back in Oct. Just plugged them in and let'em run.
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Do be sure that the cable is for both power and data... Very common issue is no coms because of folks using a charging cable that uses all 4 wires for power...
How common is that? Common enough that Blokforge now supplies the USB cable when you buy a AUC3 dongle.
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w00t! Last night got notice from Blokforge my 3x A921's have shipped and should be here by end of week. Now to decide which dying s9's to replace with the 921's...  |
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Still no word on when my 3 ordered Nov 30 will ship but I assume will be today or tomorrow. The two I got back in Oct. (at full price) are running perfectly at a rock solid 21.5-22THs each with 2x APW PSU's feeding each of them.
Don't know if anything has changed but Kano tried tweaking the one Canaan send him back in Sept and found that even using SSH to get in it pretty much ignored his attempts to change speed and other settings.
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..and why it is only 3.5 times higher and not 6 times higher? Um, because the pool payout hash rate is still ramping down after that big miner left... 5n PPLNS remember? |
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[...] Personally I have yet to figure out how it does this though as pool doesn't report anything unusual...
The dev fee is generated by the miner actually mining to 2 different pools at the same time, 1 pool is the one(s) you setup and the other is the one the Dev hard-coded. Stratum has a function that allows this and the user never sees the hidden mining going on - no way to verify just what % is being diverted from their chosen pools. |
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At 40nm node size? Big whoop. Hopelessly outdated and useless except as a training exercise. More to the point is that the driver is tied directly to the specific chip used. Ya can't just plug in a different chip and think it will work.
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When something claims '220v input' it is implied that the standard range of 200-250v is acceptable. If not then the rating should read '220v MUST be used' with strong emphasis on that. That said, being Bitmain it still is a reasonable question to directly ask them.
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Personally I would have turned on a couple machines set them up and just carried on down the line doing that.
But that means them having to think and know about what they are doing and that is just sooooo hard for some folks...   |
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If really concerned about where the miners are initially pointed then here's an easy startup for mass miners: When starting up a new rack/pod of miners - block internet access to them until configured. Is that really so hard? Nope.
Thing is, once again it is the 'Evil' Bitmain that has been singled out. Um, controller software for the Avalons is pre-configured as well and point to Canaan's account with Kano. In 2014 my AMT miner came pre-configured pointing at Eligius. Odds are all miners arrive already pointing at the mfgr addresses/pools...
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Interesting they do not say what chips are in it, just that there are 252 of them. My guess: They are the s9's 16nm chips running in a low power mode. Throw in the built in PSU and I suspect that like the Whatsminer's they are pushing max efficiency by using more chips per-string and feeding in higher voltage straight from the PSU with no intermediate regulator.
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You want a quiet miner with decent speed, think used Avalon A71's. When undervolted/under clocked using --avalon7-voltage-level 9 --avalon7-freq 525 --avalon7-fan 10-30 they make perfect home & office heater pulling around 750w from the wall. Most of the time the PSU is louder and speed is still over 5THs. Find a super quiet ATX PSU and could even be used in the bedroom.
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Personally I use Stayonline.com for all my AC power cables. Made in USA, fully UL/CSA registered and any plug/socket combination you could ever want.
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