Just ordered my Avalon A921

I just got myself an Avalon A921 from Blokforge. No customs hassle since they take care of it for me, and it set me back 396, paid with a credit card. I’ll set it up and share a review soon. It’s supposed to hit 20 TH at 1800 watts. Fingers crossed it can downclock to 18 TH and maybe run at 1500 or even 1400 watts. The A841 was decent for downclocking. But the A851? Not great at all. I’ll keep you updated.

When did you place your order?  I ordered 2 on Nov 30 and 2 on Dec 1 and no shipping notice yet. The sales price of $349 was hard to resist.

30 of nov but just one unit

A seller from Austria says this machine needs 95 - 100 Watt / TH. So this machine needs 1900 - 2000 Watt. I'm looking forward to your values. Is it possible to run the miner with two power supply´s?

Yes, as long as each group of five 6-pin PCIe power connectors (there are two groups; one on each side of the miner) is connected to only one PSU.

Yes  that is correct. I have a youtube video of the A851  with 2 psu's https://www.youtube.com/watch?v=aXZQmKtv2-E&t=3s

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.

Lucky. I somehow ordered one when they were first listed for $399 and price dropped $50 right after submitting. They credited back. No shipping notice yet though.

Likely duties/tariff is likely built into their pricing it just shipped from TX like they would be for our group buys from Portland.

it just arrived [along with 5 l3+ and 2 s9i all used from eBay] all need to get low power mods. I will get to the avalon late tonight. busy doing a build out in north jersey this week. Hoping to keep the avalon in house.

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...

So I am looking for the software link as the A921 will not work with a841 software. poking around here is a no go so far https://github.com/Canaan-Creative this seems good https://github.com/Canaan-Creative/avalon9-docs/wiki/AvalonMiner-921-firmware-downloads Version 20180918 Download link Firmware - 20180918 First controller's firmware for A921 https://canaan.io/downloads/software/avalon921/openwrt/20180918/ note rasp pi 3  is supported not rasp pi 3 + https://canaan.io/downloads/software/avalon921/openwrt/20180918/rpi3-modelb/

https://canaan.io/downloads/software/avalon921/ This help?

got it thanks doing original the sept 18th first. flashed with etcher and my mac mini new flash works and I will move to next step need a micro usb cord to the dongle

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.

have a issue could be usb cable which does both power and signal is defective I am dropping connection between auc and miner. this is an example psu issue  it is now using  a pair of bitmain apw3+ and works! trying down clock with this setting all other settings are stock downclock results with first rasp pi are poor   watts are about 2020 stock setting I got watts to drop to 1800  but  hash dropped more then it should of.  so say 2020 watts give 19th or 1800 watts give 17th basically shit gear on first attempt at down clocks. I moved onto newer firmware will get back with numbers stock was 2052 watts and 20 th on new rasp pi first down clock used --avalon9-voltage-level -1 watts dropped to 1932 will get back with a hash number 20.5 th so far so newer rasp pi seems better 1932/20500 = 94 watts a th  not close to a m10  2400/34000 = 70.5 watts a th but cheap 2 units = 790 plus psus say 1000 or 1100 for 40th an m10 from li is 890 plus tax and shipping or 1200 for 34th

My orders are still processing and past ship date. My first order was #6611. What were your guys order numbers? Curious if they are shipping by when the orders were placed or not. Hoping Canaan also offers some low power firmware.

I am behind you @ 6656. Started a chat yesterday and I was told a few more days to ship. It will not be here for Christmas, but I am hoping by New Years. Time will tell.

Edit 1783 watts  doing 18123 gh using this setting --avalon9-voltage-level -7 decent about 98 watts a th  but I am hoping for better at stock it was 2020 watts doing 20500 it is a lot of hash for under 400 ssd but you don't get good efficiency. this is an industrial miner needs 240 volts for 1 psu or 2 separate circuits for 2 psus if 120 volts it is loud. I am hoping for better firmware.  I will tweak it more , but I do not like  results so far. It is very close to the s9i in efficiency  but does more hash with more power. 13700 hash 1250 watts s9i on LPM I may be getting better numbers with the second rasp pi firmware I can drop watts from 2020 to 1731  with this setting

The --avalon9-voltage-level command-line option does not accept values of less than 0. In other words, your chosen value of -7 is an invalid value, and therefore may not be having any significant effect on your A921's efficiency. According to lines 1643 to 1645 of cgminer.c from the avalon9 branch of Canaan's cgminer repository, the range of integer values that is accepted by --avalon9-voltage-level is 0 to 15: I therefore suggest using --avalon9-voltage-level 0 and --avalon9-voltage-level-offset -2 simultaneously if you're looking to run your A921 at the lowest possible voltage level.