Avalon A7 announced

[HagssFIN]

Have 2 machines down right now with dead fans.  Anyone know where to get more fans?

Where are you located?

Here is a list of compatible cooling fans for the Avalon 7.

.. <snip>

If your miner is out of warranty, here is a list of few compatible replacement cooling fan models:

• Cooler Master A12038-60BB-4RP-F1
• Delta Electronics QFR1212GHE
• Delta Electronics QFR1212GHEXUM
• Nidec V12E12BS1B5-07
• Sanyo Denki 9GV1212P1J01
• Shengjiu SG121238BS
• Sunon PSD1212PMBXA-F-PWM

https://bitcointalk.org/index.php?topic=3224256.0

This one usually has good availability in electronics stores: Delta Electronics QFR1212GHE


Can you find any of these fans at your local market? Where are you located?

here is an European seller --> https://www.cryptouniverse.at/shop/delta-electronics-qfr1212ghe-190-210cfm-replacement-fan-for-asic-miners/

here is an US seller --> https://www.ebay.com/itm/6000RPM-Cooling-Fan-Replacement-4-pin-Connector-For-Antminer-Bitmain-S7-S9-Black/112634675926?hash=item1a398cc2d6:g:nIIAAOSwYVlaA7fm

[1714517042]

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[1714517042]

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[1714517042]

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[SilentMining]

...

Thanks!  I have had the hardest time trying to find the Cooler Master.  Ordered a few extras in case more crash.  Thanks for the help!


Moderator's note: This post was edited by frodocooper to trim the quote from HagssFIN.

[throwaway2]

has anyone attempted to run a 741 in a chain with a few 841s?

does the firmware make this impossible? I seemed to recall people mixing 6s/7s

thanks

[Steamtyme]

has anyone attempted to run a 741 in a chain with a few 841s?

does the firmware make this impossible? I seemed to recall people mixing 6s/7s

thanks

I haven't run this setup. Most people just go with a second Pi for the cost versus potential issues/ lost feature.

Here is a post that explains things pretty well.

[Foofighter]

has anyone attempted to run a 741 in a chain with a few 841s?

does the firmware make this impossible? I seemed to recall people mixing 6s/7s

thanks

That does not work at the moment, you can chain A821 with A841 but not A7 with A8 series.
br
Tom

[toptek]

has anyone attempted to run a 741 in a chain with a few 841s?

does the firmware make this impossible? I seemed to recall people mixing 6s/7s

thanks

I would use a second PI , i couldn't get my A6 or A7 to work to gather because of the cable form the miner to the AUC @ the miner end on the 741 the plug is bigger then the one for the A6 miner end if you can make a plug to either the A7 or A6 miner end form either miner that might work or try a USB HUB then plug that it into one PI with Custom software like Minera that might work . or edit one of the Avalon images to work with both a A6 and A7 and use a USB HUB that way but i that may not work well because of Avalon's software but should with minera or the black screen for CGminer running UBUNTU 16 .


I run my A6 and A 7 with Minera https://getminera.com/ but not on the same controller i use two PI's that are not RPI  and compile Ccminer 4.10 to run with both on two controllers , and haven't tired with a USB Powered HUB On the same controller .

[HagssFIN]

A6 and A7 data communication is not compatible with each other,
and I would definitely put those two generations with a own Raspberry Pi controller unit.

And I would also run A7 and A8 generation miners with a own Raspberry Pi controller unit per generation.

[throwaway2]

thank for the replies everyone, just gonna grab another pi3

[akadamson]

A6 and A7 data communication is not compatible with each other,
and I would definitely put those two generations with a own Raspberry Pi controller unit.

And I would also run A7 and A8 generation miners with a own Raspberry Pi controller unit per generation.

7 and 8 are not compat either.  A 7 on an 8 controller or vice versa does nothing to the opposite, miner won't even start.

[HagssFIN]

A6 and A7 data communication is not compatible with each other,
and I would definitely put those two generations with a own Raspberry Pi controller unit.

And I would also run A7 and A8 generation miners with a own Raspberry Pi controller unit per generation.

7 and 8 are not compat either.  A 7 on an 8 controller or vice versa does nothing to the opposite, miner won't even start.

True.

[NotFuzzyWarm]

Anyone know if the A7 supports 'More options' voltage control like the A8 does?
I want to use a 721 in my office and with just the offset option set to -2 is certainly quieter than other settings but still rather audible.

 I tried --avalon7-voltage-level -1 and miner did not start. I see -ck's cgminer read me only mentions support for Avalons 2 & 3 and wonder if Canaan extended the commands to A7.

[HagssFIN]

@NotFuzzyWarm

Here are the cgminer commands for the A7 series.

These are the rows 1421 -> 1481 in the cgminer code.

Code:

#ifdef USE_AVALON7
	OPT_WITH_CBARG("--avalon7-voltage",
		     set_avalon7_voltage, NULL, &opt_set_avalon7_voltage,
		     "Set Avalon7 default core voltage, in millivolts, step: 78"),
	OPT_WITH_CBARG("--avalon7-voltage-level",
		     set_avalon7_voltage_level, NULL, &opt_set_avalon7_voltage_level,
		     "Set Avalon7 default level of core voltage, range:[0, 15], step: 1"),
	OPT_WITH_CBARG("--avalon7-voltage-offset",
		     set_avalon7_voltage_offset, NULL, &opt_set_avalon7_voltage_offset,
		     "Set Avalon7 default offset of core voltage, range:[-2, 1], step: 1"),
	OPT_WITH_CBARG("--avalon7-freq",
		     set_avalon7_freq, NULL, &opt_set_avalon7_freq,
		     "Set Avalon7 default frequency, range:[24, 1404], step: 12, example: 500"),
	OPT_WITH_ARG("--avalon7-freq-sel",
		     set_int_0_to_5, opt_show_intval, &opt_avalon7_freq_sel,
		     "Set Avalon7 default frequency select, range:[0, 5], step: 1, example: 3"),
	OPT_WITH_CBARG("--avalon7-fan",
		     set_avalon7_fan, NULL, &opt_set_avalon7_fan,
		     "Set Avalon7 target fan speed, range:[0, 100], step: 1, example: 0-100"),
	OPT_WITH_ARG("--avalon7-temp",
		     set_int_0_to_100, opt_show_intval, &opt_avalon7_temp_target,
		     "Set Avalon7 target temperature, range:[0, 100]"),
	OPT_WITH_ARG("--avalon7-polling-delay",
		     set_int_1_to_65535, opt_show_intval, &opt_avalon7_polling_delay,
		     "Set Avalon7 polling delay value (ms)"),
	OPT_WITH_ARG("--avalon7-aucspeed",
		     opt_set_intval, opt_show_intval, &opt_avalon7_aucspeed,
		     "Set AUC3 IIC bus speed"),
	OPT_WITH_ARG("--avalon7-aucxdelay",
		     opt_set_intval, opt_show_intval, &opt_avalon7_aucxdelay,
		     "Set AUC3 IIC xfer read delay, 4800 ~= 1ms"),
	OPT_WITH_ARG("--avalon7-smart-speed",
		     opt_set_intval, opt_show_intval, &opt_avalon7_smart_speed,
		     "Set Avalon7 smart speed, range 0-1. 0 means Disable"),
	OPT_WITH_ARG("--avalon7-th-pass",
		     set_int_0_to_65535, opt_show_intval, &opt_avalon7_th_pass,
		     "Set A3212 th pass value"),
	OPT_WITH_ARG("--avalon7-th-fail",
		     set_int_0_to_65535, opt_show_intval, &opt_avalon7_th_fail,
		     "Set A3212 th fail value"),
	OPT_WITH_ARG("--avalon7-th-init",
		     set_int_0_to_65535, opt_show_intval, &opt_avalon7_th_init,
		     "Set A3212 th init value"),
	OPT_WITH_ARG("--avalon7-th-ms",
		     set_int_0_to_65535, opt_show_intval, &opt_avalon7_th_ms,
		     "Set A3212 th ms value"),
	OPT_WITH_ARG("--avalon7-th-timeout",
		     opt_set_uintval, opt_show_uintval, &opt_avalon7_th_timeout,
		     "Set A3212 th timeout value"),
	OPT_WITHOUT_ARG("--avalon7-iic-detect",
		     opt_set_bool, &opt_avalon7_iic_detect,
		     "Enable Avalon7 detect through iic controller"),
	OPT_WITH_ARG("--avalon7-nonce-mask",
		     set_int_24_to_32, opt_show_intval, &opt_avalon7_nonce_mask,
		     "Set A3212 nonce mask, range 24-32."),
	OPT_WITHOUT_ARG("--no-avalon7-asic-debug",
		     opt_set_invbool, &opt_avalon7_asic_debug,
		     "Disable A3212 debug."),
	OPT_WITHOUT_ARG("--avalon7-ssplus-enable",
		     opt_set_bool, &opt_avalon7_ssplus_enable,
		     "Enable avalon7 smart speed plus."),
#endif

The voltage level command has value range from 0 to 15.

[NotFuzzyWarm]

Ah ha! So the voltage value is not a step down from default like the A8 does but rather is being directly set by the command. No wonder the A721 dina like -1

Thanks, I'll try this tomorrow. I was running an uc/uv s7 in the office but since it provide ~3.5THs @ 930w and the A721 with -2 offset is doing 5.5THs @ 850W ya can see how it would be nice to go with the 721 if I can quiet it down a bit more.

[HagssFIN]

Yeah I think if you can get it running stable with fixed fan speed somewhere between 2500 to 3000 rpm, it should be a reasonable noise level machine.

[NotFuzzyWarm]

Ja. Right now in the 70-75F office the fan is running around 60-65% and still makes a soft howling. As it ramps up to temp the sound starts around 55% speed so just a little direct under-volting & low offset should work perfectly - and knock the socks off of the 2 remaining uv/uc s7's I still have. It is already beating them for THs/Watts, just not anywhere near as quiet.

That just leave me where to put my other winter space heater - a R4 batch-6 that works perfect... Hate to just shut it off for the summer and lose the 8-9THs but starting to get too warm in my office...

[NotFuzzyWarm]

Got the 721 to be office friendly.
Using  --avalon7-voltage-level 12  and voltage offset of -2 after 1 hour it reports a hair over 5THs, temp of 88-89C and fan is at 3450RPM / 53%. Still audible but actually quieter than my dual-conversion UPS's. Haven't yet measured actual power draw but I'm guessing it is around 600w or less as the APW3++ PSU is at same temp as the room even running off of 120v.

Faboo! I have 2 more 721's and those will now go into our inspection room to replace the other uv/uc s7 I have running there. Being able to bring the other 721's back online certainly makes me feel better about turning off the R4 during summer

[lok8nusa]

Got the 721 to be office friendly.
~

I've been following this with keen interest. My 741's operate in an 'unfriendly' (warm) environment. This little tweak makes a huge difference for 'em.

Edit: I had already been running with -2 voltage offset.

Thanks to HagssFIN, and NotFuzzyWarm (who knew the question to ask   ).

[NotFuzzyWarm]

Yer quite welcome  
Hadn't thought about my 6x 741's up in the room with my main farm but now that you mention it think I'll drop their voltage as well. Gets to 85-90F up there on hot days. Like you I have been using just the -2 offset with them so anything that can drop their power/temps a bit more is good.

edit: and Merit to you for reminding me to apply this to my 741'S

[goose1072]

Can you go lower than -2 on a 741?

[HagssFIN]

No.

You can see the value range in the code which I posted in the previous page.