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Author Topic: Avalon ASIC users thread  (Read 432427 times)
Icoin
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February 12, 2013, 01:32:25 PM
 #261

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Thanks - yep - sounds good to me.
Yes I do understand that even at 70C the chips may not be shortening their lifetime, but I was just getting the impression that it wasn't the chips or somehow they weren't even 50C.
Hopefully that clears it up for anyone else other than me too Smiley

The problem with 50°C is not related to the ASICs. I guess they gonna work correctly even with 70°C.
But 50°C enviromental temperature and the efficiency of the PSU is where im pointing at. More heat on the cables means more losses.

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February 12, 2013, 02:53:16 PM
 #262

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Thanks - yep - sounds good to me.
Yes I do understand that even at 70C the chips may not be shortening their lifetime, but I was just getting the impression that it wasn't the chips or somehow they weren't even 50C.
Hopefully that clears it up for anyone else other than me too Smiley

The problem with 50°C is not related to the ASICs. I guess they gonna work correctly even with 70°C.
But 50°C enviromental temperature and the efficiency of the PSU is where im pointing at. More heat on the cables means more losses.
Hasn't this being addressed already? 50°C is the temperature of the heatsinks, not the air going into the PSU which is obviously somewhere between ambient and 50°C. PSUs are designed to work in a computer case which routinely reaches 30-40°C so it should not be a reliability problem.

You might be right about efficiency though but it's difficult to know how much losses there are unless someone mods an Avalon to bring cool air directly to the PSU. The losses probably aren't big enough to matter: there's ~33% of power lost in the system bringing power to the chip and controlling them: even if you are 10% more efficient doing so (generous estimation), that's less than a 4% overall gain, when it will start to matter it will be time to buy the next generation of ASICs...

Could anyone come up with an explanation for the lack of Avalons reaching consumers although I could make a package come from Beijing February the 7th?

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February 12, 2013, 02:54:06 PM
 #263

[...] More heat on the cables means more losses.
While in theory you are correct (resistivity of metals raises with aprox. 4% per each 10C), in practice, because the power loss in cables is very low compared with other losses, the effect can be neglected.
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February 12, 2013, 09:31:51 PM
 #264

So Jeff, out of curiosity, just how many BTC have you collected so far since having this beast?

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February 12, 2013, 09:43:07 PM
 #265

800gh?!?!? Holy Retired Pope! Is this the Friedcat / D3 project or some unknown entity???

No clue, but I just ran the numbers with BFL-like power efficiency and these guys are banking 99,000 a month.  Shocked Shocked Shocked

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February 13, 2013, 12:34:33 AM
 #266

Then why posting this here?


Avalon users thread?


Because the Avalon works best with BTCGuild?

And its highly likely this is one user who just switched on their Avalon ASICS?

Because this user is now up to 940 GH/s? Which is 14 avalon machines.

The real question is why does it bother you so much?

LOL so you're speaking on Jeffs behalf. He cowardly denied such implication.

Its a rhetorical question, btw.
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February 13, 2013, 12:36:12 AM
 #267

LOL so you're speaking on Jeffs behalf. He cowardly denied such implication.

Its a rhetorical question, btw.


Jeff isn't in a position to say what he's actually thinking Wink
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February 16, 2013, 04:34:53 AM
 #268

I love there still aren't any avalon users in this thread... =P

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February 16, 2013, 04:56:24 AM
 #269

I love there still aren't any avalon users in this thread... =P

Well there is one don't know if I have ever seen the foundation post them being in possession of the only other machine that seems to have made it into the wild in all these weeks...
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February 16, 2013, 06:27:52 AM
 #270

Won't be long until it's a month since they shipped!  Someone start a countdown!

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February 16, 2013, 10:12:03 AM
 #271

Won't be long until it's a month since they shipped!  Someone start a countdown!

Oh,don't be BFL'ish  Cheesy

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February 17, 2013, 11:05:32 PM
 #272

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.


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February 17, 2013, 11:12:32 PM
 #273

Hi Jeff! Thanks for the update, please keep us posted on how the new firmware works out Smiley

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.


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February 17, 2013, 11:17:33 PM
 #274

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image...
Is Avalon not using opkg and a jffs2-capable firmware? O.o

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February 17, 2013, 11:33:29 PM
 #275

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.



I'm assuming that one can manually alter the fan profile in cgminer's config file. Have you tried this already?

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February 18, 2013, 12:34:49 AM
 #276

I'm assuming that one can manually alter the fan profile in cgminer's config file. Have you tried this already?

That wouldn't be an accurate test of the new firmware, if the settings were altered before giving the defaults a good chance to succeed/fail.


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February 18, 2013, 01:04:58 AM
 #277

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.



Thanks for the update!

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February 18, 2013, 01:24:00 AM
 #278

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.


How loud exactly is the unit. Can you compare it to the sound an Xbox360 makes? Or a range hood?
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February 18, 2013, 02:04:05 AM
 #279

New firmware received from Avalon via email.

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image appears to be based on cgminer 2.10.5, and the fans are running at a much higher speed (and noise level) than the previous image.  Restarted and was back to mining within minutes... let's see how this impacts stability.


How loud exactly is the unit. Can you compare it to the sound an Xbox360 makes? Or a range hood?

Or, more to the point, an overclocked 6990/7990?

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February 18, 2013, 02:14:42 AM
 #280

Upgrade was successful using standard web-based OpenWRT firmware upgrade procedure.

New image...
Is Avalon not using opkg and a jffs2-capable firmware? O.o

Does it matter? It's easier to guarantee a complete update if you just image the whole flash; the unit should then exactly match fresh production units.
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