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Topic: Avalon ASIC users thread - page 156. (Read 438600 times)

sr. member
Activity: 388
Merit: 250
June 25, 2013, 03:23:29 PM
you have to take care
you don`t know if the 20a converter is up for the job
max cip current is 2A
legendary
Activity: 1792
Merit: 1047
June 25, 2013, 03:18:22 PM
I decided to remove the PSU from inside the case. The airflow improved resulting in lower temperature.  Wink

letting hot air out with decreased air presure may turn out to be better.

I am considering on getting the Corsair AX1200i in an attempt to push the system into the 400s.

Because of its size I will have to keep it outside the case.
full member
Activity: 133
Merit: 101
Res Et Non Verbum
June 25, 2013, 03:16:00 PM
I decided to remove the PSU from inside the case. The airflow improved resulting in lower temperature.  Wink

letting hot air out with decreased air presure may turn out to be better.
legendary
Activity: 1792
Merit: 1047
June 25, 2013, 03:09:36 PM
The overclocking blew out my power supply.  My "silver" unit had an Antec Green 650W power supply.  I ran to the store and they had a Corsair 800W and I got it working again.

was it easy enough to upgrade the PSU? I have 3 corsair 860w platinum arriving later this week

It is easy Smiley Just remember to slide cut out cardboard to hold the screws in place. You can see photos of me using this on my power supply swap out that I had posted.

Here is a before and after upgrade to a Corsair AX860i from the original Batch 1 Avalon power supply.

https://bitcointalksearch.org/topic/m.1910169

Side by Side Comparison
Typical Batch 1 Avalon  before  upgrade, and an upgraded Batch 1 Avalon


Before                                             After
sr. member
Activity: 388
Merit: 250
June 25, 2013, 03:07:56 PM
the Antec Green 650W is ok until ~700w
if you go over 325 you will take it over the limit
it has over protection it should have shut down
I think it is still working.
with just 2 modules at 360 it takes it at about 70% of full load  

http://www.kitguru.net/components/power-supplies/zardon/antec-earthwatts-ea-650w-review-green-2011/4/
legendary
Activity: 1036
Merit: 1000
Nighty Night Don't Let The Trolls Bite Nom Nom Nom
June 25, 2013, 03:01:27 PM
The overclocking blew out my power supply.  My "silver" unit had an Antec Green 650W power supply.  I ran to the store and they had a Corsair 800W and I got it working again.

was it easy enough to upgrade the PSU? I have 3 corsair 860w platinum arriving later this week
hero member
Activity: 817
Merit: 1000
Truth is a consensus among neurons www.synereo.com
June 25, 2013, 01:55:08 PM
How high did you go?
legendary
Activity: 1610
Merit: 1000
June 25, 2013, 01:54:58 PM
The overclocking blew out my power supply.  My "silver" unit had an Antec Green 650W power supply.  I ran to the store and they had a Corsair 800W and I got it working again.
It was expected dude
legendary
Activity: 1064
Merit: 1000
June 25, 2013, 01:38:07 PM
remeber the talk about fans and cooling:

adding a fans and drilling a holes is completely different thing. So leting hot air out with decreased air presure may turn out to be better

front fans press "cool air" inside the PSU. drill holes will reduce the amount of cool air. so the PSU will die faster.

the air blow to PSU didn't go through module heatsink, so they are maintain cool.

drill holes about the PSU will let those valuable cool air run over...

PS: when temp3 is about 50 C, the chip die is only about 65C, completely no problem. not necessary to do too hard, we already over-engineered it for you.
fhh
legendary
Activity: 1206
Merit: 1000
June 25, 2013, 12:18:10 PM
@elasticband

the 760i is having an USB connector (or similar)  to report fan speed and efficency to the computer
I don't think you can use this feature on the avalon;)

and still I think the 860 would be better
but it's your decision
legendary
Activity: 1610
Merit: 1000
June 25, 2013, 12:17:37 PM


That was i was missing. You suggest exhaust fan to lower the pressure right? What about pressure itself does it correlate to cooling? I mean higher pressure=better cooling?

If that is the case i will just switch blue fan of. I have noticed that intake temp raised "suddenly" with 3 degrees which is false of course i am measuring constantly with other tools:) Which proves the fact that a hot air hits tem sensor just below blue fan. In other words when pwm fans are operating in max it is completely useless. Is that true

PS: buy the way restarts may come from your script how often do you run it? Do you lose network connectivity. And finally i think cgminer needs at least 2 mins to consider pool is dead. So if your primary pool dies restart (cgminer monitor may restart it).


Pressure is decided by the fan speed, while the air flow affect the cooling effect

For example, you block all the exists, then there will be maximum pressue in the case but worst cooling effect. Cooling effect is decided by how quick you can move the air through the case. On a radiator, a push and draw configuration always works better than single fan configuration

My script always check every 3 minutes, but when I was running 0225 firmware and 300Mhz, machine can be up and running for more than 1 month and cgminer restarts every 1-5 days. So I'm not sure it is a firmware issue or a clock rate issue
Thank you for the update:-)
About restarts - pls try to figure out if they are related to poll issues

About fans I am planning to remove blue fan. Fill the fan hole to avoid air out and install two additional fans to suck hot air out. What do you think about it?
legendary
Activity: 1988
Merit: 1012
Beyond Imagination
June 25, 2013, 12:06:26 PM


That was i was missing. You suggest exhaust fan to lower the pressure right? What about pressure itself does it correlate to cooling? I mean higher pressure=better cooling?

If that is the case i will just switch blue fan of. I have noticed that intake temp raised "suddenly" with 3 degrees which is false of course i am measuring constantly with other tools:) Which proves the fact that a hot air hits tem sensor just below blue fan. In other words when pwm fans are operating in max it is completely useless. Is that true

PS: buy the way restarts may come from your script how often do you run it? Do you lose network connectivity. And finally i think cgminer needs at least 2 mins to consider pool is dead. So if your primary pool dies restart (cgminer monitor may restart it).


Pressure is decided by the fan speed, while the air flow affect the cooling effect

For example, you block all the exists, then there will be maximum pressue in the case but worst cooling effect. Cooling effect is decided by how quick you can move the air through the case. On a radiator, a push and draw configuration always works better than single fan configuration

My script always check every 3 minutes, but when I was running 0225 firmware and 300Mhz, machine can be up and running for more than 1 month and cgminer restarts every 1-5 days. So I'm not sure it is a firmware issue or a clock rate issue
legendary
Activity: 1036
Merit: 1000
Nighty Night Don't Let The Trolls Bite Nom Nom Nom
June 25, 2013, 11:33:28 AM
can anyone recommend a fan to replace the blue fan on batch 1?
fhh
legendary
Activity: 1206
Merit: 1000
sr. member
Activity: 397
Merit: 500
June 25, 2013, 11:26:21 AM
Hi.

I've uploaded a new firmware with the about-to-be-released cgminer 3.3.1 with 2 new features which I hope you'll like:

http://ck.kolivas.org/apps/cgminer/avalon/20130626/openwrt-ar71xx-generic-tl-wr703n-v1-squashfs-factory.bin

--avalon-auto       Adjust avalon overclock frequency dynamically for best hashrate
--avalon-cutoff Set avalon overheat cut off temperature (default: 60)

this is in addition to the existing options:

--avalon-options Set avalon options baud:miners:asic:timeout:freq
--avalon-temp Set avalon target temperature (default: 50)

My 2 avalons sitting at 355/352. Temps 35/41 and 35/39
--avalon-temp 40

With strombom firmware they run @365 86.9 GH after 20h

   [timeout] => 33
   [frequency] => 354

I think the timeout is to low. With 365 i had to change timeout to 36 to avoid restarts.
sr. member
Activity: 397
Merit: 500
June 25, 2013, 11:23:53 AM
Hi.

I've uploaded a new firmware with the about-to-be-released cgminer 3.3.1 with 2 new features which I hope you'll like:

http://ck.kolivas.org/apps/cgminer/avalon/20130626/openwrt-ar71xx-generic-tl-wr703n-v1-squashfs-factory.bin

--avalon-auto       Adjust avalon overclock frequency dynamically for best hashrate
--avalon-cutoff Set avalon overheat cut off temperature (default: 60)

this is in addition to the existing options:

--avalon-options Set avalon options baud:miners:asic:timeout:freq
--avalon-temp Set avalon target temperature (default: 50)



My 2 avalons sitting at 355/352. Temps 35/41 and 35/39
--avalon-temp 40

With strombom firmware they run @365 86.9 GH after 20h

legendary
Activity: 1036
Merit: 1000
Nighty Night Don't Let The Trolls Bite Nom Nom Nom
June 25, 2013, 11:05:48 AM

Hi.

I've uploaded a new firmware with the about-to-be-released cgminer 3.3.1 with 2 new features which I hope you'll like:

http://ck.kolivas.org/apps/cgminer/avalon/20130626/openwrt-ar71xx-generic-tl-wr703n-v1-squashfs-factory.bin

--avalon-auto       Adjust avalon overclock frequency dynamically for best hashrate
--avalon-cutoff Set avalon overheat cut off temperature (default: 60)

this is in addition to the existing options:

--avalon-options Set avalon options baud:miners:asic:timeout:freq
--avalon-temp Set avalon target temperature (default: 50)





my batch 2 did not enjoy any of that a constant rate of 129mh/s..... all discarded.
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