Legacy2005
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April 04, 2016, 05:16:46 PM |
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my question is. why the 1 fan all of a sudden.
If the machine could run well on 1 fan why have 15 batches before with 2 fans.
Is this in preparation for a new unit to field test with 1 fan. will be interesting to see how these function in a home miner environment where heat can be an issue at times.
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Herv12
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April 04, 2016, 07:39:18 PM |
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my question is. why the 1 fan all of a sudden.
If the machine could run well on 1 fan why have 15 batches before with 2 fans.
Is this in preparation for a new unit to field test with 1 fan. will be interesting to see how these function in a home miner environment where heat can be an issue at times.
Logically, remove a fan means that the other will run faster to compensate, which will make more noise. (Knowing that, saw the actual acoustic level of the S7 with 2 fans, this increase a little more did not matter much ) The second problem more hassle is that it will limit the maximum room temperature. In the summer it may be more complicated. Those which connect the ventilation ducts... to miner will also have more difficulty because the pressure capacity is divided by 2.
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leowonderful
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Bitcoin FTW!
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April 04, 2016, 07:44:21 PM |
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my question is. why the 1 fan all of a sudden.
If the machine could run well on 1 fan why have 15 batches before with 2 fans.
Is this in preparation for a new unit to field test with 1 fan. will be interesting to see how these function in a home miner environment where heat can be an issue at times.
Bitmain wanted to reduce the price as much as possible, so they made a batch with as few parts as possible that could still operate. Buncha chinese cheapos, but the good news is it runs at a higher decibel level but at nearly the same temps. In summer temps may become a problem but it works for now.
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talks_cheep
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April 04, 2016, 10:43:30 PM |
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I have a few I'll give away if anyone wants one. Talks_Cheep?
I know you think you're being funny, but I'm done/finished giving my good money to shady/sleezy Chinese Bitmain Tech m0therf@ckers. They takes your money, f@cks in your a$$, and you say "Thank you." Y'all are Disgusting.
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sidehack
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April 04, 2016, 10:44:43 PM |
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Who woulda thought, two years ago, that we'd be considering Avalon a less evil option than Bitmain?
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KeezAZA
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https://eloncity.io
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April 05, 2016, 08:48:08 AM |
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Would a S1 fan add any value to the cooling process?
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adaseb
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April 05, 2016, 10:45:28 AM |
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Would a S1 fan add any value to the cooling process?
No, but an S4/S5 would.
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generalt
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April 05, 2016, 12:01:40 PM |
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It doesn't look like it has the screw holes to mount a second fan on the rear. I guess it doesn't have to be mounted or you could just tape it or zip tie it there.
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BTC: 1GENERALrtBAjEv2Ps5cmEW1FADnXh1bCZ
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mtmining2
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April 05, 2016, 12:52:52 PM |
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Just got my shipment notification so I will let you all know how it is. Should be here Thursday or Friday. It will be running in my garage here in North Carolina so it should be a decent stress test.
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philipma1957
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April 05, 2016, 12:54:21 PM |
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@ mtmining2
try fan speeds 65 to 70% was top speed on batch 1 to batch 15
so
clock the gear to freq 500 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100 clock the gear to freq 525 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100
see how high you can go with freq and keep temps under 65 c see what you need to get fan to do 5500 rpm as this new delta rates 6000 rpm
buying this to think you will certainly do freq 700 is foolish
adding a second fan looks like a project but possible.
@ generalt finally tested the 2 gpus will send a pm
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mtmining2
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April 05, 2016, 01:07:41 PM |
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@philipma1957 That's the plan. Will start it out at ~500 and whatever % ends up being top speed for the fan and then work the freq up from there. I have pretty decent ventilation in the garage so it doesn't get too hot but we will see. Also may have to wait a bit for a real "stress test" as the temps here aren't supposed to be over 60 F for the next week or so.
Now, if it won't do 700 then I may rig another fan to it... I have a few spares now so what the heck...
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KeezAZA
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April 05, 2016, 01:12:40 PM |
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hmm.. my S5 is still kicking. S1 died so was thing of using that that fan. I shall wait and see how this S7-F1 performs in ZA temps.
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Sierra8561
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April 06, 2016, 05:35:18 AM |
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@ mtmining2
try fan speeds 65 to 70% was top speed on batch 1 to batch 15
so
clock the gear to freq 500 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100 clock the gear to freq 525 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100
see how high you can go with freq and keep temps under 65 c see what you need to get fan to do 5500 rpm as this new delta rates 6000 rpm
buying this to think you will certainly do freq 700 is foolish
adding a second fan looks like a project but possible.
@ generalt finally tested the 2 gpus will send a pm
Won't you lose significant hashing power by dropping the frequency to 500. Thus reducing bitcoin profit?
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philipma1957
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April 06, 2016, 05:41:58 AM |
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@ mtmining2
try fan speeds 65 to 70% was top speed on batch 1 to batch 15
so
clock the gear to freq 500 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100 clock the gear to freq 525 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100
see how high you can go with freq and keep temps under 65 c see what you need to get fan to do 5500 rpm as this new delta rates 6000 rpm
buying this to think you will certainly do freq 700 is foolish
adding a second fan looks like a project but possible.
@ generalt finally tested the 2 gpus will send a pm
Won't you lose significant hashing power by dropping the frequency to 500. Thus reducing bitcoin profit? Yes but finding safe numbers to not burn the miner is more important
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leowonderful
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Bitcoin FTW!
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April 06, 2016, 10:44:17 AM |
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@ mtmining2
try fan speeds 65 to 70% was top speed on batch 1 to batch 15
so
clock the gear to freq 500 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100 clock the gear to freq 525 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100
see how high you can go with freq and keep temps under 65 c see what you need to get fan to do 5500 rpm as this new delta rates 6000 rpm
buying this to think you will certainly do freq 700 is foolish
adding a second fan looks like a project but possible.
@ generalt finally tested the 2 gpus will send a pm
Won't you lose significant hashing power by dropping the frequency to 500. Thus reducing bitcoin profit? Yes but finding safe numbers to not burn the miner is more important Just buy a 120mm Noctua fan and put it on the miner. Save a lot of time and you won't have to deal with the freq and such. Or buy a cheap 120mm industrial pwm if you don't care about noise. I dunno if there's a place for a fan on this miner, but I doubt Bitmain would make a new chassis just for these batches.
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philipma1957
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'The right to privacy matters'
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April 06, 2016, 11:00:20 AM |
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@ mtmining2
try fan speeds 65 to 70% was top speed on batch 1 to batch 15
so
clock the gear to freq 500 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100 clock the gear to freq 525 fans to 70% check temps under 65 c fan rpms about 5500 and errors less then 0.0100
see how high you can go with freq and keep temps under 65 c see what you need to get fan to do 5500 rpm as this new delta rates 6000 rpm
buying this to think you will certainly do freq 700 is foolish
adding a second fan looks like a project but possible.
@ generalt finally tested the 2 gpus will send a pm
Won't you lose significant hashing power by dropping the frequency to 500. Thus reducing bitcoin profit? Yes but finding safe numbers to not burn the miner is more important Just buy a 120mm Noctua fan and put it on the miner. Save a lot of time and you won't have to deal with the freq and such. Or buy a cheap 120mm industrial pwm if you don't care about noise.I dunno if there's a place for a fan on this miner, but I doubt Bitmain would make a new chassis just for these batches.wrong no place to screw it in = fact you will need to figure a way out on how to attach it.
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Biodom
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April 06, 2016, 03:17:16 PM |
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Avalon6 does well with 1 fan, but it's also about 30% less heat. The S7 (current design) has quite a bit more solidity of the airflow path, which means constriction, which means more pressure needed to move enough air through to adequately pull heat away. If they've worked it out to where one fan can do it without bursting into flames, that's great. But what's the practical upperbound for intake air temperature?
yeah, the summer is coming fast... this fan is supposed to be 6000rpm vs 4500 for the two fan ones. 4500 rpm (two fans) were producing incredible noise at >=72dB. I wonder how 6k rpm fan sounds like?
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sidehack
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April 06, 2016, 03:25:08 PM |
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Probably about like a couple SP10.
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Legacy2005
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April 06, 2016, 03:29:05 PM |
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by removing plaque which replaces the fan. the holes may be below. Let 's hope it is the same case.
looks like they just replaced the back plate of the unit which had the screw mounts for the fan with the new grating as it is using the same mounting holes as the previous backing plate (right in the corners)
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philipma1957
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April 06, 2016, 05:17:12 PM |
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by removing plaque which replaces the fan. the holes may be below. Let 's hope it is the same case.
looks like they just replaced the back plate of the unit which had the screw mounts for the fan with the new grating as it is using the same mounting holes as the previous backing plate (right in the corners) Then adding the Sanyo ace that I supplied for the last avalon6 group buy should fix the issue.
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