New one fan S7

[Legacy2005]

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]

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.

[leowonderful]

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.

[talks_cheep]

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.

[sidehack]

Who woulda thought, two years ago, that we'd be considering Avalon a less evil option than Bitmain?

[KeezAZA]

Would a S1 fan add any value to the cooling process?

[adaseb]

Would a S1 fan add any value to the cooling process?

No, but an S4/S5 would.

[generalt]

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.

[mtmining2]

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.

[philipma1957]

 
@ 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

[mtmining2]

@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...

[KeezAZA]

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.

[Sierra8561]

@ 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?

[philipma1957]

@ 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

[leowonderful]

@ 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.

[philipma1957]

@ 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.

[Biodom]

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?

[sidehack]

Probably about like a couple SP10.

[Legacy2005]

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)

[philipma1957]

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.