New one fan S7

[JaredKaragen]

I was wondering others' thoughts on this new model.  At the ever dropping but currently 1.386BTC cost... its a tempting purchase.

I understand they are trying to cut costs... but...

I think the single fan is a bad idea.   I rely on the fans on either side to attach ducting and for it to handle the fact I have ducting to and from the miner on both ends.

I think the open outlet is going to be creating an issue for people without passive cooling in the room/space.   Presently my 5X7 room I have my S7's in do not get above 78*f on hot days with the miners closed in there..    Having to manufacture a new outlet housing or gut an old fan body to make an appropriate ducting attachment.... is going to be annoying.

Any opinions on running the fan solely as a puller fan, and not a pusher (oriented to the miner)?   This would 1/2 solve my issues;  because its easier to manage the heat through the exhausting;  not as much as it is to duct cold air into the fronts.

[sidehack]

One of my hosted S7 had a shot fan and one down board. It still ran hot with only two boards powered. I wouldn't run a one-fan S7 on stock clock south of the Arctic Circle.

[generalt]

I was temped to order another S7 but with only one fan now I don't think I want to take the risk.  I wished they would elaborate on why they decided to go with one fan only.

[notlist3d]

I was temped to order another S7 but with only one fan now I don't think I want to take the risk.  I wished they would elaborate on why they decided to go with one fan only.

I would guess was to lower production cost.  If they make thousands of miners and cut fan cost on each one that could add up.  How they will run we will see once people start getting them.

I would guess you can add a second fan: https://www.bitmaintech.com/productDetail.htm?pid=00020160105104607947aoAkWsJK06D0 .  I can't imagine them taking fan pins off IO board, but we have not seen the batch yet so can't confirm that.  It is just a guess.

[generalt]

The problem with ordering a fan from them though is the shipping that they add to that price.  At least the last time I checked they charged a lot for shipping just a fan.  Would have been better off getting a batch 15.

[talks_cheep]

Don't worry, there are so many fools and suckers who are buying these 1 fan S7 miners. Bitmain Chinamen are laughing all the way to the Chinamen's Bank.

[philipma1957]

Don't worry, there are so many fools and suckers who are buying these 1 fan S7 miners. Bitmain Chinamen are laughing all the way to the Chinamen's Bank.

They are doing me a favor I have more then 13 fans on hand.  but the price drop needs to be to 560 not 575.

[JaredKaragen]

Anyone think repurposing the fan from a push to a pull config would be much of an issue?

With the amount of heat the S7 puts out;  I couldnt ever imagine running mine on just one fan.    Then again;  50% or less fan speeds are common.....

Maybe that's their way to telling us that we must just deal with the noise it makes....

[SFR10]

Honestly, I don't like this move at all. It looks like a marketing gimmick to me. Recently prices of S7 have been lowered and now they removed one fan just because they know, people will (have to) purchase extra fan from them as well and as result, they'll be selling it at a win rate (not sure how much shipping will be added for a fan though). Never underestimate power of fan when it comes to air flow, it's mandatory IMO.

[mavericklm]

It's just mining getting more and more industrial and less home user friendly 

[scyth3]

It's more energy efficient with one fan 

[philipma1957]

It's more energy efficient with one fan 

Just drop the freq to 500 set the fan at 50%

Should mine 

[sidehack]

Yeah it's more energy efficient, until temps go up, and the chips start pulling more current for the same work and cancels it out and then oh also you have a hotter machine that's more likely to die early and possibly catch things around it on fire. Definitely an improvement.

[mavericklm]

I look at it and i see a prisma with temperature sensors

[HagssFIN]

If they are using good thermal adhesive and a good fan, it ain't impossible after all.
Avalon 6 comes with a one fan and at least my temps are at reasonable level.

[sidehack]

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?

[philipma1957]

If they are using good thermal adhesive and a good fan, it ain't impossible after all.
Avalon 6 comes with a one fan and at least my temps are at reasonable level.

yes it is tru the avalon 6 has 1 fan but it has huge massive heatsinks. It also pulls 1000 watts or less at the ac plug.

the s-7 has 140+ heat sinks  and it pulls 1400 watts or more at the wall.

Like I said in my case I have lots of fans so it is an easy fix.

But the price drop of 7 dollars is insulting.

It should of went to 560 not 575

sidehack has a good point  if your mining room is 70 f  or less you may be good  but if you have a 90f or more room you will suffer.

Comes down to drop the freq from 700 to 600 maybe 500 or add a fan

[laowzE]

We are making an order with coupons (many emails with BMT in last two weeks). Here is what we found:

Its not a april fools joke, it is called AntMiner S7-F1
Low noise
identical performance with low power (6000 RPM fan)
Low weight&size (may have effect on freight cost for large order?)

The fan is not same (don't know the other one):
http://www.digikey.com/product-detail/en/delta-electronics/QFR1212GHE-SP01/603-1165-ND/1850534

BMT also wrote on Twitter.
https://twitter.com/BITMAINtech

I try to upload pictures when we receive miners (this is a new account).

[notlist3d]

snip

Either it is the better version of s7.
Or only the prettiest ... for the general public.
We must try now.

It is more about being the lowest price S7 I think vs other things mentioned.  Likely they save a good amount of money selling thousands with 1 vs 2 fan's.   It's all about lowest production cost.  And coupons make lowest S7 miner price so got more attraction (at least lowest price with batch being sold).

I suspect after I thought about it they might have been testing this design for next gen.  Think about when they are designing next gen if they can keep one fan vs 2 for tens of thousands of units that will add up on savings again.

[HagssFIN]

Yeah, like they tested S7 heatsink design in S5+