New one fan S7 - page 6. | Bitcointalksearch.org

philipma1957

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Quote from: sidehack on April 02, 2016, 02:22:14 PM

Yeah but the S7 generates 2-2.5 times the heat of an S5, so that's by no means a valid comparison.

590-620 watts vs 1300-1450 watts

pretty big difference.

I just think the fan will move at 5200rpm nonstop

and people will need to downclock.

I would buy one from them at 560 but not 575. My stock of add-on fans would work.

I feel the drop from 582 to 575 covers the diff and the price moves but not the missing fan.

price truly needs to be 560. I have 34 coupons sitting in my account.

sidehack

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Curmudgeonly hardware guy

Yeah but the S7 generates 2-2.5 times the heat of an S5, so that's by no means a valid comparison.

hhumaidan

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I have ordered 5 S7 miners of the 1 Fan.

Delivery is fast to my area.

Expected delivery is Thursday.

Fingers crossed

leowonderful

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Bitcoin FTW!

Quote from: philipma1957 on April 01, 2016, 07:22:12 AM

Quote from: HagssFIN on April 01, 2016, 04:14:58 AM

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

Bitmain really did cut the price down to the bare minimum... maybe next they'll take the stickers off and save a few pennies on their future miners. Yeah, the boards will probably run real hot and it'll take either a cold room or a freq frop for them to run at a good temperature. I'm sure most people will just install their own fans so the 1 fan won't be such a big problem. Looking at the S5, it's also running on only 1 fan so besides slightly higher temps the miner probably won't suffer.

Matias

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Quote from: laowzE on April 01, 2016, 09:43:27 PM

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

They say 1 fan is naturally more quiet than two fans. Since fan noise is greatly dependent upon rpm, I wouldn't say, that one fan running on higher rpm is necessarily more quiet than two fans running on lower rpm.

notlist3d

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Quote from: HagssFIN on April 02, 2016, 04:42:20 AM

Yeah, like they tested S7 heatsink design in S5+

And the 3 hashing boards per miner they tested in them, which I have actually have groan to like. Took me a while to get use to it but at this point with having big PSU's around and 240 I kinda like the power of having 1/3 more in each unit.

Only thing I wish I could get them to do is use RPI's as controller as easy to get replacement and sd backup is so easy. But I think BBB are here to stay.

HagssFIN

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Electrical engineer. Mining since 2014.

Yeah, like they tested S7 heatsink design in S5+

notlist3d

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Quote from: ?? on ??

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.

laowzE

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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).

philipma1957

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'The right to privacy matters'

Quote from: HagssFIN on April 01, 2016, 04:14:58 AM

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

sidehack

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Curmudgeonly hardware guy

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?

HagssFIN

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Electrical engineer. Mining since 2014.

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.

mavericklm

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

sidehack

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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.

philipma1957

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'The right to privacy matters'

Quote from: scyth3 on March 31, 2016, 10:23:49 PM

It's more energy efficient with one fan Cool

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

Should mine Wink

scyth3

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It's more energy efficient with one fan Cool

mavericklm

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

SFR10

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Crypto Swap Exchange

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.

JaredKaragen

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My AR-15 ID's itself as a toaster. Want breakfast?

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....

philipma1957

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'The right to privacy matters'

Quote from: talks_cheep on March 31, 2016, 07:52:31 PM

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.

Topic: New one fan S7 - page 6. (Read 9869 times)