ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH

[sloopy]

Can I see a picture of your Foam setup?  Also the this screeching sound is not normal as the other S7s are not like this one.  I see other people having same issues and the noise goes way beyond the garage door due to the high pitch vs 2 other S7 which can't be heard thru my entrance door which is a strong fire resistant door.  I will see what support says.  Not sure if it's due to New Year but it's been almost 2 days with no response, they were faster on the response when I was short $18 for my order due to fees just 2 days ago.  What's everyone's experience on the turn around time for response?  Is this normal?

This is brand new and within Warranty period, they should fix it.  I don't think that's asking too much.  If we keep giving in on trying to fix everything or come up with Mickey Mouse solutions, we will continue getting inferior products and  services.

Good Luck. You will not get a response over the whistling fan noise unless you are a high profile customer meaning you order a ton of miners. The little guys cannot get a bad fan replaced and they will tell you to buy one locally.
Yoshi did me a solid by helping out, but even he will tell you China is doing anything for a fan.
May as well put a piece of tape or one of the other suggestions.

I sincerely do wish you the best and I am with you as far as making as much noise as possible.
When I was done wrong I also documented everything and people here on the forum told me to forget it, they had already learned Bitmain isn't going to help. Look at all the people who are waiting on complete miners or hash boards, they could care less about a fan...unfortunately.
As long as they have the market cornered, they make the rules.

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[klondike_bar]

Can I see a picture of your Foam setup?  Also the this screeching sound is not normal as the other S7s are not like this one.  I see other people having same issues and the noise goes way beyond the garage door due to the high pitch vs 2 other S7 which can't be heard thru my entrance door which is a strong fire resistant door.  I will see what support says.  Not sure if it's due to New Year but it's been almost 2 days with no response, they were faster on the response when I was short $18 for my order due to fees just 2 days ago.  What's everyone's experience on the turn around time for response?  Is this normal?

This is brand new and within Warranty period, they should fix it.  I don't think that's asking too much.  If we keep giving in on trying to fix everything or come up with Mickey Mouse solutions, we will continue getting inferior products and  services.

Good Luck. You will not get a response over the whistling fan noise unless you are a high profile customer meaning you order a ton of miners. The little guys cannot get a bad fan replaced and they will tell you to buy one locally.
Yoshi did me a solid by helping out, but even he will tell you China is doing anything for a fan.
May as well put a piece of tape or one of the other suggestions.

I sincerely do wish you the best and I am with you as far as making as much noise as possible.
When I was done wrong I also documented everything and people here on the forum told me to forget it, they had already learned Bitmain isn't going to help. Look at all the people who are waiting on complete miners or hash boards, they could care less about a fan...unfortunately.
As long as they have the market cornered, they make the rules.

^unfortunately true and on-point.
these delta fans are worth at least $10/ea  and are heavy to ship from china, so replacing one will likely cost them up to $15 plus time spend arranging it. Due to minimal manpower, they have bigger things to deal with (this isnt good service though)

These fans are naturally loud, but sometimes theres a defect in there that doesnt read PWM, has a chipped/off-balance fan, bad bearing, etc and as a result can be much higher pitched whine/screech than normal.

your best bet is aftermarket replacement. go find a fan that can meet your airflow needs. 20% fans is about 70-80cfm, 40% fans is 90-100cfm, 80% is likely over 120cfm. a replacement will cost you $15-30 and be a better quality/noiselevel without waiting 1-2 weeks from china

ps: Spondoolies-Tech replaced my bad SP20 fan (had a defect, likely a bad bearing, and was horrifically loud compared to even an Sp10). They were the most stand-up manufacturer for support, but bitmain doesn't give much after-market focus

[marvykkio]

unfortunately if bitmain misbehaves the fault is ours, not that we rebel for fear that never sells more miner house

[citronick]

Just installed 2 x S7s (B8) to join my 5 x S7s and noticed that the "wooo-wooo-wooo" sound is not there anymore.

However, they are running hot 70-72c with 100% fan. Latest Dec15 FW applied at 700mhz.

I will keep them running at these speed and monitor them for few days.

They are hashing quite nicely at "kano.is" <--- this pool is AWESOME!!!

[philipma1957]

Just installed 2 x S7s (B8) to join my 5 x S7s and noticed that the "wooo-wooo-wooo" sound is not there anymore.

However, they are running hot 70-72c with 100% fan. Latest Dec15 FW applied at 700mhz.

I will keep them running at these speed and monitor them for few days.

They are hashing quite nicely at "kano.is" <--- this pool is AWESOME!!!

this is really simple advice  lower the fans to 80% and drop the freq until temps are 65c

[marvykkio]

firmware that is to be used for S7 batch 8? what it is on the site of bitmain?

[yslyung]

firmware that is to be used for S7 batch 8? what it is on the site of bitmain?

i'm on the latest for b8 from bmt site.

had 2 powercuts & they came back online automatically, just needed to login n a soft reboot. all good

[SLEI]

Have anybody experience of zwilla.de firmwares for S7 they have very big promises?

[Prelude]

Have anybody experience of zwilla.de firmwares for S7 they have very big promises?

Never heard of them. What are they claiming their firmware does?

[lightfoot]

Hm. Are s7's worth my time to learn to fix for other people?

Most of the miner problems seem to be the same things: Heat and power distribution. Thoughts?

[philipma1957]

Hm. Are s7's worth my time to learn to fix for other people?

Most of the miner problems seem to be the same things: Heat and power distribution. Thoughts?

your skill set. your tool set.  if both are good yeah I would say go for it.

[Seba13xp]

Was there ever a fw that allowed to hook up 9 blades to a single controller? I know that philipma1957 has 6 and that the new fw dont allow more than 3.

[VirosaGITS]

Was there ever a fw that allowed to hook up 9 blades to a single controller? I know that philipma1957 has 6 and that the new fw dont allow more than 3.

Technically, the S5+ controller allowed 9 boards but depending on which firmware you had on it, you would have 3 of the 9 boards "ghost boards". Not showing up on the WebUI.

[dmwardjr]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

I got batch 6...it is totally stable being overclocked to 625, a bit less stable (or maybe less efficient?) at 650, so I will try either of these two instead of just 600, if you have room on PSU. The funny thing, if you remember as everyone was saying that B1 "likes' heat-~60C. In my observation, B6 "likes" being cold-I got better speed and less errors at 41-45C (same goes for B7, interestingly).

625-4.15-4.2 TH (1090W at the wall); 4.3 TH at 650 (1150W)

Biodom or Anyone else,

Help me remember...  Did Batch 6 have 135 chips or 162 chips?  My question was never really answered about number of chips.  I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?

[Seba13xp]

Was there ever a fw that allowed to hook up 9 blades to a single controller? I know that philipma1957 has 6 and that the new fw dont allow more than 3.

Technically, the S5+ controller allowed 9 boards but depending on which firmware you had on it, you would have 3 of the 9 boards "ghost boards". Not showing up on the WebUI.

That is why Im asking which fw allowed all 9 to show up and hash.

[nhando]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

I got batch 6...it is totally stable being overclocked to 625, a bit less stable (or maybe less efficient?) at 650, so I will try either of these two instead of just 600, if you have room on PSU. The funny thing, if you remember as everyone was saying that B1 "likes' heat-~60C. In my observation, B6 "likes" being cold-I got better speed and less errors at 41-45C (same goes for B7, interestingly).

625-4.15-4.2 TH (1090W at the wall); 4.3 TH at 650 (1150W)

Biodom or Anyone else,

Help me remember...  Did Batch 6 have 135 chips or 162 chips?  My question was never really answered about number of chips.  I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?

135 Chips.  See website info below

5. Chip quantity per unit: 135x BM1385

https://bitmaintech.com/productDetail.htm?pid=00020151105082702881F8f0B9I405FF

[Seba13xp]

At 700MHz they're pretty much tapped out, and overclocking is not an option until we figure out how to control voltage. My OG S7s run at 6TH/s in comparison with overclocking.

I totally agree with you.  I'm coming close to making the decision to go ahead and under clock these back to 600 MHz from the 700 MHz factory setting.  If I'm not mistaken, the batch 6 (135 chips) were clocked at 600 MHz and hashed at 4.0 TH/s?  I'm thinking about treating the new 135 chip rigs as batch 6 and under clock all of them to 600 MHz for longevity.

I got batch 6...it is totally stable being overclocked to 625, a bit less stable (or maybe less efficient?) at 650, so I will try either of these two instead of just 600, if you have room on PSU. The funny thing, if you remember as everyone was saying that B1 "likes' heat-~60C. In my observation, B6 "likes" being cold-I got better speed and less errors at 41-45C (same goes for B7, interestingly).

625-4.15-4.2 TH (1090W at the wall); 4.3 TH at 650 (1150W)

Biodom or Anyone else,

Help me remember...  Did Batch 6 have 135 chips or 162 chips?  My question was never really answered about number of chips.  I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?

 S7 Batch 6  Specifications:

1. Hash Rate: 4.05 TH/s

2. Power Consumption: 1042 W + 10% (at the wall, with APW3, 93% efficiency, 25C ambient temp)

3. Power Efficiency: 0.25 J/GH + 10% (at the wall, with APW3, 93% efficiency, 25°C ambient temp)

4. Rated Voltage: 11.60 ~ 13.00V

5. Chip quantity per unit: 135x BM1385

6. Dimensions: 301mm(L)*123mm(W)*155mm(H)

7. Cooling: 2x 12038 fan

8. Operating Temperature: 0 °C to 40 °C

9. Network Connection: Ethernet

10. Default Frequency: 600M

[RichBC]

Biodom or Anyone else,

Help me remember...  Did Batch 6 have 135 chips or 162 chips?  My question was never really answered about number of chips.  I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?

Batch 6,8,9 are all 135 chip. Efficiency should be similar so long as the Buck Converter is set to the same voltage, which it may well not be, in all batches?

Rich

[VirosaGITS]

Biodom or Anyone else,

Help me remember...  Did Batch 6 have 135 chips or 162 chips?  My question was never really answered about number of chips.  I'm curious if I would get similar efficiency with under clocking as Biodom mentions here with Batch 6 but similar with Batch 8?

Batch 6,8,9 are all 135 chip. Efficiency should be similar so long as the Buck Converter is set to the same voltage, which it may well not be, in all batches?

Rich

Can a buck converter provide variable voltage depending on the clock the miner is set at? Some people said by underclocking it raised their efficiency and that should not happen unless the voltage is variable to an extent or there is more efficiency loss at higher speed.

[RichBC]

Can a buck converter provide variable voltage depending on the clock the miner is set at? Some people said by underclocking it raised their efficiency and that should not happen unless the voltage is variable to an extent or there is more efficiency loss at higher speed.

If it is tied into the main controller then it could be adjusting the voltage, until someone traces the circuit / makes some measurements we will not know.

But agreed as we have all discovered just changing the clock frequency and leaving the voltage the same leaves the efficiency virtually the same. What sort of improvement to efficiency have people seen?


Rich