ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 178.

fr4nkthetank

legendary

Activity: 2294

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Now the money is free, and so the people will be

Quote from: yslyung on December 01, 2015, 06:08:43 AM

careful abt UC/OC ... many do not have enuff knowledge or experience to do it.
1st of all the PSU MUST be able to supply sufficient voltage if one wanna OC or the voltage to be lowered if want to UC.
i see most of the guys here are using ATX PSU which does NOT provide enuff voltage even to run at stock freq's.
i think 12V + 5% is "Recommended" ?
ATX PSU can hardly provide 12V with loads.
again it VOIDS warranty.
get a good reliable PSU with adjustable voltage after the warranty expires then come back here & continue discussing UC/OC.
ah ha, also pcie cables that are being used. most are 18 awg. if 1 can afford to buy an s7 at such price, why is it that difficult to get a reliable PSU + good quality cables ?
i may sound like an a*s here now but just sharing & hopefully no one comes & say i shouldn't have done that & now my miner is burnt or exploded or my house caught fire etc.
have fun with the miners. just sharing my 2 sat's worth opinion.

There should be no problem in lowering the frequency a bit. a good atx psu like the 1600w g2 evga is sufficient. provided cables should be good. in any case, feel cables for heat to be sure. The batch 8 voltage is : 4. Rated Voltage: 11.60 ~13.00V according to specs, but its true earlier batches were 12v or something like that.

fr4nkthetank

legendary

Activity: 2294

Merit: 1182

Now the money is free, and so the people will be

Quote from: Seba13xp on December 01, 2015, 12:44:00 AM

I have a evga 1600w g2 sitting here and wounding if I can use it to power the Antminer s7 that is coming later tomorrow, any thoughts?

I have the same. yes, you have more than enough pci cables, and the wires are good quality

dog1965

sr. member

Activity: 392

Merit: 250

Quote from: FlensGold on December 01, 2015, 08:46:24 AM

Did anyone try to power an Antminer S7 (5,06TH/s) with a EVGA SuperNova 1300 G2 PSU (http://www.evga.com/Products/Product.aspx?pn=120-G2-1300-XR) ? Can this work?

I use two of those PSU's for the S7 and S5 together no problems but if I were just to run the S7 alone I would use two of them trust me.

vortexz

legendary

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Anyone have a Batch 8 150 $ Coupon that is not going to use and is willing to donate ??
my e-mail is [email protected]

wolfen

hero member

Activity: 770

Merit: 523

Quote from: FlensGold on December 01, 2015, 08:46:24 AM

Did anyone try to power an Antminer S7 (5,06TH/s) with a EVGA SuperNova 1300 G2 PSU (http://www.evga.com/Products/Product.aspx?pn=120-G2-1300-XR) ? Can this work?

I'm sure it will work, but you want to be at 80% of the max rating of the PSU for safety.
That is what I do.
I think 5.06 is 1300 watts.

FlensGold

legendary

Activity: 1405

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Did anyone try to power an Antminer S7 (5,06TH/s) with a EVGA SuperNova 1300 G2 PSU (http://www.evga.com/Products/Product.aspx?pn=120-G2-1300-XR) ? Can this work?

wolfen

hero member

Activity: 770

Merit: 523

A single Batch 1 miner stopped responding.
Did a power reset using the ap7911 PDU remotely.
All fine now.
Saved me a trip to the datacenter.

Darthswan

hero member

Activity: 818

Merit: 508

Quote from: vortexz on December 01, 2015, 07:15:27 AM

Anyone OCed his Batch 7 to 650 Mhz ? is it performing well ??

Not yet. Right now, maybe later. It is running steady at 5Th.

vortexz

legendary

Activity: 1120

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Anyone OCed his Batch 7 to 650 Mhz ? is it performing well ??

KeezAZA

full member

Activity: 224

Merit: 100

https://eloncity.io

Quote from: dmwardjr on December 01, 2015, 04:13:42 AM

Quote from: KeezAZA on December 01, 2015, 04:07:24 AM

Is there any option on in the S7 config to change to the frequency at different times like the S3?
On my S3 I am able to reboot the unit every 12 hours.
I am thinking if I get a S7 under clocking it to 500 during the day and 650 at night. Less heat and lower electricity rates.

I haven't bothered under clocking any of my S7's yet. All of mine are default at 625 MHz and lower. So, you never lowered the voltage when under clocking your S3's? If the voltage was changed, the S3 had to be rebooted. Same goes for the S5.

I didn't know the S3 had that option. It makes sense if one has cheaper power rates at certain times during the day.

If such an option is available, what tab would it be under? If you can show it on the S3 with a screen shot, it would be helpful.

On the S3 under System --> Scheduled Tasks tab.

You can add commands to the crontab.

I currently do a reboot every 12hours on the S3 as i get one X every 14-15 hours.

So in theroy if i had that option one should be able to step down the freq in the same tab.

crazyearner

legendary

Activity: 1820

Merit: 1001

Quote from: yslyung on December 01, 2015, 06:08:43 AM

careful abt UC/OC ... many do not have enuff knowledge or experience to do it.

1st of all the PSU MUST be able to supply sufficient voltage if one wanna OC or the voltage to be lowered if want to UC.

i see most of the guys here are using ATX PSU which does NOT provide enuff voltage even to run at stock freq's.

i think 12V + 5% is "Recommended" ?

ATX PSU can hardly provide 12V with loads.

again it VOIDS warranty.

get a good reliable PSU with adjustable voltage after the warranty expires then come back here & continue discussing UC/OC.

ah ha, also pcie cables that are being used. most are 18 awg. if 1 can afford to buy an s7 at such price, why is it that difficult to get a reliable PSU + good quality cables ?

i may sound like an a*s here now but just sharing & hopefully no one comes & say i shouldn't have done that & now my miner is burnt or exploded or my house caught fire etc.

have fun with the miners. just sharing my 2 sat's worth opinion.

it voids I totally understand that or maybe to have units that are separate like say S7 overclockers edition for the people who want to do such activity. 5% is good for overclocking but people with the know how want to take it beyond that and or look to under volt it to take small amount of hash off and massive drop in energy use.

yslyung

legendary

Activity: 1500

Merit: 1002

Mine Mine Mine

careful abt UC/OC ... many do not have enuff knowledge or experience to do it.

1st of all the PSU MUST be able to supply sufficient voltage if one wanna OC or the voltage to be lowered if want to UC.

i see most of the guys here are using ATX PSU which does NOT provide enuff voltage even to run at stock freq's.

i think 12V + 5% is "Recommended" ?

ATX PSU can hardly provide 12V with loads.

again it VOIDS warranty.

get a good reliable PSU with adjustable voltage after the warranty expires then come back here & continue discussing UC/OC.

ah ha, also pcie cables that are being used. most are 18 awg. if 1 can afford to buy an s7 at such price, why is it that difficult to get a reliable PSU + good quality cables ?

i may sound like an a*s here now but just sharing & hopefully no one comes & say i shouldn't have done that & now my miner is burnt or exploded or my house caught fire etc.

have fun with the miners. just sharing my 2 sat's worth opinion.

crazyearner

legendary

Activity: 1820

Merit: 1001

Maybe an idea for bitmain in future ones for thoes who want to overclock or underclock and be able to tweak voltages maybe add on a device that allows you to set the voltage using a regulator that can be turned up or down giving more usability to the customer. Having a min volt and max what can crank it upto as a max safe.

dmwardjr

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Activity: 1302

Merit: 1318

Technical Analyst/Trader

Quote from: KeezAZA on December 01, 2015, 04:07:24 AM

Is there any option on in the S7 config to change to the frequency at different times like the S3?
On my S3 I am able to reboot the unit every 12 hours.
I am thinking if I get a S7 under clocking it to 500 during the day and 650 at night. Less heat and lower electricity rates.

I haven't bothered under clocking any of my S7's yet. All of mine are default at 625 MHz and lower. So, you never lowered the voltage when under clocking your S3's? If the voltage was changed, the S3 had to be rebooted. Same goes for the S5.

I didn't know the S3 had that option. It makes sense if one has cheaper power rates at certain times during the day.

If such an option is available, what tab would it be under? If you can show it on the S3 with a screen shot, it would be helpful.

KeezAZA

full member

Activity: 224

Merit: 100

https://eloncity.io

Is there any option on in the S7 config to change to the frequency at different times like the S3?
On my S3 I am able to reboot the unit every 12 hours.
I am thinking if I get a S7 under clocking it to 500 during the day and 650 at night. Less heat and lower electricity rates.

dmwardjr

legendary

Activity: 1302

Merit: 1318

Technical Analyst/Trader

Quote from: Biodom on December 01, 2015, 03:55:35 AM

this is strange, but my miners on 9/15 software never go above 4400 rpm when i set them at 75%.
I think that % just sets up the MAXIMUM speed and it normally runs much lower.
It is true at least for B1, B2, B4, B5, don't know yet re B6 and B7.

4400 RPM's is about the limit of these particular fans. 4500 RPM's might be the limit. I would think at least 3700 RPM's would be sufficient to keep the rig from burning up if the internet was to go out on you. Of course this depends on the ambient.

Biodom

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Quote from: yslyung on December 01, 2015, 03:19:39 AM

why set fan to 75% or higher ?

@ 75% i'm seeing roughly 4680/4200 rpm

the chips still run when internet is loss ? if it does, it should be maintaining the same temp at whichever manual speed that it is set to, say 60% fan manual gives me a reading of 55/56/57 deg C.

if i'm not mistaken the fan max rpm is 4800 rpm, 75% is actually pretty close to max rpm of the 12038 fan.

of course if we can set lower fan speed will be good as it does saves some power, reduce some wear & tear too, yeah yeah yeah we all know about the heat & noise, but if one wants to save the miner then deal with the heat & noise.

just curious Huh

imo, if chips are below 70 deg C (roughly abt 10% before it cuts off @ default 80 deg C, the chips are rated to withstand higher temps but other components might not survive over long periods of time) are safe. i wonder where did the magical number of 60C or below came from.

certain chips does have an optimum temp to perform well, in this case me thinks around 60 deg C as there are others reported higher HW error if temps are too low.

just my 2 cents.

this is strange, but my miners on 9/15 software never go above 4400 rpm when i set them at 75%.
I think that % just sets up the MAXIMUM speed and it normally runs much lower.
It is true at least for B1, B2, B4, B5, don't know yet re B6 and B7.

dmwardjr

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Technical Analyst/Trader

Quote from: citronick on December 01, 2015, 03:18:48 AM

I have a Batch 8 on the way - and given the 135 chips 700mhz setting, I would like to underclock the rig to hit a "safe zone" just like the previous 600mhz batches -- I am hoping I can extend this rig's life as much as possible. Does this make sense?

Most certainly...

I believe the S7 will probably be around as long as the S3; in terms of still making profit, for as long as a 2 year period or longer. If I were to get Batch 8, I would under clock to 650 MHz. My opinion. Others can do as they wish.

EDIT: I'm going to "baby" mine to the fullest. Grin

crazyearner

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Quote from: citronick on December 01, 2015, 03:18:48 AM

Quote from: blockchainmines on December 01, 2015, 03:00:20 AM

Quote from: dmwardjr on December 01, 2015, 02:50:05 AM

Quote from: blockchainmines on December 01, 2015, 02:40:43 AM

Absolutely, I would never do that, I was talking about getting the firmware for the other 19 that are not batch 7 to bring them up to batch 7 standards. I am very happy with thew two that arrive tonight.

I will share with you the same thing I have told someone else. I'm sure others will agree.

There is nothing wrong with the September firmware. The October firmware SUPPOSEDLY fixed the issue with rigs burning up after internet loss. I've seen two people in the forum who have had their units replaced because of burning up after losing interest and they had the October firmware. One of them lost 3 rigs due to burning up after internet loss.

Don't believe the hype about the October firmware. It does not fix that issue. It's not worth risking a $1,700 to $2,000 investment depending on the firmware having fixed that issue because it hasn't. Your investment is safer if the fan is set to manual with a setting of 75% or higher. It may be less than 75% is okay but that depends on your ambient temperature.

I'm keeping all of mine from now on with the firmware they come with and setting the fans to "manual" to avoid burning them up if the internet goes down. We already have confirmation your rigs will not burn up if you have the fans set to manual at 75% or higher. It's possible they may not burn up with the fan set at lower percentage but 75% is the lowest we have confirmation of thus far.

The S7 is an EXCELLENT rig in many aspects. The only issue [in my opinion] is the risk of burning up the rig during a long period of internet failure. How long? Who knows...

BITMAIN is still installing the September Firmware and probably mining with the September Firmware on their own personal rigs. If it was so important, I would think they would already have the updated firmware pre loaded. Even if they were to have it pre-loaded, I would not risk a $1,500 to $2,000 investment on this issue. Go to manual with the fan and do not trust the firmware update to fix the issue. That's my opinion.

I totally agree with you, I maybe misunderstood your earlier post. I thought you had the firmware that bitmain was using for the 625 rigs. However, I have no problem running my machines at a lower setting as I am fully aware for what overclocking or pushing these units to hard can cause damage wise. The financial risk is not worth it. That is why I am so against bitmains batch 8 with the 135 chip and them pushing the chips to 700 MHZ. I think that has failure written all over it and driven by greed. Just my opinion.

I have a Batch 8 on the way - and given the 135 chips 700mhz setting, I would like to underclock the rig to hit a "safe zone" just like the previous 600mhz batches -- I am hoping I can extend this rig's life as much as possible. Does this make sense?

Sounds like a good option maybe do some pencil mod if their is around reduce the voltage used take some the GH down a little but get a much more effective unit. Looking to do on my old miners as pointed out in a topic made about it and found links to s3 units people been doing to and proving good. Maybe can use the same methods to produce some results on the s7 batch 8 when you get it.

yslyung

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Activity: 1500

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Mine Mine Mine

why set fan to 75% or higher ?

@ 75% i'm seeing roughly 4680/4200 rpm

the chips still run when internet is loss ? if it does, it should be maintaining the same temp at whichever manual speed that it is set to, say 60% fan manual gives me a reading of 55/56/57 deg C.

if i'm not mistaken the fan max rpm is 4800 rpm, 75% is actually pretty close to max rpm of the 12038 fan.

of course if we can set lower fan speed will be good as it does saves some power, reduce some wear & tear too, yeah yeah yeah we all know about the heat & noise, but if one wants to save the miner then deal with the heat & noise.

just curious Huh

imo, if chips are below 70 deg C (roughly abt 10% before it cuts off @ default 80 deg C, the chips are rated to withstand higher temps but other components might not survive over long periods of time) are safe. i wonder where did the magical number of 60C or below came from.

certain chips does have an optimum temp to perform well, in this case me thinks around 60 deg C as there are others reported higher HW error if temps are too low.

just my 2 cents.

Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 178. (Read 527809 times)