[Guide] Dogie's Comprehensive Bitmain AntMiner S2 Setup [HD] - page 18.

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: nikolaz on May 09, 2014, 06:37:24 AM

This is bit of a stupid question, I want to replace the S2 PSU and I am thinking of getting "EVGA SuperNOVA G2 1300W"

http://www.evga.com/articles/00755/images/univ/1k_Mod_Face_lrg.jpg

My stupid question is would I be using the VGA ports and using the provided cable marked VGA (https://www.moddiy.com/product_images/uploaded_images/dual-6-2.jpg). Just want to be 100% sure before I plug anything.

Thanks

Yes you would, they're known as PCI-E cables.

Angela8488

full member

Activity: 127

Merit: 100

Bitmain AntMiner S1 is the best I've seen with the mining machine, it is stable, and the power consumption is very small. I like it very much.

nikolaz

member

Activity: 98

Merit: 10

This is bit of a stupid question, I want to replace the S2 PSU and I am thinking of getting "EVGA SuperNOVA G2 1300W"

http://www.evga.com/articles/00755/images/univ/1k_Mod_Face_lrg.jpg

My stupid question is would I be using the VGA ports and using the provided cable marked VGA (https://www.moddiy.com/product_images/uploaded_images/dual-6-2.jpg). Just want to be 100% sure before I plug anything.

Thanks

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Why do the S1s have voltage control while the S2s don't? Unless you meant that range when pencil modded.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: dogie on May 03, 2014, 02:40:53 PM

Quote from: Wookie50 on May 02, 2014, 01:21:58 PM

From my experience, it seems that overclocking the S2 just makes little sense.

Replacing the PSU (and paying an extra $350) + increasing load by 0.5amps just to get an extra 50 GH/s seems more risky than the value it will bring.

Would love to see what other people think.

Thats what I also concluded and stopped. Its just not worth the time, power, potential for failure or effort.

A 1200W psu can get 1050-1100GH from the unit. Clocking anything higher would require pencil modding of 40 resitors per S2 unit.

IMO - the S1 is still the king. about $1.15/GH when overclocked, and can underclock to ~160GH/300W without voltage modification, and probably as low as 110GH/120W if heavily underclocked during the summer months. Only issue is space requirements and the power/cooling requirements when running them at 2w/GH initially.

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: freebit13 on May 02, 2014, 01:54:10 PM

If anyone is interested in load-balancing their machine or adding any other cgminer parameters, here's how to do it:

ssh into your S2 with putty or similar software (root,admin)

Type the following, exactly as written; a new line means press enter/return:

Code:

cd /etc/init.d/
vi cgminer.sh
i

Move down to line 51 in the code, starting with

Code:

PARAMS="--bitmain-dev....

and add your parameters in that string, something like:

Code:

PARAMS="--balance --bitmain-dev....

and press "esc", then type:

Code:

:wq

Now go to the "Miner Configuration" tab in the GUI and click "Save & Apply" to restart cgminer with the new settings and it should work.

Unfortunately, a reboot will set this all back to the default, so if anyone knows how to actually save any of the settings changed, please let me know.

I think this approach is saving something into a volatile cache which works until the unit is power cycled. The beagles clear that every time they restart, so this would have to be integrated into the firmware.

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: Wookie50 on May 02, 2014, 01:21:58 PM

From my experience, it seems that overclocking the S2 just makes little sense.

Replacing the PSU (and paying an extra $350) + increasing load by 0.5amps just to get an extra 50 GH/s seems more risky than the value it will bring.

Would love to see what other people think.

Thats what I also concluded and stopped. Its just not worth the time, power, potential for failure or effort.

freebit13

hero member

Activity: 616

Merit: 500

I got Satoshi's avatar!

If anyone is interested in load-balancing their machine or adding any other cgminer parameters, here's how to do it:

ssh into your S2 with putty or similar software (root,admin)

Type the following, exactly as written; a new line means press enter/return:

Code:

cd /etc/init.d/
vi cgminer.sh
i

Move down to line 51 in the code, starting with

Code:

PARAMS="--bitmain-dev....

and add your parameters in that string, something like:

Code:

PARAMS="--balance --bitmain-dev....

and press "esc", then type:

Code:

:wq

Now go to the "Miner Configuration" tab in the GUI and click "Save & Apply" to restart cgminer with the new settings and it should work.

Unfortunately, a reboot will set this all back to the default, so if anyone knows how to actually save any of the settings changed, please let me know.

Wookie50

newbie

Activity: 27

Merit: 0

Quote from: dogie on May 02, 2014, 03:07:15 AM

Quote from: Wookie50 on May 01, 2014, 03:46:06 PM

Quote from: dogie on April 28, 2014, 02:02:13 AM

Quote from: Kuma on April 28, 2014, 01:16:20 AM

Quote from: Wookie50 on April 28, 2014, 01:06:26 AM

Guys -- a noob question:

I have a Corsair 1200i that I'd like to replace the S2's Enermax PSU. However the pinouts aren't compatible ... can't plug in the motherboard plugs from the S2 into the modular connection of the 1200i. Is there an adapter I need to use?

Thanks!

You need to use cables from your Corsair 1200i. I'm guessing you just disconnected cables right from the PSU, am I right?

This. Remove all the power cables that were in the S2 and start again.

I removed half the modules and unhooked the power cables to the motherboard. The new cables from the Corsair fit perfectly ... so your suggestion worked. Thank you!

Tried overclocking to 212 and getting 2-3% reject rate, despite the better PSU. Going to try to scale down a bit to see if it makes a difference.

Chips are voltage limited very quicky, and swapping out the PSU is more so to prevent the old one from blowing up when pushed.

From my experience, it seems that overclocking the S2 just makes little sense.

Replacing the PSU (and paying an extra $350) + increasing load by 0.5amps just to get an extra 50 GH/s seems more risky than the value it will bring.

Would love to see what other people think.

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: Wookie50 on May 01, 2014, 03:46:06 PM

Quote from: dogie on April 28, 2014, 02:02:13 AM

Quote from: Kuma on April 28, 2014, 01:16:20 AM

Quote from: Wookie50 on April 28, 2014, 01:06:26 AM

Guys -- a noob question:

I have a Corsair 1200i that I'd like to replace the S2's Enermax PSU. However the pinouts aren't compatible ... can't plug in the motherboard plugs from the S2 into the modular connection of the 1200i. Is there an adapter I need to use?

Thanks!

You need to use cables from your Corsair 1200i. I'm guessing you just disconnected cables right from the PSU, am I right?

This. Remove all the power cables that were in the S2 and start again.

I removed half the modules and unhooked the power cables to the motherboard. The new cables from the Corsair fit perfectly ... so your suggestion worked. Thank you!

Tried overclocking to 212 and getting 2-3% reject rate, despite the better PSU. Going to try to scale down a bit to see if it makes a difference.

Chips are voltage limited very quicky, and swapping out the PSU is more so to prevent the old one from blowing up when pushed.

Wookie50

newbie

Activity: 27

Merit: 0

Quote from: dogie on April 28, 2014, 02:02:13 AM

Quote from: Kuma on April 28, 2014, 01:16:20 AM

Quote from: Wookie50 on April 28, 2014, 01:06:26 AM

Guys -- a noob question:

I have a Corsair 1200i that I'd like to replace the S2's Enermax PSU. However the pinouts aren't compatible ... can't plug in the motherboard plugs from the S2 into the modular connection of the 1200i. Is there an adapter I need to use?

Thanks!

You need to use cables from your Corsair 1200i. I'm guessing you just disconnected cables right from the PSU, am I right?

This. Remove all the power cables that were in the S2 and start again.

I removed half the modules and unhooked the power cables to the motherboard. The new cables from the Corsair fit perfectly ... so your suggestion worked. Thank you!

Tried overclocking to 212 and getting 2-3% reject rate, despite the better PSU. Going to try to scale down a bit to see if it makes a difference.

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: railzand on May 01, 2014, 06:59:59 AM

wow thanks so much

No problem, it's a known bug that can occur during power cycles. Minimise turning off the unit where possible.

railzand

sr. member

Activity: 462

Merit: 250

Lux e tenebris

wow thanks so much

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: railzand on May 01, 2014, 03:09:36 AM

I've got a hosted S2 which suddenly failed. The hosts said:

Removed all of the blades one at a time. Unpluged and replugged all power. tested all power. attempted factory reset.

It looks like the TPLINK has a corrupted card or is dead?

Have you heard of this as a likely fault?

edited

Sd card corruption is common, you need a copy of the image and flash it with the image flashing software. There are some links around page 88 in the sales thread. Will take them 10 mins and is really simple.

railzand

sr. member

Activity: 462

Merit: 250

Lux e tenebris

I've got a hosted S2 which suddenly failed. The hosts said:

Removed all of the blades one at a time. Unpluged and replugged all power. tested all power. attempted factory reset.

It looks like the TPLINK has a corrupted card or is dead?

Have you heard of this as a likely fault?

edited

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: klondike_bar on April 29, 2014, 02:22:09 PM

I still think that these units could handle 1280GH/1500W if the resistors were just set just a bit differently for a few extra millivolts to reduce the amperage and allow a little further tuning into the 225-250MHz range (frequency 0981 would give 250MHz, or about 1280GH)

You'd have more like 1600+W and every few GH after that would be at 1.5-2W per GH. Maybe its worth it for some, but its only going to be worth it for a month or so before you're going to be downclocking and wanting to reverse your mod again.

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: dogie on April 29, 2014, 01:24:36 PM

Quote from: klondike_bar on April 29, 2014, 12:23:57 PM

also, currently trying out 6206 (215.625MHz) on a U1, and expect to implement it on my S2 after a few more minutes of confirmation. 212.5MHz gave me 0.75% hw errors while 218.75MHz was about 2.02%.

hopefully 215.625MHz will be around 1-1.2% error rate and thus about the highest stable speed for an antminer S2 (batch 2, external DPS-2000 PSU)

Have you set the U1 to the same voltage as on the S2s?

no i haven't - my main use of the U1 is to make sure the code isnt wrong and causing too high, low, or impossible a frequency and thus hardware failure.

6206 worked fine on the U1 (1.730GH average) and is now implemented on the S2 problem free (1098GH, 1.136% hw errors) after 1.5 hours of operation. Presumably there's a ~1180W power draw to go with it, but my 208V PDU is not metered. Temps range from 48-55 degrees

still waiting on someone to identify which resistor on the S2 would allow pencil-modding to raise the voltage. The chips and arrangements are quite similar to the S1, but not identical enough that i can firmly state 'it is resister Rxx'. I would love to be able to slightly bump up the voltage on some of the hashing boards to see the effects on hashrate, but I assume if temps get much higher than 55C (board 1) the error rate might really start to jump up.

I still think that these units could handle 1280GH/1500W if the resistors were just set just a bit differently for a few extra millivolts to reduce the amperage and allow a little further tuning into the 225-250MHz range (frequency 0981 would give 250MHz, or about 1280GH)

dogie

legendary

Activity: 1666

Merit: 1185

dogiecoin.com

Quote from: klondike_bar on April 29, 2014, 12:23:57 PM

also, currently trying out 6206 (215.625MHz) on a U1, and expect to implement it on my S2 after a few more minutes of confirmation. 212.5MHz gave me 0.75% hw errors while 218.75MHz was about 2.02%.

hopefully 215.625MHz will be around 1-1.2% error rate and thus about the highest stable speed for an antminer S2 (batch 2, external DPS-2000 PSU)

Have you set the U1 to the same voltage as on the S2s?

klondike_bar

legendary

Activity: 2128

Merit: 1005

ASIC Wannabe

Quote from: dogie on April 26, 2014, 05:11:19 PM

Quote from: klondike_bar on April 26, 2014, 12:26:31 PM

...stuff

Please don't ask for tips in my thread, even I don't have a tip address.

fixed - sorry to tread on toes!

also, currently trying out 6206 (215.625MHz) on a U1, and expect to implement it on my S2 after a few more minutes of confirmation. 212.5MHz gave me 0.75% hw errors while 218.75MHz was about 2.02%.

hopefully 215.625MHz will be around 1-1.2% error rate and thus about the highest stable speed for an antminer S2 (batch 2, external DPS-2000 PSU)

Wookie50

newbie

Activity: 27

Merit: 0

Quote from: dogie on April 28, 2014, 02:02:13 AM

Quote from: Kuma on April 28, 2014, 01:16:20 AM

Quote from: Wookie50 on April 28, 2014, 01:06:26 AM

Guys -- a noob question:

I have a Corsair 1200i that I'd like to replace the S2's Enermax PSU. However the pinouts aren't compatible ... can't plug in the motherboard plugs from the S2 into the modular connection of the 1200i. Is there an adapter I need to use?

Thanks!

You need to use cables from your Corsair 1200i. I'm guessing you just disconnected cables right from the PSU, am I right?

This. Remove all the power cables that were in the S2 and start again.

Thanks for the suggestion! I was hoping to just disconnect the S2 cables from the Enermax and plug them into the Corsair. No go on that -- S2 cables don't fit into the Corsair plugs. Bummer.

Based on your suggestion, I'm assuming that the Corsair cables will plug into the S2 -- haven't tried it yet but will do so and report back. Need to take all the modules out of the S2 again to pull this off since the cables do go under the modules.

Topic: [Guide] Dogie's Comprehensive Bitmain AntMiner S2 Setup [HD] - page 18. (Read 63120 times)