Overclocking antminer S5 | Bitcointalksearch.org

notlist3d

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Activity: 1456

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Quote from: miguportugal on May 30, 2015, 12:00:56 PM

Quote from: pekatete on May 30, 2015, 08:11:12 AM

Quote from: miguportugal on May 30, 2015, 06:11:33 AM

i fit an S3 fan but the temperature rise 10º
one blade goes from 52º to 64º the other blade goes from 64º to 74º
the fan was extracting air.

this dont make sense to me. Can someone explain why

If you fit an S3 fan and you are overclocking, you'll have to do the blue-wire hack, i.e disconnect the blue wire to have it running at full pelt as having it controlled by the bizzare S5 PWM firmware will simply muck your efforts up.

Yes, i just connect the fan directly to psu 12v.

After a few tests i think i already understand the problem.
The heatsink is not very hot but the board is very very hot so the temp sensor is very hot.
We need to remove the hot from the board so We need to fit some heatsink in the back of the chip (back of the board).

Now my ant s5 is like this
https://www.dropbox.com/s/tlvc3wt49d86guc/FullSizeRender%2020.jpg?dl=0
https://www.dropbox.com/s/pgdu8mc3w0fd366/FullSizeRender%2019.jpg?dl=0
https://www.dropbox.com/s/ioa1rpxerqggomd/FullSizeRender%2018.jpg?dl=0

At 20º ambient temp the result is

https://www.dropbox.com/s/llncm34vwj59n9q/s5_425_sem_tampas.png?dl=0

Wow freq of 425 no wonder it's getting hot. You are really pushing it very hard.

Even if adding another heatsink and if you redid thermal past it still will run hot. Just very few go to that level on overclock.

miguportugal

newbie

Activity: 42

Merit: 0

Quote from: pekatete on May 30, 2015, 08:11:12 AM

Quote from: miguportugal on May 30, 2015, 06:11:33 AM

i fit an S3 fan but the temperature rise 10º
one blade goes from 52º to 64º the other blade goes from 64º to 74º
the fan was extracting air.

this dont make sense to me. Can someone explain why

If you fit an S3 fan and you are overclocking, you'll have to do the blue-wire hack, i.e disconnect the blue wire to have it running at full pelt as having it controlled by the bizzare S5 PWM firmware will simply muck your efforts up.

Yes, i just connect the fan directly to psu 12v.

After a few tests i think i already understand the problem.
The heatsink is not very hot but the board is very very hot so the temp sensor is very hot.
We need to remove the hot from the board so We need to fit some heatsink in the back of the chip (back of the board).

Now my ant s5 is like this
https://www.dropbox.com/s/tlvc3wt49d86guc/FullSizeRender%2020.jpg?dl=0
https://www.dropbox.com/s/pgdu8mc3w0fd366/FullSizeRender%2019.jpg?dl=0
https://www.dropbox.com/s/ioa1rpxerqggomd/FullSizeRender%2018.jpg?dl=0

At 20º ambient temp the result is

https://www.dropbox.com/s/llncm34vwj59n9q/s5_425_sem_tampas.png?dl=0

pekatete

hero member

Activity: 518

Merit: 500

Quote from: miguportugal on May 30, 2015, 06:11:33 AM

i fit an S3 fan but the temperature rise 10º
one blade goes from 52º to 64º the other blade goes from 64º to 74º
the fan was extracting air.

this dont make sense to me. Can someone explain why

If you fit an S3 fan and you are overclocking, you'll have to do the blue-wire hack, i.e disconnect the blue wire to have it running at full pelt as having it controlled by the bizzare S5 PWM firmware will simply muck your efforts up.

notlist3d

legendary

Activity: 1456

Merit: 1000

Quote from: miguportugal on May 30, 2015, 06:11:33 AM

i fit an S3 fan but the temperature rise 10º
one blade goes from 52º to 64º the other blade goes from 64º to 74º
the fan was extracting air.

this dont make sense to me. Can someone explain why

You are overclocking it a pretty good amount so it will be hot, no suprise there. One side could have better thermal paste applied or something.

Does one side get more cooling then other?

miguportugal

newbie

Activity: 42

Merit: 0

i fit an S3 fan but the temperature rise 10º
one blade goes from 52º to 64º the other blade goes from 64º to 74º
the fan was extracting air.

this dont make sense to me. Can someone explain why

miguportugal

newbie

Activity: 42

Merit: 0

After 9 hour

at 400 mhz 1316gh Hw 0,0004

temp 54 61 fan 3840 (very very loud)

philipma1957

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'The right to privacy matters'

Quote from: miguportugal on May 29, 2015, 05:37:18 PM

After one hour

at 425 mhz 1386gh Hw 0,018

temp 52 63 fan 3840 (very very loud)

back off to 400 and compare numbers.

then try 412.5 or 406

I maxed at 412.5

425 is really good

miguportugal

newbie

Activity: 42

Merit: 0

After one hour

at 425 mhz 1386gh Hw 0,018

temp 52 63 fan 3840 (very very loud)

Rabinovitch

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Activity: 2030

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BTCLife.global participant

Well, here are my OC results. I am too lasy to arrange the data into some nice table.

Quote

P.S. after all that I made some additional measurements at miner's side (I started to measure HWE with M's Ant Monitor a bit later, after measurements for frequency values 356.25 and 375), about 1 hour and more for each frequency value:

Frequency 350 (default) - 1157+ Gh/s, 0.0001% HWE (1 HW per hour), 616 Wt
Frequency 356.25 - 1160+ Gh/s, 616 Wt
Frequency 362.5 - 1200+ Gh/s, 0.0004% HWE, 626 Wt
Frequency 368.75 - 1200+ Gh/s, 0.0004% HWE, 639 Wt
Frequency 375 - 1220+ Gh/s, 647 Wt
Frequency 381.25 - 1250+ Gh/s, 0.0045 HWE, 657 Wt
Frequency 387.5 - 1270 Gh/s, 0.0093 HWE, 665 Wt
Frequency 393.75 - 1270+ Gh/s, 0.0156 HWE, 677 Wt (upd: 1288 Gh at PMpool.net, diff 4096)
Frequency 400 - 1300 Gh/s, 0.0258 HWE, 687 Wt

At frequency 400 and with PSU Corsair RM1000 80+ Gold power consumption at the wall is about 666 Wt (peak value), hashing speed is 1301 Gh/s (after 11+ hours of running), and HWE is 0.013%.

It's from my review.

pekatete

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Activity: 518

Merit: 500

Quote from: miguportugal on May 28, 2015, 05:26:26 PM

How i do this?

"If your PSU can step up the voltage, do it a touch, say 12.5v"

My psu is a EVGA 1000w

You'll have to look around to see if there is a hack for the PSU you are using, that is why I said "If your PSU can step up the voltage". I power my S5's using two 550W dell server PSU's (one for each blade) that I found a simple enough voltage hack HERE (but that's a story for another thread).

miguportugal

newbie

Activity: 42

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How i do this?

"If your PSU can step up the voltage, do it a touch, say 12.5v"

My psu is a EVGA 1000w

pekatete

hero member

Activity: 518

Merit: 500

1. Mind the ambient temp - as it gets warmer so will the rig's ability dissipate heat deprecate
2. Stick on a second fan - if you don't mind noise, stick on another S5 model fan (else an S3 fan with a blue wire hack!)
3. If your PSU can step up the voltage, do it a touch, say 12.5v - Note though that this will increase the temps & HW if no extra cooling is added.
4. OC to your heart's content - simply watch the HW ... anything below or a tad above 0.04 is OK (by me!).

Basically, aside from adequately powering an S5, its all about effective heat dissipation! Do note though that the better the heat dissipation, the better the rig will run and the more power it'll consume / demand!. Also look at this: https://bitcointalksearch.org/topic/antminer-s5-3d-printed-mods-1072176

philipma1957

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'The right to privacy matters'

with a second fan added I could push to 400 freq and get 1312 gh at about .51 watts a gh using an evga 1600 p2 psu.

Vorta

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Activity: 40

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Wasn't there such thread already?

Here's my OC analysis table which I'm filling in from time to time.

http://www.pohrani.com/f/0/od/3Uivo2kq/screenshot-2015-05-27-16.png

miguportugal

newbie

Activity: 42

Merit: 0

Peolple lets make a oc thread.

My ant S5 should arrive this week, i already have a fun to add to the miner, the psu will be a EVGA G1 1000w

Can you share your oc results with consumptions

Kind regards

Topic: Overclocking antminer S5 (Read 3268 times)