Hacking The KNC Firmware: Overclocking - page 63.

sveetsnelda

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Quote from: sickpig on December 11, 2013, 05:06:13 PM

Thanks for the info!

I've hoped you have 8 VRMs.

Anybody out there that I've tweaked PLL/Clock on an october miner with 8VRMs?

You should be fine making changes using KNOWN good clock values (and knowing what you're doing). The VRMs will supply the power just fine. The problem is if you screw up and run too much current through those chips, you'll be in trouble. Those 8 VRMs will provide more power than that chip can handle.

glendall

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Buzz App - Spin wheel, farm rewards

Can you guys stop squeezing more hash out of your KNC's please? I'm getting really jealous...!

sickpig

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Quote from: ?? on ??

sorry for the delay...pretty busy at work right now

config: 201
4 VRMs

Thanks for the info!

I've hoped you have 8 VRMs.

Anybody out there that I've tweaked PLL/Clock on an october miner with 8VRMs?

CeeCee

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Activity: 237

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Quote from: ?? on ??

Yes it's an october unit. At the moment I don't know the power consumption as the miner is at a remote location. Rate now at 625Gh/s errors down to 0.9%.
I have used BFGminer to check frequency, temp, voltage, errors while hunting. But I prefer cgminer.

Will post config when I got time. But its pretty simple an not chip/die/core specific (though I had 1/2 die working at 1.2 GHz resulting in ~180 Gh/s for one ASIC....stable...but din't follow that road)

waiting for your config i will give it a try Wink

. 8 or 4 vrms?

sickpig

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Quote from: sudya_dred on December 11, 2013, 02:21:59 PM

And what speed on a pool so at least 1-3 hours?
My best 855-865 (1-3 hors) 98.1
When i try tuning different combination, i can see on cgiminer 1000-770, but pool in long time shows 845-855.

you're talking about an October Jupiter? if yes how many VRMs has your asic slot, 4 or 8?

sudya_dred

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Activity: 12

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And what speed on a pool so at least 1-3 hours?

My best 855-865 (1-3 hors) 98.1 October Saturn + 4 Upgrade (Water Cooled), 4 VRMs.
When i try tuning different combination, i can see on cgiminer 1000-770, but pool in long time shows 845-855.
Tested on btcguild.

sickpig

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Quote from: ElGabo on December 11, 2013, 01:37:32 PM

Quote from: sickpig on December 11, 2013, 12:48:52 PM

Quote from: ElGabo on December 11, 2013, 12:32:50 PM

4 vrms

But I've played with the he tune suite and voltage settings. They can run up to 58-59 amp with good cooling. I've used them for days just to try. They overheated at 63 amps...

BUT PLEASE DON'T DO THAT! You can cook your boards...

So if we could figure out some higher clock settings, give some power and proper cooling I think a better result can happen. But now I do't want to stop it for a day to play with it (and I have no time...).

Thanks for the info.

Let me ask one more thing: did you achieve aformentined hash rate only using the test suite or did you play also with PLL/clock settings?

The test suite is useless if you want to hunt some more ghs. I've tried a lot of combinations with spi freq, spi speed (do not touch the highest one!) and voltages. I have gone up to 58 amp and 55-60w each die and 1350w total for 6 boards. I'va only could raise about 4 ghs. Nothing.

I've only wrote this: sed sBD1BF1B /config/zzz.sh ; /config/zzz.sh restart

But this is Weng's tip not my, he figured it out. I don't have much time to play with the machine these days so I've tried it and it works. You could tune it from core to core but it's a lot of work..... Now I'm happy with it and I'll figure something out if I have some free time.

But an other important thing is the cooling. Always watch you temps!

More clock+more volt=more temp (cooked modules)

Some of my boards run a bit overcooled cause I've added high cfm fans to cool down when I played with higher voltages. My good temps was between 50-58C. It gave the best HW and hash.

Back in october when I got the machine I've cooled it down to 25-28C. I got only disabled cores, so overcooling is not option. But mine aren't liked 70C. (There were a lot of post in the Knc thread).

Thanks. Very helpful.
I'll give it a try as soon as I've enough time to monitor properly the machine after the changes.

ElGabo

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Quote from: joeventura on December 11, 2013, 01:44:44 PM

So all you do is issue this command?

sed sBD1BF1B /config/zzz.sh ; /config/zzz.sh restart

what does zzz.sh look like?

Yep.

Don't know. I don't have a lot of time in these days, so I've tried it, it works and thats all.

I'll check it at the weekend.

joeventura

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Activity: 854

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So all you do is issue this command?

sed sBD1BF1B /config/zzz.sh ; /config/zzz.sh restart

what does zzz.sh look like?

ElGabo

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Activity: 635

Merit: 500

Quote from: sickpig on December 11, 2013, 12:48:52 PM

Quote from: ElGabo on December 11, 2013, 12:32:50 PM

4 vrms

But I've played with the he tune suite and voltage settings. They can run up to 58-59 amp with good cooling. I've used them for days just to try. They overheated at 63 amps...

BUT PLEASE DON'T DO THAT! You can cook your boards...

So if we could figure out some higher clock settings, give some power and proper cooling I think a better result can happen. But now I do't want to stop it for a day to play with it (and I have no time...).

Thanks for the info.

Let me ask one more thing: did you achieve aformentined hash rate only using the test suite or did you play also with PLL/clock settings?

The test suite is useless if you want to hunt some more ghs. I've tried a lot of combinations with spi freq, spi speed (do not touch the highest one!) and voltages. I have gone up to 58 amp and 55-60w each die and 1350w total for 6 boards. I'va only could raise about 4 ghs. Nothing.

I've only wrote this: sed sBD1BF1B /config/zzz.sh ; /config/zzz.sh restart

But this is Weng's tip not my, he figured it out. I don't have much time to play with the machine these days so I've tried it and it works. You could tune it from core to core but it's a lot of work..... Now I'm happy with it and I'll figure something out if I have some free time.

But an other important thing is the cooling. Always watch you temps!

More clock+more volt=more temp (cooked modules)

Some of my boards run a bit overcooled cause I've added high cfm fans to cool down when I played with higher voltages. My good temps was between 50-58C. It gave the best HW and hash.

Back in october when I got the machine I've cooled it down to 25-28C. I got only disabled cores, so overcooling is not option. But mine aren't liked 70C. (There were a lot of post in the Knc thread).

sickpig

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Activity: 1260

Merit: 1008

Quote from: ElGabo on December 11, 2013, 12:32:50 PM

4 vrms

But I've played with the he tune suite and voltage settings. They can run up to 58-59 amp with good cooling. I've used them for days just to try. They overheated at 63 amps...

BUT PLEASE DON'T DO THAT! You can cook your boards...

So if we could figure out some higher clock settings, give some power and proper cooling I think a better result can happen. But now I do't want to stop it for a day to play with it (and I have no time...).

Thanks for the info.

Let me ask one more thing: did you achieve aformentined hash rate only using the test suite or did you play also with PLL/clock settings?

joeventura

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Activity: 854

Merit: 500

Please could someone just give us a consolidated set of instructions? Huh

ElGabo

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Activity: 635

Merit: 500

4 vrms

But I've played with the he tune suite and voltage settings. They can run up to 58-59 amp with good cooling. I've used them for days just to try. They overheated at 63 amps...

BUT PLEASE DON'T DO THAT! You can cook your boards...

So if we could figure out some higher clock settings, give some power and proper cooling I think a better result can happen. But now I do't want to stop it for a day to play with it (and I have no time...).

sickpig

legendary

Activity: 1260

Merit: 1008

Quote from: ElGabo on December 11, 2013, 11:55:38 AM

Thanks for the help.

I got this and I'm happy (with 6 modules):

http://i.imgur.com/Nk2t1a1.jpg

Very good.

What's your asic board type? 8 or 4 VRMs?

ElGabo

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Activity: 635

Merit: 500

Thanks for the help.

I got this and I'm happy (with 6 modules):

sickpig

legendary

Activity: 1260

Merit: 1008

Quote from: ?? on ??

Yes it's an october unit. At the moment I don't know the power consumption as the miner is at a remote location. Rate now at 625Gh/s errors down to 0.9%.
I have used BFGminer to check frequency, temp, voltage, errors while hunting. But I prefer cgminer.

Will post config when I got time. But its pretty simple an not chip/die/core specific (though I had 1/2 die working at 1.2 GHz resulting in ~180 Gh/s for one ASIC....stable...but din't follow that road)

great work here guys, kudos to all.

@gravito: Do you have an 8 VRMs october jup 8 or one with 4 VRMs?

CeeCee

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Activity: 237

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Quote from: ?? on ??

got my unit stable at ~620Gh/s (still rising after 4h). Had 660/700 almost stable but the temps are pretty high at the current location, so I had to abort. Might be solved by tweaking voltage settings though and repositioning the fans to cool the vrms.

on an october unit Shocked

?

joeventura

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Activity: 854

Merit: 500

How about a step by step with a KNC unit running 0.99 tuning?

ultrix

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Activity: 125

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Quote from: ?? on ??

got my unit stable at ~620Gh/s (still rising after 4h). Had 660/700 almost stable but the temps are pretty high at the current location, so I had to abort. Might be solved by tweaking voltage settings though and repositioning the fans to cool the vrms.

What is the difference in power draw you're seeing at 620 vs stock 550?

gateway

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Activity: 552

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Quote from: ?? on ??

got my unit stable at ~620Gh/s (still rising after 4h). Had 660/700 almost stable but the temps are pretty high at the current location, so I had to abort. Might be solved by tweaking voltage settings though and repositioning the fans to cool the vrms.

You should use bfgminer you can then easily see which chips are doing what hash rate instead of just a total amount..

What values or script did you end up using?

Topic: Hacking The KNC Firmware: Overclocking - page 63. (Read 144380 times)