Hacking The KNC Firmware: Overclocking - page 49.

ncs0ne

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software developer

Quote from: pedrosoft on January 10, 2014, 06:57:56 AM

Quote from: jelin1984 on January 10, 2014, 06:31:44 AM

to save changes:

then hit:
esc
:
wq

i do that but i can to saving the setting
why?

I have the same problem from days ! :/

Then try it like this:

Code:

# download original file into current working dir
scp root@:/etc/init.d/cgminer.sh ./

# now open the file with your preferred text-editor
# and do the changes
...

#now upload it into /config (the only persistent dir) on the miner
scp cgminer.sh /config/overclocked.sh

#maybe you need to set the executable flag, not sure
ssh root@ 'chmod +x /config/overclocked.sh'

# restart cgminer
ssh root@ '/config/overclocked.sh restart'

*for win you need putty/winscp

pedrosoft

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Quote from: jelin1984 on January 10, 2014, 06:31:44 AM

to save changes:

then hit:
esc
:
wq

i do that but i can to saving the setting
why?

I have the same problem from days ! :/

jelin1984

legendary

Activity: 2408

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to save changes:

then hit:
esc
:
wq

i do that but i can to saving the setting
why?

idee2013

sr. member

Activity: 407

Merit: 250

Quote from: jelin1984 on January 10, 2014, 05:27:58 AM

how i can do that? Huh

\
Then with Putty SSH into your miner

login with your root ID
and your password

i go at putty login as admin
then put the password
but access denied

why? Huh

?

because you are not the admin...you have to login with root. KNC has the admin data

jelin1984

legendary

Activity: 2408

Merit: 1004

how i can do that? Huh

\
Then with Putty SSH into your miner

login with your root ID
and your password

i go at putty login as admin
then put the password
but access denied

why? Huh

?

idee2013

sr. member

Activity: 407

Merit: 250

Quote from: jbah01 on December 30, 2013, 03:38:25 PM

Just to share my settings/performance:
- October unit (Asic 1 = 4 VRM, other 3 are 8 VRM but only 4 active)
- Firmware 0.99-tune
- Clocksetting on 231, no other firmware changes.
- Harware mod: Lowered the Asicboard-fans (more airflow over the board), added 2 fans at the outlet (so now push + pull) and slightly lowered fan speed to reduce the noise (80%).

Images
Status page --> 676 GH/s / 9131 WU
Advanced page --> 2.5V SPI and 256kHz frequency, slightly modded volts (higher, as required for the increased clock), not completely fine-tuned.
CGminer --> Error rate used to be 3%@560GH/s, since I lowered the volts a bit after the initial increase this increased to just below 4%. Fine with me as it lowered the temps 5-10 degrees an decreased power to 'around' 40 W per DC instead of closer to 50 W.
Pool stat --> 650ghs average
Power consumption in bertmod used to be 453 W, now it is 651 W (43% increase in consumption for 18/19% performance increase). With voltage finetuning the power consumption should be able to come down a bit, now it is all pretty much on the safe side (safe as in: higher voltage as required to avoid that cores get shut down).

Have done exaktly the same (231) with my october jupiter (3x8vrms and 1x4vrms), but gave 2,5V SPI and 256000hz and gave more volts at the asics.
I am reaching now about 670 Gh/s at Eligius pool 12hours avg. Power consumption now is 743 Watts (50-55amps per asic). Before i had 555Gh/s avg and about 593 Watts.
PSU PC and Cooling MK 3 1200 (platinum).

merv77

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Activity: 574

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1.21 GIGA WATTS

tolip_wen

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Activity: 386

Merit: 250

Quote from: CYPER on January 08, 2014, 06:01:37 PM

Quote from: tolip_wen on January 08, 2014, 04:59:53 PM

I have one die running 950MHz (251) for over a month.
Most others are way slower though.

Amps and average temp for that die?

the 950MHz die is pulling 59A 47W
(those are the highest readings I ever see so slightly lower average)

I don't run the whole ASIC at that speed just one die.
The neighbors are ~50A 40W (average but all similar)
Directly adjacent are @ 39W and opposite corner is @ 41W
41.5W average per die for the ASIC
My personal do not exceed is less than 45W per die AVERAGE per ASIC
I'm still under 190W at the wall per ASIC (platinum PSU's at the sweet spot of 50%)
1.2W at the wall per Gh/s

Temps is a guesstimate at best.
IR temp from backside of running module is 60C for that die.
IR temp for that VRM is 73C measured on the bottom of the PCB!
There is a part in the VRM that is much hotter!
Temps were cross checked with thermocouple and measured at location of many via's conducting heat thru PCB

The watercooling system runs about 30C (I trade some temp for lower noise)
I have parts to improve the delta C but don't want the downtime yet as I don't see much to gain from current settings based on experience to date.

The LM75 on the PCB says ~ 50-55C depending on draftiness in cold house.

as usual
YMMV

elasticband

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On a merc I am currently running 900mhz - 231 with very little problem

tolip_wen

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Quote from: capa on January 09, 2014, 06:03:59 AM

I've asked EK-Waterblocks http://www.ekwb.com/ to design a waterblock for the KnC hardware, my aim is for a higher stable overclock;

http://thinkcell.ekwb.com/idea/knc-miner-waterblock/

As you can see from the thread the KnC response has not been positive so far. Cry

I'd like to know anyone else is interested in this small project,

Target = 1Th 6 module KnC

I like the way you think, but think it all the way through.

Spending lots on cooling at this point in time may not be worthwhile.
RAM blocks are expensive and you need 2 per module.

Large air cooled aluminum heatsinks might be more cost effective.

FWIW: It cost me lots more than the cost of waterblocks for a WC system.
I justified it, you may also, just please make the decision based on all the facts and set expectations accordingly.

Fun _IS_ a good reason!

YMMV

CYPER

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Quote from: elasticband on January 09, 2014, 02:41:52 PM

Quote from: CYPER on January 09, 2014, 02:32:44 PM

642GH/s with 8VRMs here.
Been running like that for almost 2 weeks.

how? I was a bit premature, running fine for about 10mins then just stared getting HW increase and cores shutting off.
Only Running 1F1 - 800MHZ

Sheer luck - that is my best performing October Jupiter.
Using only 211, so 850Mhz.
HW errors are really low too: 0.56%

elasticband

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Quote from: CYPER on January 09, 2014, 02:32:44 PM

642GH/s with 8VRMs here.
Been running like that for almost 2 weeks.

how? I was a bit premature, running fine for about 10mins then just stared getting HW increase and cores shutting off.
Only Running 1F1 - 800MHZ

CYPER

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642GH/s with 8VRMs here.
Been running like that for almost 2 weeks.

elasticband

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got my 8VRM runnign stable around 600 GH Grin

mruiter

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Quote from: sickpig on January 09, 2014, 01:44:53 PM

No, at least in my expirience.

Every time I've increased voltage I've had higher Amps and Watts.

One quest though: how did you check hashrate at die level?

Bfgminer had the average of the whole board
Just math - the half of the default / 2 is the single die

elasticband

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any success doing 8 VRM's?

sickpig

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No, at least in my expirience.

Every time I've increased voltage I've had higher Amps and Watts.

One quest though: how did you check hashrate at die level?

mruiter

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Activity: 281

Merit: 250

I Just let 2 dies of my coolest boards run on 251
They survived the first day. Put them back for the night as i'm not near the miner at that time.

Amps on the VRM where 65 an 64
Temp was 76 degrees

Speed 45Ghash on the dies i enabled.

Tomorrow i will try to lower volt.

But correct me if i'm wrong.... The chips need a certain amount of watts to opperate.

If i lower the volt the amps wil go up.
If i upper the volts the amps wil go down.

Anyone tested and can confirm this ?

CYPER

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Someone might be interested in my communication with CoolerMaster:

Question:

Quote

Maximum safe temperature for PCI-E cables: I have a Cooler Master V850 to power a specific hardware that is using 4
PCI-E cables with a total DC power consumption of around 700W.
So each PCI-E cable is drawing around 175W or a current of 14.5А.
My main concern is that the cables near the PSU reach a temperature of
45-46 degrees. Then again the markings on the cables says 80 degrees,
which I assume is the maximum safe temperature?

So is a temperature of 46 degrees on the outside of the hottest cable safe?

Thank you.

Answer:

Quote

Apologies for the late reply.
That is correct, all cables are rated 80 degrees Celsius for testing. You can withstand temparature up to 80 degrees Celsius with any issues.

Kind regards,

Michiel Bos

Cablez

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I owe my soul to the Bitcoin code...

For those that are unsure of their way around vi as they are new to it here are the basic commands. http://www.cs.colostate.edu/helpdocs/vi.html

It was a help to me as I had only used nano prior.

Topic: Hacking The KNC Firmware: Overclocking - page 49. (Read 144343 times)