Swedish ASIC miner company kncminer.com - page 1212.

sbfree

sr. member

Activity: 336

Merit: 250

Quote from: Puppet on October 26, 2013, 07:01:50 AM

this "higher temp = higher performance" doesnt make a lot of sense. Design aside, there are only two factors affecting performance:
- clockspeed. Is this variable on KnC? Can it be measured?
- number of functional cores/ % of HW errors. Does this go down as temps go up?

Thats it. The rest is statistical noise.

well believe it or not, my Saturn actually runs better warmer....maybe with heat things expand, and as some have said in earlier posting, maybe that help "seat" chip better, maybe heat make solder melt/soften and chip makes better contact.....

all I know is that slightly warmer has actually produced slightly better numbers.....fwiw

xyzzy099

legendary

Activity: 1066

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Quote from: FiatKiller on October 26, 2013, 09:18:18 AM

Also, how can I change the background color in putty or Linux?

Click on the icon of two connected computers in the upper left corner of the Putty window, and select 'Change Settings' from them menu. In the configuration dialog, select 'Window->Colors', and change any of the colors as you will.

FiatKiller

sr. member

Activity: 378

Merit: 250

Anyone screwed around with the default scantime of 60 seconds and expiry of 120 and had any luck? I know that's a huge factor with new coins and the block times are getting quicker and quicker with all the hashpower coming online.

Also, how can I change the background color in putty or Linux?

thanks

CYPER

hero member

Activity: 812

Merit: 502

Quote from: ?? on ??

Quote from: CYPER on October 26, 2013, 08:50:00 AM

I asked Liam over the phone and he told me max temp for the ASIC chips is 105C, so you are far from the point where they are overheating Wink

Did they offer any guidance on where to measure the ASIC temperature? Case to Junction C/W data? Mention if the 105C was case, junction, or test point temperature? Basically, did they provide any other useful information, or is that literally all he said? Did they provide any guidance on VRM (DC/DC) temperature testing data - I suspect they really don't have a lot more to go on than we do, due to a lack of formal testing procedure, and these are intended as relatively short-term operating devices. AFAIK, there is no ASIC thermal sensor available on-board or on-die, unless I missed something, I'd love to know for sure.

He just said what I wrote. Nothing else in regards to temperatures.

CYPER

hero member

Activity: 812

Merit: 502

I asked Liam over the phone and he told me max temp for the ASIC chips is 105C, so you are far from the point where they are overheating Wink

ImI

legendary

Activity: 1946

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Quote from: Puppet on October 26, 2013, 07:01:50 AM

this "higher temp = higher performance" doesnt make a lot of sense. Design aside, there are only two factors affecting performance:
- clockspeed. Is this variable on KnC? Can it be measured?
- number of functional cores/ % of HW errors. Does this go down as temps go up?

Thats it. The rest is statistical noise.

sense or not. i have one jupiter that reacts in the same way. additional cooling with a big box-fan on top of the miner = cgminer crashes every 5 min. without box-fan = cgminer stable / higher avg GH.

Vyper

newbie

Activity: 54

Merit: 0

Please help me over here:
https://bitcointalksearch.org/topic/knc-asic-red-light-318747
The red light is lit and stays lit on the beaglebone board.

Kind regards Vyper

waterboi92

member

Activity: 82

Merit: 10

hey guys,

my jupiter is reporting HIGHER temps after i switched the heat sink stock fans for cooler master jetglo fans (95CFM). any idea why this is happening?

any insight is greatly appreciated! thanks.

Puppet

legendary

Activity: 980

Merit: 1040

this "higher temp = higher performance" doesnt make a lot of sense. Design aside, there are only two factors affecting performance:
- clockspeed. Is this variable on KnC? Can it be measured?
- number of functional cores/ % of HW errors. Does this go down as temps go up?

Thats it. The rest is statistical noise.

btc_uzr

sr. member

Activity: 476

Merit: 250

let's have some fun

this is getting weird.....it doesn't matter how old are you, there's always sth not fitting into the picture of reality as you have perceived it until now
you put more heat onto those chips and get higher GH/s rate ?!

...and it is not recommended in intention to blow competition out of business Tongue

?

Xialla

legendary

Activity: 1036

Merit: 1001

/dev/null

yeah, indeed. ~60°C is very common temp for cooled chip running at 100% load..

btw downgraded to .96 because every ~12 hours after last reboot with .97, hashing speed drops from ~547Gh to ~450Gh. (.96 running stable ~540Gh)

Mota

legendary

Activity: 804

Merit: 1002

I don't think 60°C are a problem. All my units run between 53 and 60°C with all fans on and standing vertical so that the warm air does not mix immediately with the cold air. And with a window over them so that fresh cool autumn air can come in. That said, 60° is also the temp my normal cpu runs with. I think they can withstand 73+°C without problems. My PS3 runs way hotter than that and is still working after all those YEARS. I do not expect my miner to run that long.

demonmaestro

hero member

Activity: 574

Merit: 500

Mining for the hell of it.

damn a 65degree F room is cold.

ElGabo

hero member

Activity: 635

Merit: 500

No-No

Some modified cooling.

And about 18-19c room temp, closed box.

demonmaestro

hero member

Activity: 574

Merit: 500

Mining for the hell of it.

Quote from: ElGabo on October 26, 2013, 03:11:19 AM

LOL

Do you have that thing in a freezer or something?

ElGabo

hero member

Activity: 635

Merit: 500

LOL

sbfree

sr. member

Activity: 336

Merit: 250

Quote from: Phoenix1969 on October 25, 2013, 11:15:44 PM

BAM... slow one still not quite done climbing, but Ewikis a happy camper now!
all 0.97, and no doggone fans... not even the case fans, only the heatsink fans!

ok, then, I guess those will go next....

JoelKatz

legendary

Activity: 1596

Merit: 1012

Democracy is vulnerable to a 51% attack.

If the output voltage is correct and the current is low, it's not the VRM's fault. Check your VRM's for any physical damage. Check to make sure the plastic cover was removed from your heat sinks before they were mounted to the ASIC. What baffles me about your numbers is that your output voltages are so high, and evenly so across the board. They should be around 0.75V or so.

DimensionsOfHell

full member

Activity: 346

Merit: 100

An update on my Saturn:

My average has settled around 142GH/s at the pool.

I've also noticed, possibly, why I am getting such shitty rates;

1. I have one bad VRM on the first board, and some really shitty cores.

2. On the second board, I have a bad VRM, and a non-functioning VRM

So out of two boards for a Saturn, I've gotten the shitty luck of receiving two shitty boards. So wonderful...

KnC's quality control people should be fired, that is, if they even have any. So this grounds my theory that they are no longer bothering to test units. They are just churning them out and sending them as they are, probably just to clear their back log, as they have already F**ked so many people over.

I'm going to stop rambling now; I'm just too pissed off.

JoelKatz

legendary

Activity: 1596

Merit: 1012

Democracy is vulnerable to a 51% attack.

Because the ASICs are built on similar technology to CPUs and GPUs, it's reasonable to assume the range of permissible temperatures is about the same. The leaves two unknowns:

1) What temperature is the miner reporting exactly? Is it die temperature? Heat spreader temperature? Board temperature?

2) Should we worry about the VRMs overheating even if the temperature reported by the miner is in the safe range?

Topic: Swedish ASIC miner company kncminer.com - page 1212. (Read 3049524 times)