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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3009290 times)
carlotech
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October 26, 2013, 06:21:48 AM
 #18501

thanks i will post my result soon... Grin

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https://www.kncminer.com/?resellerid=127
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JoelKatz
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October 26, 2013, 06:27:31 AM
 #18502

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?

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DimensionsOfHell
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October 26, 2013, 06:28:31 AM
 #18503

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.


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October 26, 2013, 06:32:29 AM
 #18504

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.

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sbfree
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October 26, 2013, 06:57:58 AM
 #18505


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....
ElGabo
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October 26, 2013, 08:11:19 AM
 #18506



LOL

 Smiley

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demonmaestro
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Mining for the hell of it.


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October 26, 2013, 08:15:53 AM
 #18507



LOL

 Smiley

Do you have that thing in a freezer or something?

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ElGabo
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October 26, 2013, 08:22:03 AM
 #18508

No-No

Some modified cooling.

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

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demonmaestro
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Mining for the hell of it.


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October 26, 2013, 08:23:23 AM
 #18509

damn a 65degree F room is cold.

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Mota
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October 26, 2013, 09:35:19 AM
 #18510

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.

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Xialla
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/dev/null


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October 26, 2013, 09:42:23 AM
 #18511

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)
btc_uzr
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let's have some fun


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October 26, 2013, 11:45:07 AM
 #18512

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 ?


!! File Complaints Against KnCMiner NOW !!
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October 26, 2013, 12:01:50 PM
 #18513

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.
waterboi92
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October 26, 2013, 01:09:53 PM
 #18514

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.

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Vyper
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October 26, 2013, 01:29:19 PM
 #18515

Please help me over here:
https://bitcointalk.org/index.php?topic=318747.0
The red light is lit and stays lit on the beaglebone board.

Kind regards Vyper
ImI
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October 26, 2013, 01:39:37 PM
 #18516

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.
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October 26, 2013, 01:50:00 PM
 #18517

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

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October 26, 2013, 02:11:54 PM
 #18518

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.

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FiatKiller
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October 26, 2013, 02:18:18 PM
 #18519

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

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October 26, 2013, 02:36:52 PM
 #18520


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.

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