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demonmaestro
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October 26, 2013, 08:23:23 AM |
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damn a 65degree F room is cold.
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Mota
Legendary
 Offline
Activity: 804
Merit: 1002
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October 26, 2013, 09:35:19 AM |
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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
Legendary
Offline
Activity: 1036
Merit: 1000
/dev/null
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October 26, 2013, 09:42:23 AM |
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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)
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btc_uzr
Sr. Member
Offline
Activity: 476
Merit: 250
let's have some fun
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October 26, 2013, 11:45:07 AM |
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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  ? |
..and Thou shalt spread the coin in the name of cryptography for eternity
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Puppet
Legendary
Offline
Activity: 980
Merit: 1040
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October 26, 2013, 12:01:50 PM |
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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.
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waterboi92
Member
Offline
Activity: 82
Merit: 10
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October 26, 2013, 01:09:53 PM |
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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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if i've helped you, donations welcome: 1BwGnrqSjbfJ39mTNrvb257eUSuUP7Pfxh
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ImI
Legendary
Offline
Activity: 1946
Merit: 1019
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October 26, 2013, 01:39:37 PM |
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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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CYPER
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October 26, 2013, 01:50:00 PM |
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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  |
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CYPER
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October 26, 2013, 02:11:54 PM |
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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 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 |
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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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xyzzy099
Legendary
Offline
Activity: 1062
Merit: 1041
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October 26, 2013, 02:36:52 PM |
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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. |
Libertarians: Diligently plotting to take over the world and leave you alone.
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sbfree
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October 26, 2013, 02:37:30 PM |
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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 |
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KS
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October 26, 2013, 02:42:10 PM |
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Also..don't you find it interesting that Orama said after a chat with support (As he was sitting next to them) that Avenger was full of shit and didn't have an order? Me, I call that more than interesting. And less than honest.
I'm curious to know how orama could possibly know who Avenger is and find out whether he has or not an order. I also find it very much less than honest for the knc ppl to divulge their order book to non-employees and I find orama's witch hunt for Avenger puerile and fruitless. I'm sorry you're having it raw, but you chose to believe in phonies with no (successful) track record (unless you still believe that knc is orsoc and that having experience in design is that same as having experience in manufacturing). Can't say I didn't warn you. As for the cake, sure, I'll probably have some anyway. Maybe you should consider why I was asking for pictures? |
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Nemo1024
Legendary
Offline
Activity: 1680
Merit: 1014
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October 26, 2013, 02:42:34 PM |
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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. Can it be electrical interference from the fan's motor? They have quite a strong electromagnetic field when running. |
“Dark times lie ahead of us and there will be a time when we must choose between what is easy and what is right.”
“We are only as strong as we are united, as weak as we are divided.”
“It is important to fight and fight again, and keep fighting, for only then can evil be kept at bay, though never quite eradicated.”
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Cablez
Legendary
Offline
Activity: 1400
Merit: 1000
I owe my soul to the Bitcoin code...
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October 26, 2013, 02:59:47 PM |
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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.....
I am sorry, you are not going to get a reflow effect at the temperatures that this chip is running at. The max temp was stated at 105deg. but they hardly run anywhere near that. I do not doubt the empirical evidence seen, just the conclusion. |
Tired of substandard power distribution in your ASIC setup??? Chris' Custom Cablez will get you sorted out right! No job too hard so PM me for a quote
Check my products or ask a question here: https://bitcointalk.org/index.php?topic=74397.0
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sbfree
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October 26, 2013, 03:09:35 PM
Last edit: October 26, 2013, 03:33:52 PM by sbfree |
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nemo, I actually had added 2 high cfm 140mm computer case fans, 1 for each board/chip on my Saturn. And it cooled the chips...no noticeable gain, no noticeable decline in performance neither. But at the time I wasn't considering or thinking yet about hotter is better at the time, so I wasn't paying attention to that. All I noticed was that I added those 2 fans it did cool it, but no performance gain.
So my Saturn came with .95. I did all the suggested mods, not happy went to .96 and was somewhat satisfied, ended with .97 but has high error rate.
So I have gone direct with power supply to asic boards (lost the knc extenders). Supposedly less resistance blah blah....nothing. More cooling with a large fan over head facing down, nothing.
So then soy suggested .90 blah blah....I gave it a whirl (even though some early units had fried on this firmware) and whamo, LOW ERRORS
HIGH HASH RATE (both on cgminer and at the pool server)....I was happy...for like 20 minutes til it crashed.....worked my way all the way back to .97 (which at this point works the best for me) but hashes with a 20% error rate, which is bad.....
So I have kept a journal of all changes, times, stats (temp, wu, hw etc etc etc), and saw that .90 performed the best, and per bertmod, showed output volt slightly higher, and output current way higher (like 50A+, and yeah I was scared), and temps were definitely higher like 52c...
so then I think people on the board have been mentioning ball arrays, and shipping possibly harming chip and chips seating better with heat (put asic board in oven or something) blah blah then a few post about heat making it better....
So all I did was unplug the large fan, the 2 added high cfm case fans and turn off the a/c unit in the office, and the number I noticed the most was less errors....slowly down to like 14%- 15%, which is still high but better than 20%. Slightly higher chip temps, and even slight higher watt usage.....throughout most of the stable mining on this saturn (usually .94 and up) 1 chip with 100% cores enabled and the "problem" chip with 0 upto 10 cores disabled
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il_minatore
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October 26, 2013, 03:33:39 PM |
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Some tips to overclock?
thanks
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sbfree
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October 26, 2013, 03:38:07 PM |
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Some tips to overclock?
thanks
little that I know, you can only use firmware updates. I think I saw on irc some guys chatting away, or was it here, about having reversed engineered KNC's code.....there might be some real computer literates out there hacking away but nothing concrete yet.... |
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Crypto_Cumbrian
Member
Offline
Activity: 113
Merit: 10
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October 26, 2013, 03:45:48 PM |
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Jupiter FW 0.95
3 x Replacement boards.
After 24 Hour Burn in
Average 550Gh/s CGMiner and 550Gh/s at BTC Guild.
Less than 1 % HW errors.
All cores on and 100%.
Temps Range across 4 Asics 59.5 up to 65.5.
The suggestion that the ASIC's ball joints could get damaged due to Shipment with heat-sinks attached may have some merit.
My Under performing Jupiter is now 100%, Not changed firmware since RMA of the Faulty Boards (Faulty due to Hash Rate between 80 and 100Gh/s and a VRM not detected on 1 board).
Only other difference is I have applied my own Thermal paste.
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