New rig, high temperatures
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Alright, thanks, RD :)
BUT! I think I just fried my 7990!
I just tried some settings out that I found [url=https://litecointalk.org/index.php?topic=672.85;wap2]here[/url] from the user “Pagan”.
The 7970 had the same speeds, but my 7990 went to more than 700KH/s on each core until the machine turned off after a about 30 seconds.This is what I put the card through:
cgminer.exe --scrypt -o stratum+tcp://pool.d2.cc:3333 -u X -p X --intensity 13 --shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256.When I started the machine again, and started CGminer with my regular configuration, the GPU’s on the 7990 weren’t running. I then shut down the machine and removed the 7970 to focus on the 7990. When I try mining with my old configuration, it hangs after a while. I guess I must have fried it already :o
I saw no smoke, but there was a faint smell of burnt electronics.Oh the humanity!
What does -w do? I can’t find it in the readme.txt and guess it much be an abbreviation that the program still recognises. Was this what has affected my card perhaps?
I feel stupid…
EDIT: I guess it must be this one (found in the readme.txt):
[i]–worksize|-w Override detected optimal worksize - one value or comma separated list[/i]
But I still don’t understand what it does? -
Update!
Things are going better. Nothing seems to be fried anyway. Maybe it just needed to have the power disconnected for some time to “go back to zero”.
I did some moving around and right now I’m getting around 1900KH/s from those two cards. The hottest one is running at 90 - 92C.
I mounted three 80mm fans blowing right at the three fans of the 7990, which helps it move a lot more air through the vents.
I’m considering whether it might be safe to put it on my balcony during winter, and I would like to hear your opinions.
The balcony is closed off with a bunch of big windows. The windows keep out all rain and snow, but some wind gets through, so the air is always moving a bit. Because of the moving air, water doesn’t condense out there, so I’m thinking that it should be safe, and the GPU’s would have an easier time breathing. During winter, the temperature might go below zero, but as far as I know, most computer parts are designed to be able to handle that. Especially since air humidity goes down as the temperatures drop.I would really appreciate some views on the matter as I have no previous experiences with this and might be overlooking something important.
Thanks for helping out, guys! :)
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You thought not to make liquid cooling? ::)
Suppose we remove coolers manufactures, insert copper rods and put these in oil or water, inverted plates and rods in cooling tanks. I’ve been immersed in oil systems, but I think the water or coolant is better …
I am seriously thinking about it for my mining equipment… ;)(sorry, I do not speak English, I use translator) ;)
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You’re describing improperly seated/installed/sized heat sinks. Have you considered aftermarket cooling products, or maybe just re-seating the existing one with some new thermal paste?
There’s plenty of guides online on how to (and more importantly how NOT to) apply thermal paste correctly.
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[quote name=“Ernesto” post=“40345” timestamp=“1386290978”]
You thought not to make liquid cooling? ::)
[/quote]
I thought about it, yes. But I prefer not to do that. Liquid cooling is a whole new thing to learn and right now I have enough to learn already. But thanks for the suggestion :)[quote author=Kevlar link=topic=5398.msg40349#msg40349 date=1386292014]
You’re describing improperly seated/installed/sized heat sinks. Have you considered aftermarket cooling products, or maybe just re-seating the existing one with some new thermal paste?There’s plenty of guides online on how to (and more importantly how NOT to) apply thermal paste correctly.
[/quote]You are absolutely right. I should have thought about that. I used to repair computers for a living, so I know how bad factories can be at using thermal paste. I will try that.
But still, I am interested to hear what you all think about putting the miner in the balcony. On top of lowering the temperature, I would also get the noise out of the living room.
The thing is, I am sharing a large apartment with 3 study buddies. They agreed that it would be okay for me to keep the miner in the living room, but the noise caught us all by surprise. I know the noise level would go down a bit with better thermal conductivity between heatsinks and hardware, but I think it would still be annoying to have next to you while watching TV.
So yeah… how about that balcony? :P
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Thermal expansion is not your friend I’m afraid. When components heat up, they expand. When the cool down, they shrink. Besides humidity, which will corrode your metal, there’s thermal expansion which can wreak havoc on your connectors and cooling components, which could separate from the components when they shrink, depending on how they’re mounted. Now this may not actually be a problem… or it may kill your machine. It’s hard to know ahead of time.
Your goal should be to reach a reasonable operating temperature, and keep it there. Swinging into the negatives and then returning isn’t going to make anything happy I’m afraid.
It’s probably better to get quieter fans.
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Thanks for the thorough reply, Kevlar.
And I see your point and I won’t put it on the balcony. I will find some good fans and get some good thermal paste instead and see what I can do with that.
Maybe I will do a new thread on the subject. I guess others could be interested in quieting their monsters as well.
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:o
[url=http://dailydominoe.blogspot.com.ar/2008/05/its-allive.html]http://dailydominoe.blogspot.com.ar/2008/05/its-allive.html[/url]
:o :o
Saying this?I think it would need more cooling for mining-- ::)
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That looks very cool, Ernesto. :)
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[quote name=“HizzleFizzle” post=“40377” timestamp=“1386299916”]
That looks very cool, Ernesto. :)
[/quote]And very quiet… ;D
more…
[url=http://www.pugetsystems.com/mineral-oil-pc.php]http://www.pugetsystems.com/mineral-oil-pc.php[/url]
:P
but my idea is to just immerse only graphics cards…
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;D
An idea to add to the cooling.
Add in the pool streamer copper pipe, leading some external water cooled radiator, it may be one of cars …
In that way have an efficient heat exchanger.
[img]http://static2.milkcapmania.co.uk/Img/Tazo/Chile/Disney/300DPI/33-Giro-Sin-Tornillos.png[/img]
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That looks very cool! I will read through their experiences and consider building something like that :)
Good idea to use a car radiator. That will be able to move a lot of heat!
Thanks for the information :)
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Collaborate with us with our ideas are on track. ;D
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[quote name=“HizzleFizzle” post=“39793” timestamp=“1386203725”]
GPU 0 (7970): 92.0C, 538Kh/s
GPU 1 (7990): 87.0C, 517Kh/s
GPU 2 (7990): 96.0C, 517Kh/sI am a bit worried to go to bed with it on as the temps are still slowly climbing. I’m thinking, next step would be to start reading up on lowering the voltage a bit. Do you agree? Maybe there are other suggestions?
The OS is Windows 7 and Catalyst 13.9 is installed.
The setup of CGminer is simple as I’m still getting acquainted with it. There is nothing special added and I am running intensity 13 on all three GPU’s.Any help would be much appreciated :)
[/quote]Hello
Just registered to comment on this as I have a Club 3D 7990 bough second hand which had the same symptoms. I thought about the process for a moment, then decided to disassemble the card and change the heat transfer paste. After that the GPU:s run at 70-80 celsius. The taking apart was surprisingly easy to do.
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[quote name=“keshuker” post=“50689” timestamp=“1389182007”]
[quote author=HizzleFizzle link=topic=5398.msg39793#msg39793 date=1386203725]GPU 0 (7970): 92.0C, 538Kh/s
GPU 1 (7990): 87.0C, 517Kh/s
GPU 2 (7990): 96.0C, 517Kh/sI am a bit worried to go to bed with it on as the temps are still slowly climbing. I’m thinking, next step would be to start reading up on lowering the voltage a bit. Do you agree? Maybe there are other suggestions?
The OS is Windows 7 and Catalyst 13.9 is installed.
The setup of CGminer is simple as I’m still getting acquainted with it. There is nothing special added and I am running intensity 13 on all three GPU’s.Any help would be much appreciated :)
[/quote]Hello
Just registered to comment on this as I have a Club 3D 7990 bough second hand which had the same symptoms. I thought about the process for a moment, then decided to disassemble the card and change the heat transfer paste. After that the GPU:s run at 70-80 celsius. The taking apart was surprisingly easy to do.
[/quote]Hey Keshuker. Thanks for registering to tell me that! :)
I took the ASUS HD 7990 apart yesterday and you were absolutely right. There was way too much thermal paste… and of poor quality.
I gave it some Arctic Silver and replaced two of the conductive pads which broke in the process. I didn’t get as big a change as you did, but it did save me about 3 degrees, so it’s better than nothing :)I’ve actually ordered water cooling for it, but the water blocks for 7990 have been out of stock for a long time. But as long as it gets here before summer, I think I will be okay :)
Thanks again, for taking the time!