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desired_username
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May 09, 2013, 08:59:18 PM |
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3rd attempt at mounting to reduce temps, ready for the new fans. This seems to be the approach most are taking, flat with a 1" gap underneath. This will be ventilated with the old 120mms once the new ones arrived.
Did you read this? https://docs.google.com/document/d/1VMO3VfIBy3KIwUaaQ8XhKrSVEbXeeMEqsVhhk6Bz9io/edit?pli=1quote: "Please make it vertically placed if you could. The chips are packaged via QFN, but not all the heat are absorbed by the PCB. The back side will also become hot. And if you have no mechanical setting to lift it and have to lay it on the supporting table, please make sure that there are no heat isolation material under it." Why did no one read what I actually posted :/ "flat with a 1" gap underneath." The gap still traps the hot air without any ventillation. It's easy to mount it on it's edge (again, check lightbox's comments) and you can easily create an air channel, using cardboard or plastic. here's a crappy sketch: https://dl.dropboxusercontent.com/u/8310142/cooling.png |
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dogie
Legendary
 Offline
Activity: 1666
Merit: 1185
dogiecoin.com
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May 09, 2013, 09:24:53 PM |
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3rd attempt at mounting to reduce temps, ready for the new fans. This seems to be the approach most are taking, flat with a 1" gap underneath. This will be ventilated with the old 120mms once the new ones arrived.
Did you read this? https://docs.google.com/document/d/1VMO3VfIBy3KIwUaaQ8XhKrSVEbXeeMEqsVhhk6Bz9io/edit?pli=1quote: "Please make it vertically placed if you could. The chips are packaged via QFN, but not all the heat are absorbed by the PCB. The back side will also become hot. And if you have no mechanical setting to lift it and have to lay it on the supporting table, please make sure that there are no heat isolation material under it." Why did no one read what I actually posted :/ "flat with a 1" gap underneath." The gap still traps the hot air without any ventillation. It's easy to mount it on it's edge (again, check lightbox's comments) and you can easily create an air channel, using cardboard or plastic. here's a crappy sketch: https://dl.dropboxusercontent.com/u/8310142/cooling.png That was my initial config and it wasn't even close to sufficient because of the inability to force the fans onto the heatsinks. There is actually quite strong airflow underneath and the mini fans on the side blow under there. Because its quite a confined area a small amount of conventional airflow pushes all the way through as there is no where for the pressure to escape. I can feel the flow underneath and its as strong as when it was standing. I'll check underneath temps and temps of the box walls etc after 4 hours of uptime. |
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desired_username
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May 09, 2013, 09:42:37 PM |
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3rd attempt at mounting to reduce temps, ready for the new fans. This seems to be the approach most are taking, flat with a 1" gap underneath. This will be ventilated with the old 120mms once the new ones arrived.
Did you read this? https://docs.google.com/document/d/1VMO3VfIBy3KIwUaaQ8XhKrSVEbXeeMEqsVhhk6Bz9io/edit?pli=1quote: "Please make it vertically placed if you could. The chips are packaged via QFN, but not all the heat are absorbed by the PCB. The back side will also become hot. And if you have no mechanical setting to lift it and have to lay it on the supporting table, please make sure that there are no heat isolation material under it." Why did no one read what I actually posted :/ "flat with a 1" gap underneath." The gap still traps the hot air without any ventillation. It's easy to mount it on it's edge (again, check lightbox's comments) and you can easily create an air channel, using cardboard or plastic. here's a crappy sketch: https://dl.dropboxusercontent.com/u/8310142/cooling.png That was my initial config and it wasn't even close to sufficient because of the inability to force the fans onto the heatsinks. There is actually quite strong airflow underneath and the mini fans on the side blow under there. Because its quite a confined area a small amount of conventional airflow pushes all the way through as there is no where for the pressure to escape. I can feel the flow underneath and its as strong as when it was standing. I'll check underneath temps and temps of the box walls etc after 4 hours of uptime. I hope you get it right happy mining |
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dogie
Legendary
Offline
Activity: 1666
Merit: 1185
dogiecoin.com
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May 09, 2013, 09:45:37 PM |
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I hope you get it right
happy mining
Don't get me wrong guys, I do appreciate your input and help - its just I'm the only one in my room groping these particular boards with this particular airflow. Finally got round to setting up a stratum proxy (that was easy) to slush. Tried mining_proxy.exe -o stratum.btcguild.com -p 3333 to btcguild but it spams errors. I can't make sense of them but either way it doesn't send info to btcguild. |
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nottm28
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May 09, 2013, 10:57:58 PM |
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I hope you get it right
happy mining
Don't get me wrong guys, I do appreciate your input and help - its just I'm the only one in my room groping these particular boards with this particular airflow. Finally got round to setting up a stratum proxy (that was easy) to slush. Tried mining_proxy.exe -o stratum.btcguild.com -p 3333 to btcguild but it spams errors. I can't make sense of them but either way it doesn't send info to btcguild. Dogie - I take my epic fail back (just humor) - but it just does look bad my friend - I'd cut the front (and back) off these drawers off and have a BIG fan blowing at them from the front. On the other hand it does sound like you have put thought into this and - good luck - let us know how you get on... |
donations not accepted
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Pinwheel
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May 10, 2013, 01:18:05 AM |
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best rack in this tread but in my experience having blowers blowing air directly on heat-sink is must. Especially if room is hot and blade run on HIGH clock. |
Tom Waits: We should just start as soon as possible cause we might catch a rabbit before we have our pants on. (Juxtapoz)
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Tulkas
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May 10, 2013, 05:39:26 PM |
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Hello! My "setup" :   I'm not confident to run those beauties in HIGH clock because I'm not sure what friedcat means by "if you are having heat problems". Does anyone knows what configures a heat problem? What is recommended operating temperature? Where is the recommended place to measure temperature? Radiator? PCB? On top of hashing chip?[]'s |
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dogie
Legendary
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Activity: 1666
Merit: 1185
dogiecoin.com
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May 10, 2013, 05:53:56 PM |
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I'm not confident to run those beauties in HIGH clock because I'm not sure what friedcat means by "if you are having heat problems".
Does anyone knows what configures a heat problem?
What is recommended operating temperature?
Where is the recommended place to measure temperature? Radiator? PCB? On top of hashing chip?
Run them in high. If they get too hot, they'll restart and go into low clocks - that's your warning. Too hot means the boards are resetting, although arguably we'd want these boards as close to room temp as possible. I'd say radiator is the only place you can really measure. How have you mounted the mini fans onto the heatsinks? |
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drlatino999
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May 10, 2013, 05:56:54 PM |
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What Efficiency are you guys receiving? I'm currently at 92.49% and the highest I've seen it at was 94%. Any tips to raise it up?
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Sappers clear the way
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Caesium
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May 10, 2013, 05:59:33 PM |
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Which pool/setup?
I see 99% efficiency with a local stratum proxy on 50BTC, and 97% with the same on EMC. I suspect this an EU/US difference, there's a bit more latency to EMC from me.
Not extensively tested other pools yet. Have you experimented with a few, do you get 92% on a few different ones? I think a local stratum proxy is probably the single biggest step though, that will help massively. I tried them direct to a getwork supporting pool for a bit and was in the 70% efficiency range, terrible.
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candoo
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May 10, 2013, 06:00:18 PM |
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What Efficiency are you guys receiving? I'm currently at 92.49% and the highest I've seen it at was 94%. Any tips to raise it up?
Total MHS: 12528 Received: 0000035408 Accepted: 0000035260 Per Minute: 171.15 Efficiency: 099.58% Up Time: 0d,03h,26m,01s |
Einer trage des andern Last, so werdet ihr das Gesetz Christi erfüllen.
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drlatino999
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May 10, 2013, 06:15:46 PM |
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Which pool/setup?
Slush, using 2 local stratum proxies to balance out. I'm located in TX. |
Sappers clear the way
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mc_lovin
Legendary
Offline
Activity: 1190
Merit: 1000
www.bitcointrading.com
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May 10, 2013, 06:20:39 PM |
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What Efficiency are you guys receiving? I'm currently at 92.49% and the highest I've seen it at was 94%. Any tips to raise it up?
Total MHS: 12528 Received: 0000035408 Accepted: 0000035260 Per Minute: 171.15 Efficiency: 099.58% Up Time: 0d,03h,26m,01s Mine on slush for better efficiency. |
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drlatino999
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May 10, 2013, 06:27:51 PM |
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Mine on slush for better efficiency.
I have been. Total MHS: 11182 Received: 0000037157 Accepted: 0000034475 Per Minute: 153.00 Efficiency: 092.78% Up Time: 0d,03h,45m,19s |
Sappers clear the way
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candoo
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May 10, 2013, 06:28:43 PM |
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Which pool/setup?
Slush, using 2 local stratum proxies to balance out. I'm located in TX. How do you use 2 stratum proxys? Can they both listen at the same port? |
Einer trage des andern Last, so werdet ihr das Gesetz Christi erfüllen.
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drlatino999
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May 10, 2013, 06:32:25 PM |
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How do you use 2 stratum proxys? Can they both listen at the same port?
I have two Virtual Debian instances running, and the way I've seen them work is on occasion one of the proxies loses the connection past XXX ms and the other one picks it up without losing a beat. Minimizes random timeout issues. |
Sappers clear the way
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Tulkas
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May 10, 2013, 06:49:54 PM |
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I'm not confident to run those beauties in HIGH clock because I'm not sure what friedcat means by "if you are having heat problems".
Does anyone knows what configures a heat problem?
What is recommended operating temperature?
Where is the recommended place to measure temperature? Radiator? PCB? On top of hashing chip?
Run them in high. If they get too hot, they'll restart and go into low clocks - that's your warning. Too hot means the boards are resetting, although arguably we'd want these boards as close to room temp as possible. I'd say radiator is the only place you can really measure. How have you mounted the mini fans onto the heatsinks? I've mounted the fans using liquid epox, they withstand high temperatures. With the clock in high they get so hot you can only keep your hand over it for 15 seconds or less. |
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drlatino999
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May 10, 2013, 07:17:33 PM |
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desired, which pool are you on?
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Sappers clear the way
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dogie
Legendary
Offline
Activity: 1666
Merit: 1185
dogiecoin.com
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May 10, 2013, 07:27:42 PM |
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I'm not confident to run those beauties in HIGH clock because I'm not sure what friedcat means by "if you are having heat problems".
Does anyone knows what configures a heat problem?
What is recommended operating temperature?
Where is the recommended place to measure temperature? Radiator? PCB? On top of hashing chip?
Run them in high. If they get too hot, they'll restart and go into low clocks - that's your warning. Too hot means the boards are resetting, although arguably we'd want these boards as close to room temp as possible. I'd say radiator is the only place you can really measure. How have you mounted the mini fans onto the heatsinks? I've mounted the fans using liquid epox, they withstand high temperatures. With the clock in high they get so hot you can only keep your hand over it for 15 seconds or less. To overclock you need 2x120mm fan on each. |
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