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Author Topic: How hot is too hot?  (Read 1062 times)
Sekioh
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April 11, 2013, 10:57:28 PM
 #21

Well if you're mining bitcoins, with cgminer you can also very easily drop the RAM clock on it, that saves a LOT of thermal output. Bitcoin mining don't rely on memory as much as raw computational power. Personally I found a sweet spot at memory:300 and dynamic gpu_clock:600-800 so it can throttle if it does overheat, then I set the thermal ranges in cgminer to be 75 base target so it will clock up or return to normal if it's up to that, and 80 as the overheating where it will start to raise fan and throttle back, and 85 where it will cutoff and just take a break as it's overheat range. It's been working great.

Before cgminer had the really good thermal and clock code put in, last year I let it run and tried to clock with the regular program adjusters and I couldn't seem to keep the temperature down, so for a long while I had extra case fans and they still wanted to crank 85-95 range for a few months. I would say 90+ is bad, 80-90 is strenuous, and 75-80 is a fine range for a long few years lifespan.

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statokinetics
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April 11, 2013, 11:28:40 PM
 #22

Yeah, I'd definitely agree with what folks say here and argue that you really want to keep it around 70-75. Overclock as much as you stably can while still staying in that range! I suppose it might be fun to actually Vmod a few cards and get back into the overclocking game...ah, goodness. Back in the day, it had to be done for its own reward -- now, there's a completely legitimate reason to do it! Exciting.
AlexanderB
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April 12, 2013, 12:04:33 AM
 #23

OK, I'll admit I ruined 2 Ati cards, 1 died at almost 2x stock clocks at 2.5V under dry ice, the other died at stock clocks when the water cooling failed and the fullcover waterblok reachted >boiling temperature for prolonged time (memory fried, artefacts..)

Anyway, mining bitcoin isn't very memory intensive (I hear LiteCoin is, but not sure..), so for Bitcoin, you could dial the memory right down and make sure that doesn't fry..
takynakasi
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April 12, 2013, 12:38:01 AM
 #24

Nice one - boiling in waterblock... expensive cup of tea...
I thought miners can be set to not go beyond certain temperature. At least ufasoft miner can do this.
Marv21
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April 13, 2013, 10:53:49 PM
 #25

Nice one - boiling in waterblock... expensive cup of tea...
I thought miners can be set to not go beyond certain temperature. At least ufasoft miner can do this.

Thats right. Cgminer and BFgminer can do this, too. But you have to set it Smiley
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