Burning out Video cards

[Frankthetank]

Hi All,

I have an HD 6770 (powercolor 800/1200) mining LTC which runs rather hot:

143kh @ 95 Cel
210kh @ 104 Cel

I have run it at 210kh 24/7 for a couple of weeks without issue but am a touch worried so have since dropped it to 143kh. Has anyone had similar temps/failures? Have searched pretty hard for documented failures at high temps but haven't found much. My main rigs run 7950's so this card is really just experimental and am tempted to just run it at 210kh to see how it goes (have had a couple years gaming out of the card already).

Power consumption is more or less proportional to the hash rate.

Anyone have any experience with wrecking cards in this fashion?

[BaldOrc]

do you maximize card's fan speed?

[Frankthetank]

Yeah fan is at 100%

[Mogumodz]

I have a 5770 and had the same kind of problem, I dropped the GPU clock to 700 from 850 which was at (90'c) and now it's (75'c) all day long with only a few MH drop.

[Frankthetank]

Yeah I'm currently under clocked at 700 as the hash rate drop was very small and it did lower the temp by 3 cel. I've tried a wide variety of oc combos (and miner configs) and generally there is very little change in temp, it simply runs hot at its best hash output.

[Mogumodz]

I ran mine at 90 for 4 weeks tbh and that's with the EU lead free crap we have before I started to worry.

Only other things I could suggest is point a rather large fan at the machine, I have a 150mm 552m3/h inline fan pointed at the side of the case and it dropped it further to 62/65, but the noise is something else so only use it on really hot days when the underclock doesn't help.

http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313.TR10.TRC0&_nkw=inline+fan&_sacat=0&_from=R40

[fasmax]

I have been running a HD6950 for almost 2 years at 90 to 100 in a crap air flow case.
Board is still running great but maybe I am just lucky its still working.

[Frankthetank]

Ah perfect just the sort of post I want to see, going to thrash it At the highest hash rate, chuck in another fan i salvaged from a dead psu and see how she goes. Cheers

[Kruncha]

Ah perfect just the sort of post I want to see, going to thrash it At the highest hash rate, chuck in another fan i salvaged from a dead psu and see how she goes. Cheers

lol, I've got nvidia cards, I daren't check their temperatures (In case it puts me off).

K.

[redwine77]

i have heard you can ruin the card after a few months of running too hot, that is hot,  but then again, i don't know a whole lot about mining

[killa12222]

104 does sound a little toasy for 24/7. My 5870 is happily humming along at ~65 with 2 fans pointed at it 

[Galli]

That is very hot... I had mine north of 76c before I added a new front fan.  Down to a steady 72c at 98% load...

I would recommend adding some extra flags to your miner.  I use F 90 -w 128 and it's kept the load off of 100% which helps keep it slight cooler.  Only lost 2-3 Mhash/s