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Topic: BAMT version 0.5 - Easy USB based mining Linux with farm wide management tools - page 52. (Read 324169 times)

sr. member
Activity: 336
Merit: 250
Side topic comment: I leave my fans at 86% fixed, haven't had the same trouble as some others with the 5830 Sapphire (BitcoinXtreme versions lol). Small sample size but judging from what I've read from datacenter studies, Google has published several, reliability isn't that different between low and high for most computer parts. Main exception if I remember right was hard drives which both Google and Microsoft have found are the least resilient to high temperature and constant use.
hero member
Activity: 742
Merit: 500
hero member
Activity: 616
Merit: 506


Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.


No.

Running fan at 100% is fine.  Changing its speed a lot can in fact lead to premature failure.  Best to set it at some large value and leave alone.
My aching and dying fans have told me otherwise in the past.

I suppose you did an exhaustive study with a large control group of fans not set to 100, compared to a large set of samples with fan set to 100?
Because I did..  and found the fans most likely to die were those on "auto" where they varied in speed.  In fact none of the fans set to 100, 85 or 50 had any failures at all.
No... but 3 5870s at 100% all failed in 2 1.5 months, where 6 5870s with autofan have yet to fail in more than 4 months. I should have a larger set to choose from, true.

The quality of the fans in various samples probably has more to do with fan life than the way that you use them.  However, I do have several models from several manufacturers that have run for nearly 1 year at 100% without any issue.
rjk
sr. member
Activity: 448
Merit: 250
1ngldh


Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.


No.

Running fan at 100% is fine.  Changing its speed a lot can in fact lead to premature failure.  Best to set it at some large value and leave alone.
My aching and dying fans have told me otherwise in the past.

I suppose you did an exhaustive study with a large control group of fans not set to 100, compared to a large set of samples with fan set to 100?
Because I did..  and found the fans most likely to die were those on "auto" where they varied in speed.  In fact none of the fans set to 100, 85 or 50 had any failures at all.
No... but 3 5870s at 100% all failed in 2 1.5 months, where 6 5870s with autofan have yet to fail in more than 4 months. I should have a larger set to choose from, true.
hero member
Activity: 616
Merit: 506


Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.


No.

Running fan at 100% is fine.  Changing its speed a lot can in fact lead to premature failure.  Best to set it at some large value and leave alone.
My aching and dying fans have told me otherwise in the past.

I suppose you did an exhaustive study with a large control group of fans not set to 100, compared to a large set of samples with fan set to 100?
Because I did..  and found the fans most likely to die were those on "auto" where they varied in speed.  In fact none of the fans set to 100, 85 or 50 had any failures at all.
rjk
sr. member
Activity: 448
Merit: 250
1ngldh


Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.


No.

Running fan at 100% is fine.  Changing its speed a lot can in fact lead to premature failure.  Best to set it at some large value and leave alone.
My aching and dying fans have told me otherwise in the past.
hero member
Activity: 616
Merit: 506


Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.


No.

Running fan at 100% is fine.  Changing its speed a lot can in fact lead to premature failure.  Best to set it at some large value and leave alone.
hero member
Activity: 616
Merit: 506
hero member
Activity: 497
Merit: 500
Are 7970's supported in 0.5c?

They are not supported "out of the box" in 0.5c, but I got 7970's working by doing the following:

Starting with a fresh install of bamt 0.5b (later versions should work i would assume).



Holyshit! Good to know.

* gigavps starts plotting a purchase of 7970s.......

No don't wait a week for the 7990's to come out.. much more worth the money. 1.3Ghash per card cost 849.99

Thats why I am selling of a lot of my 5 series and 7970's
hero member
Activity: 742
Merit: 500
vip
Activity: 1358
Merit: 1000
AKA: gigavps
Are 7970's supported in 0.5c?

They are not supported "out of the box" in 0.5c, but I got 7970's working by doing the following:

Starting with a fresh install of bamt 0.5b (later versions should work i would assume).



Holyshit! Good to know.

* gigavps starts plotting a purchase of 7970s.......
hero member
Activity: 497
Merit: 500
Thanks I will try that later!
sr. member
Activity: 309
Merit: 250
Are 7970's supported in 0.5c?

They are not supported "out of the box" in 0.5c, but I got 7970's working by doing the following:

Starting with a fresh install of bamt 0.5b (later versions should work i would assume).

EDIT:  One person I was trying to assist could not get his 7970's to work, even following my method above... However I have done several fresh installs (to verify) and its worked every time for me.  I have 2 rigs running 7970's only.  They each have 3 x 7970's and work just fine for me on BAMT with this method.
full member
Activity: 195
Merit: 100
Thanks for the tip Isokivi! I've deleted the file /live/image/BAMT/CONTROL/ACTIVE/noOCx and my Mem is now back to normal 175 Mhz speed.  Other than that, are there some clocks I should try to get my performance up with minimal compromises?

You are thanking him for useless and incorrect advice? According to your posts and config, you were not overvolting or underclocking as he suggested and he told you to change a commented line while leaving it commented....hmph. 

BTW, no offense Isokivi, you did warn him about your knowledge level. I fully support your efforts to try and help him.
hero member
Activity: 497
Merit: 500
Are 7970's supported in 0.5c?
sr. member
Activity: 309
Merit: 250

Thanks for the tip Isokivi! I've deleted the file /live/image/BAMT/CONTROL/ACTIVE/noOCx and my Mem is now back to normal 175 Mhz speed.  Other than that, are there some clocks I should try to get my performance up with minimal compromises?

Aggressive way:
I run mine and make sure they are stable at stock gpu speeds with mem underclock for a day or two.  After that I try running at 800 MHz gpu clock.  Out of 6 cards (12 cores) only two cores could not run 800 MHz (they run at 790 and 795 MHz just fine).  My other 9 cores run between 800 and 855 at stock voltage... I have one "magic core" that is stable at 880MHz at stock voltage.  If 800 MHz fails during the next day, i decrease that core(s) by 10 MHz, if it succeeds, I increase by 25 MHz, until they fail, then decrease by 10 MHz until they run stable.  I recommend you do it while you have the ability to reboot the machine to minimize downtime.  You can get pretty close to stable OC's in a few days with the only downtime being a few minutes while you reboot (if/when needed).

Safe way:
Increase clocks by 10 MHz and let run for a day... then repeat.  Takes longer to find stable OC's, but allows for higher uptime, especially if you are not going to be near the rigs.  I did all my rigs the aggressive way, but had to revert to the safe way on one of my rigs as one cards OC was causing others to lock and I would change the OC on the wrong card... isolated issue from what I hear, but the safe way helps eliminate issues like that.

I had stability issues with my mem at 175 on my 5970's, so I run at mem of 190... something to consider... I got all my OC's stable at 310 mem, then ran 190 for about a week... then tried 175 and had issues, so I moved it back to 190... not sure if thats just card specific or what... but I didn't spend much time on it as the difference is negligible at that low of speeds anyways.

Also, earlier in this thread is a post by lodcrappo about OC'ing eating into your profits, you might want to go read that as he has some numbers about how much ROI you get for overclocking and hours of downtime don't make up for a small overclock increase... Its a good thing to read and consider while you are looking for stable clocks.

I run everything with air cooling and no overvolting, so YMMV depending on your setup.
newbie
Activity: 47
Merit: 0
Im propably the biggest noob who dares give advice here so you might want to wait for confirmation but to me it seems that your feeding stock voltage to a highly underclocked card. It may or may not be the source of your problems, but either way I'd lower the core voltage.

Core isn't underclocked.  Stock for 5970 is 725.

Thanks guys - here is my corresponding BAMT dashboard:



Do a search in this thread for "Mother" you will see why your card is at 725 and 1000.

Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.

Finally, about the comment above....the # in front of a line means that line is ignored so....# core_voltage_2: 1.125000 would not change the core voltage. It would do nothing until the # is removed.

Thanks for the tip Isokivi! I've deleted the file /live/image/BAMT/CONTROL/ACTIVE/noOCx and my Mem is now back to normal 175 Mhz speed.  Other than that, are there some clocks I should try to get my performance up with minimal compromises?
full member
Activity: 195
Merit: 100
Im propably the biggest noob who dares give advice here so you might want to wait for confirmation but to me it seems that your feeding stock voltage to a highly underclocked card. It may or may not be the source of your problems, but either way I'd lower the core voltage.

Core isn't underclocked.  Stock for 5970 is 725.

Thanks guys - here is my corresponding BAMT dashboard:



Do a search in this thread for "Mother" you will see why your card is at 725 and 1000.

Also, you may want to reconsider 100% fan...unless you enjoy replacing fans every few months.

Finally, about the comment above....the # in front of a line means that line is ignored so....# core_voltage_2: 1.125000 would not change the core voltage. It would do nothing until the # is removed.
newbie
Activity: 47
Merit: 0
Im propably the biggest noob who dares give advice here so you might want to wait for confirmation but to me it seems that your feeding stock voltage to a highly underclocked card. It may or may not be the source of your problems, but either way I'd lower the core voltage.

Core isn't underclocked.  Stock for 5970 is 725.

Thanks guys - here is my corresponding BAMT dashboard:

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