I did some overclocking with GPUs and as far as i read the fear of people that simple overclocking can dramatically reduce the lifetime of a chip isnt correct. The biggest problem for chips is when you set the voltage higher. The electron migration (or something called similar) will make the chip go down faster this way. Thats a fast way to crash a chip.
The second way, but far less dangerous is high temperature. At least GPUs shut down when they are too hot. Asics dont do this so one should be cautious with the temperature. But a higher temperature is shortening the life of a chip but not very much.
The third is to overclock the frequency. It doesnt hurt in its own. The only danger is the high temperature. So if one manages to keep the temperature at the same level while overclocking it shouldnt hurt the chip in way that its noticeable.
If you want to make your chip live long and have better power then overclock and undervolt it. That will give higher speed, lower temperature and the overall live of the chip will be extended.
Im not a pro so if im wrong let me know.
Topic: is it safe to set core frequency to 300Mhz (Extreme) for avalon? - page 3. (Read 6438 times)
April 05, 2013, 05:32:53 PM
April 05, 2013, 01:37:18 PM
I have been running mine at 300MHz for a while now. I have not noticed any ill effects. The fans seem to run a little faster.
I believe ngzhang said that running at 300MHz will increase power consumption, and will raise the HW error percent slightly.
I believe ngzhang said that running at 300MHz will increase power consumption, and will raise the HW error percent slightly.
it's proportional, fan is dynamic according to temp.
April 05, 2013, 01:34:50 PM
I have been running mine at 300MHz for a while now. I have not noticed any ill effects. The fans seem to run a little faster.
I believe ngzhang said that running at 300MHz will increase power consumption, and will raise the HW error percent slightly.
I believe ngzhang said that running at 300MHz will increase power consumption, and will raise the HW error percent slightly.
April 05, 2013, 01:23:23 PM
I have a new firmware we ( ckolivas,xiangfu ) just built.
newest cgminer 2.10.5a, much more stable. no more restarts.
PM for a download link if you wish to try.
newest cgminer 2.10.5a, much more stable. no more restarts.
PM for a download link if you wish to try.
Quote
Reply was 'STATUS=S,When=1365179845,Code=11,Msg=Summary,Description=cgminer 2.10.5a|SUMMARY,Elapsed=64024,MHS av=74133.46
thank you for this.
is the cgminer 2.10.5a solely for Avalon use?
April 05, 2013, 01:09:15 PM
300Mhz = safe, but result may vary.
I tried this this morning. Hash went from 68,000 -> 71,000. It ran for about 2 hours and then stopped. I had to call my wife an teach her how to restart the computer over the phone. We set it back to 282 MHz and it has been running for 5 hours. In 4 days it has never stopped when set to 282 Mhz. I think I will leave it there.
April 05, 2013, 11:37:00 AM
I have a new firmware we ( ckolivas,xiangfu ) just built.
newest cgminer 2.10.5a, much more stable. no more restarts.
PM for a download link if you wish to try.
newest cgminer 2.10.5a, much more stable. no more restarts.
PM for a download link if you wish to try.
Quote
Reply was 'STATUS=S,When=1365179845,Code=11,Msg=Summary,Description=cgminer 2.10.5a|SUMMARY,Elapsed=64024,MHS av=74133.46
April 05, 2013, 10:23:06 AM
And, @solarsilver, I didn't open another working avalon. But I did take a picture of that PSU from outside:
is this how it came? no panel to cover the psu?
April 05, 2013, 09:57:39 AM
So I tried to check every connector . And yes, I found one loose!
After replug the loosed line, turn it on, every thing back to normal : 65G at 282Mhz.
Sorry @SolarSilver I didn't pull the PSU out to see the label. I think of put it back to work quickly.
After replug the loosed line, turn it on, every thing back to normal : 65G at 282Mhz.
Sorry @SolarSilver I didn't pull the PSU out to see the label. I think of put it back to work quickly.
I'm glad to see you found the loose plug, nobody is going to lose sleep over the power supply label ;-)
You can run the systems at 300, they work fine here (because temperature is low due to extended winter in our hemisphere), don't forget they do consume 50 Watts extra if you push them from 282 to 300
April 05, 2013, 09:36:22 AM
the trick is to leave the sides with 4 circles still screwed in but loose and slide it to fit closed then use needle nose pliers on the sides with 3 to keep them from falling back in case before you tighten them one by one.
April 05, 2013, 09:03:14 AM
I think when you overclock it the power usage will go up much more, after all its overclocking.
April 05, 2013, 07:40:00 AM
Hmm yes indeed results may vary, but I think play it safe and keep it a 282. 300 may be necessary when competition for hashing power gets really tough, but for now I'm thankful I got 67 GH/s which is something I would have never dreamed of or thought I could achieve back in the GPU mining days.
April 05, 2013, 05:52:33 AM
300Mhz = safe, but result may vary.
You guys are so cool, you could have say Avalon is 70G ,because it really did. But you only promise 60G. So you give every one 10G extra.
Cheers!
April 05, 2013, 02:09:38 AM
300Mhz = safe, but result may vary.
April 05, 2013, 01:55:35 AM
The 2nd PSU looks like a Corsair Gaming Series GS700
700W, 58A Singlerail
700W, 58A Singlerail
April 05, 2013, 01:38:21 AM
ok, guys, let me tell you what I did today.
First, I open the case and check every connector. I also find out a TT 850W PSU from my storage room ( aha , that's good to find it) , preparing to replace the origin PSU.
this is what I see when open the case:
It's a antec PSU. but there is no label on it so I can't tell the model . I guess the label must be on the other side.
So I tried to check every connector . And yes, I found one loose!
After replug the loosed line, turn it on, every thing back to normal : 65G at 282Mhz.
Sorry @SolarSilver I didn't pull the PSU out to see the label. I think of put it back to work quickly.
It's hard to put the case cover back than open it.
I have to use some paper to help . like this:
And, @solarsilver, I didn't open another working avalon. But I did take a picture of that PSU from outside:
Everything is good. I fixed the 55G avalon to 65G .And I found some other person in this forum also meet the line loose problem.
Hope this thread can be helpful to others.
And now I run 2 of my avalon at 300Mhz, it shows 71G in the gui.
First, I open the case and check every connector. I also find out a TT 850W PSU from my storage room ( aha , that's good to find it) , preparing to replace the origin PSU.
this is what I see when open the case:
It's a antec PSU. but there is no label on it so I can't tell the model . I guess the label must be on the other side.
So I tried to check every connector . And yes, I found one loose!
After replug the loosed line, turn it on, every thing back to normal : 65G at 282Mhz.
Sorry @SolarSilver I didn't pull the PSU out to see the label. I think of put it back to work quickly.
It's hard to put the case cover back than open it.
I have to use some paper to help . like this:
And, @solarsilver, I didn't open another working avalon. But I did take a picture of that PSU from outside:
Everything is good. I fixed the 55G avalon to 65G .And I found some other person in this forum also meet the line loose problem.
Hope this thread can be helpful to others.
And now I run 2 of my avalon at 300Mhz, it shows 71G in the gui.
April 04, 2013, 12:34:04 PM
I can test it later.
April 04, 2013, 11:49:43 AM
Anyone have confirmed 220/240v power consumption numbers? Difference between 110/120v? I'm trying to quantify the power savings vs 220/240v infrastructure costs for 2 Avalons(7 modules). Perhaps I should start a new thread.
April 04, 2013, 11:46:51 AM
I found the PSU are not the same!
maybe I'll change the psu first!!
really?
that's the first i've heard of that.
April 04, 2013, 11:41:33 AM
Quote
Another thing is I have one avalon hashrate at 65G, another only 55G.
Both 282 mhz.
Both 282 mhz.
Looks like some chips are not working. an Avalon has 240 chips so thats 250mhz for each chip.
So i would say 20 chips are not working, weird that its exactly 20, maybe a part of a is not working.
A slot has 8 times 10 chips so maybe 2 sets of 10 not getting power? whats your power usage?
yes i think you are right.
i need a screw tomorrow ....
but i'm afraid of mess things up
maybe the second avalon will say good bye to me after tomorrow.ahh ..Yes!!
I found the PSU are not the same!
maybe I'll change the psu first!!
April 04, 2013, 11:41:11 AM
avalon on 120v USA, pull 658W at 300 and 615w at 282
they do not run any hotter.
they do not run any hotter.
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