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Yeah the 0818 firmware is treating me well so far. I can now hold 360mhz @ less than 2% HW Errors. This was not possible before, 360mhz would be 3+ % HW error rate on previous firmware.
So my MHSav is constantly 84GH+ ... Im wondering what exactly was changed?
Also, the results are during the hotter part during the day, so at night I imagine it will be even better.
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ah ok got ya, the literal translation =)
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If you thing about it, bitcoin is the pure fiat.
I dont follow?... explain are you basing this on the fact fiat has no intrinsic value? Taken from wiki: *any money declared by a government to be legal tender.[7] *state-issued money which is neither convertible by law to any other thing, nor fixed in value in terms of any objective standard.[8] *money without intrinsic value.[9][10] Because the first 2 dont really apply to bitcoin.... |
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HAHA, I do love the closing line: "Bitcoins, B-I-T-C-O-I-N-S - It's available to you inside the google." - AWESOME
I do have to say, I did enjoy the fact the first couple minutes was the intro and almost a mockery of bitcoin in the sense of it being taken seriously cuz its supposedly not backed by nothing...
But then the guy being interviewed took a moment to point out that fiat is backed by nothing but peoples belief in it having "Value" and thats happening with bitcoin as well.
Thought that was an awesome moment of truth! Cuz thats one of the more important things people need to realize bout their "real" money... its just as fake as anything else =P
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Batch#: 2
Modules:3
PowerSupply: Enermax GX850 gold (OEM)
Extra CoolingSetup: replaced the 2 higher RPM Fans w/ delta 5k RPM fans, reworked wiring to modules to allow better airflow
[Firmware Version] => 20130814
Chip Frequency: 358mhz
More Options(Default: --quiet): --failover-only --quiet --avalon-temp 49 --avalon-freq 358 --avalon-cutoff 55 --avalon-fan 90-100
HashRate: ~84GH/s MHSav
Additional Info(whatever I may have missed): temps are 29C/40C/42C when its around 80F outside(probably 85F in the room its in), at night time when its cooler(60-70F outside) .. temps are 23/33/35 .. these Delta fans really helped the temps drop!
Power Usage @ Wall: 760-765w
Uptime: All the time, its a tank =)... only goes down when I hit the APPLY CONFIG button =P
Currently I run 354 on 4 modules stable for the last 3+ days. Average hash is 111.4 GH/s. Since 375 setting does not hash efficiently, I believe I will try Insane (350) setting and manually set 358-365 when I get home to see if hashrate increases and is more efficient. Yeah betweeen 2-3% HW is good effeciency past that its barely any return. Just wasted energy. |
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Batch#: 2
Modules:3
PowerSupply: Enermax GX850 gold (OEM)
Extra CoolingSetup: replaced the 2 higher RPM Fans w/ delta 5k RPM fans, reworked wiring to modules to allow better airflow
[Firmware Version] => 20130814
Chip Frequency: 358mhz
More Options(Default: --quiet): --failover-only --quiet --avalon-temp 49 --avalon-freq 358 --avalon-cutoff 55 --avalon-fan 90-100
HashRate: ~84GH/s MHSav
Additional Info(whatever I may have missed): temps are 29C/40C/42C when its around 80F outside(probably 85F in the room its in), at night time when its cooler(60-70F outside) .. temps are 23/33/35 .. these Delta fans really helped the temps drop!
Power Usage @ Wall: 760-765w
Uptime: All the time, its a tank =)... only goes down when I hit the APPLY CONFIG button =P
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One thing over another, I'd say Avalon's hash unit power supply should have no problem in handling +40% more current (~20% overvoltage and overclock versus the "stable" 350MHz. But this would mean ~+70 power which I'm sure Avalon CANNOT handle as it is, at least for batch #3.
Which part of Avalon you think cant handle it, just the PSU? Can always throw nice 1kw PSU's in them =) 3module is doable for sure I would think. Or are you saying something else other than PSU cant handle this much power increase? |
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AFAIK from reading and looking at design schematics, the main regulator or w/e it is is only capable of around 20A output. We may be gettin pretty close to that on just stock overclocks...
So, overvolting safely may be out of the question.
Why you are saying is capable of only 20A? Grr, I cant remember where yifu posted the design schematics. But the one that shows the layout for each miner board, shows in the VRM section. The main controller chip .. is it a TI or something? Look it up and its max output was like 20amps Limit for IC is only a "soft" limit. From IC's point of view, it's more up to its ability to drive gate and Miller capacitance of output transistors. The Iout, is what I was referring too, your saying thats just a soft limit? Are the mods you speak of .. capable of working on b2 units as well? (I dont know if anything changed from b2 to b3 hash boards...) |
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Thanks lastbit and GandalfG for the info. I have access to a nice 12ghz oscilloscope and will take noise and ripple measurements of the output of the VR and see if it gets unstable past 20a.
Just took some measurements. At the top of the board closest to the VR im seeing 1.2v at the bottom im seeing 1.15v! Im surprised to see so much of a drop! They must have cheeped out on the amount of copper on the board.
I measure my board with my 100MHz oscilloscope with 1.3V mod and did not see noise on power lines. I check it now after over 10 days mining. About drop: Standby: 1.298V 395MHz: 1.278 on coil VR and nearest capacitor 1.268 first two chip 1.228 last chip. I solder silver-plated wire 0,8mm across one board and check how its help. Have any amps / watts per board power measurement? Also, was this a b2 or b3? Did they change anything on the b3 miner boards? |
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on a serious note... couldnt it be that its metal stretching / creeking against each other from temp variances?
You know, like the tick sounds you get when a car has been shut off from being on for a while?
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AFAIK from reading and looking at design schematics, the main regulator or w/e it is is only capable of around 20A output. We may be gettin pretty close to that on just stock overclocks...
So, overvolting safely may be out of the question.
Why you are saying is capable of only 20A? Grr, I cant remember where yifu posted the design schematics. But the one that shows the layout for each miner board, shows in the VRM section. The main controller chip .. is it a TI or something? Look it up and its max output was like 20amps |
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I have access to a nice 12ghz oscilloscope and will take noise and ripple measurements of the output of the VR and see if it gets unstable past 20a.
That would be awesome =) |
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1.3v ... wont that kill the VR? ... like was stated we are at 17-18amps already and it handles 20amps...
From where was the info that it can handle only 20? I dont know where the links to the schematics are anymore... but, it was when I Was reading them. I looked up the main VRM controller chip(fuck if I know what its called) and as per the manufacturers specification the max amps out was like 20amps... |
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to the OP... I think its just you fucking with us, I know you have a quarter in the other hand, just smacking the case =P LOL
haha jk, hope ya figure it out tho...never heard that outta mine. Then again my aftermarket fans are way to loud to hear something like that =P
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1.3v ... wont that kill the VR? ... like was stated we are at 17-18amps already and it handles 20amps...
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Didn't bother to read it, but let me guess: not transferable p2p, pegged to $ and of course very un-anonymous - right?
People on facebook dont really care about their anonymity ... lol, otherwise facebook wouldnt exist. |
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Batch#: 3
Modules:4
PowerSupply: 850w Seasonic Gold Modular
[Firmware Version] => 20130723
Chip Frequency(Default: Advance): 350(insane); 354 is actual read out.
Umm.... 850W with 4 modules at 350+mhz? I hope you have another PS laying around for when this one goes up in smoke. For comparison, I have a good 910W PS on a B3 @ 325mhz and it pulls ~915W from the wall, a 65W increase from 300mhz which was 850. My estimates put 350Mhz B3 4 module at 980W give or take from the wall, or basically you need a 1KW+ supply guaranteed! He may be running close but under the PSU's max. Seasonics are tank PSU's. Assuming your PSU is 90% effecient at that sort of powerdraw(which its likely less) that roughly a 90watt overhead from the wall. 915 - 90, leaves actual load near 810watts. His seasonic should have no prob with that. |
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How is MHSav calculated? Is it based off valid diff1 work?
Meaning HW errors is already accounted for in MHSav?
By my calculations based on clockspeed, looks like it does account for HW% error.
Also does --avalon-temp clock down regardless if --avalon-auto is used or not? Also, how does that relate to --avalon-freq if setting it to one value... will --avalon-temp still clock down?
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AFAIK from reading and looking at design schematics, the main regulator or w/e it is is only capable of around 20A output. We may be gettin pretty close to that on just stock overclocks...
So, overvolting safely may be out of the question.
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Very nice data. Where is your tip jar?
Thanks and thanks. No tip jar for so little  I consider my Avalon batch#3 unit a nice done product. It came with a 850 W PS. It's an Enermax Gold able to put 840W on 12V. Out the box Avalon unit can run much higher then specifications. But I'm not so sure that it will be able to pay itself, even overclocked like this  So I'm willing to try to push it more. I believe there are two problems which need to be solved: - Cooling is less then optimal. The modules (heatsinks) are much hotter at the end. But the exhausted air it's only warm. I have some ideas of how cooling can be improved.
- Voltage on the chips must be raised a little. It's now around 1150mV (both from schematics and measurements). Specification of the chip is 1200mV. I believe it will be no problem to push it around 1240mV, which I hope it will allow it to run at 375MHz. But this will mean ~25% more power, so cooling has to be solved first. And this would be a hardware mod, 40 resistors to solder.
And during the time the unit is upgraded, it does not produce, or at least not at full capacity Can a voltage increase be safely done w/o drawing to much current through the power circuitry? Cuz they are only rated for something like 20 amps, and I thought at default voltage / clocks we are pushing pretty close to that.... |
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