I'm not buying. The whale seems to be running low on ammo. Wait and see...
There was just another crazy market order with heavy slippage. What are they doing?! Other exchanges are NOT following. Buyer Beware! Price is being inflated on Gox, this can only be temporary. they will do sooner or later. Bitstamp shows 94. Btw what's up with bitstamp on bitcoincharts? |
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Looks great!   What's your hashrate and clock speed? I'm very interested in those numbers to compare them to my own: I have tried to cool down my Avalon with an A/C like in this thread: https://bitcointalk.org/index.php?topic=242423.0Temps look fine: 15-19°C in the casing, 33-40°C at the blocks (Chip temp was below 50° all the time). But the hashrates are exactly the same as without the A/C, at 29° in the case and 45° at the blocks. Even at 50° block temp I have the same maximum hashing speed of ~82-83 GH/s @ 355 MHz. If I cramp up the clock, hardware errors increase so much that the hash rate drops down. The only difference I noticed when using the A/C is that I could run speeds like 400 MHz (with ~50% HW errors and hashrates <70 GH/s). Without the A/C, the highest clock speed is 385 MHz (also with high HW errors and lower hashing speed). Has anyone noticed the same increase in HW error rate when cramping up the clock speed above 350-360? This seems to be a barrier, regardless of the cooling. I was thinking of a water or oil cooling myself, but now, the only reason to do this would be to reduce the noise.  I've posted this before, together with temperatures - read back on this thread. Took me from 21st of May until now, almost 8 weeks later!
Is the plumbing to each block in serial or parallel? 3 piece (one Avalon) serial, the individual Avalon's parallel. Gotta say that all parallel would suit the pump better probably, also a bigger diameter hose would be nice. But as said before it wouldn't improve the hashrate any more so I didn't bother to change it. Please note that the two hoses to the water bottle are short circuited near the pump, so normally there is nothing running up and down. |
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Alright Guys... Is this going to end soon, or is this the new normal?
By god sir, I will not abide another 7 hour block |
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Took me from 21st of May until now, almost 8 weeks later!
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withdrawal euro 5\20 1000E 50 days waiting nothing for moment
i have 2 other 6\4 and 6\5 transfer 40 days waiting
mt gox say me wait ... 1 year 2 ? i dont know ....
cancel, wait for a good moment, buy btc and sell on bitstamp |
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Did you do anything to control the thermal compound layer thickness in those tests?
No |
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Ambient is sensor one. That thermal pad was delivered with my batch two unit.
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 I gotta say both my chiller and the pump are at their limit. Water set value is 30 degree as to avoid condensation, but the chiller is any ways running 100% at this hot weather so setting a lower value would have no effect at all. |
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Maybe dogie just wants to drive the price for his units? If I were him and holding the secret of how to OC a 3 module Avalon to >120GH/s I wouldn't sell them...
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Inspired by this thread https://bitcointalk.org/index.php?topic=212090.0 I decided to have a try to improve the resistance between the chips and the aluminium. The cooling areas of the chips are a bit lower than the board surface and the used thermal conductive foil doesn't show any marks - so it doesn't have real contact.  I removed all my PCB's from the heat sinks once more and applied thermal compound.  That's more like it  I know, a little more wouldn't have hurt probably but I only got 3 syringes and wanted to finish that rig. At least 4g required for one board. Result: 10GH/s more in --avalon-auto mode (much less HW errors) |
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Just to sum up things just to make sure I understand it well ...
Assuming I am able to cool it down properly (server housing room with low temp), what is possible with the very default batch #2 Avalon? It's default clock is 300. Would it be somehow dangerous with the default PSU to try to overclock it? If I set the conf to 300 and range 300-350, should it handle it?
350 should be *safe* out of the box on the Enermax PSUs. will net 82-83GH. Anything more and I think we're waiting for the volt mods to be honest. I am running active water cooling - netting around that. Cooling is not the issue for getting beyond that any more. |
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Any thoughts on running a refrigerant through the blocks?
Condensation. My enemy. |
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I have 3 Avalons and I'm working on putting in a dedicated circuit in the basement for them. At an estimated 2100 watts at 110v (USA), I'm looking at 19A, which just pushes the limits of standard 20A breakers, with no room for future expansion.
What I've been thinking is that I can wire up an outlet at 220v, get slightly better power efficiency, and reduce my amps to about 10A, leaving plenty of room for future boxes.
Can anyone advise on a proper wiring diagram for 220v that's compatible with the 3-pin input on the Avalon PSUs?
As of right now, my understanding is that I'd wire black and white both to hot (on a dual-pole 20A breaker) and ground to ground, with no neutral. I should get 220v with the two hots as the breaker pulls in 110 and -110 for the two hots. I know I would need to get the correct outlets for 220v also as well as adapters or proper 220v PSU cables.
http://en.wikipedia.org/wiki/IEC_60320 . The biggest and longest pin is PE. |
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So you would need to both increase the voltage and increase the output current capacity is what you are saying? I'm not familiar with the Avalon stock design, so I wasn't sure if you could modify anything beyond the clock frequency
Soldering required for higher rates, and I am even not so sure if it can go much higher... who knows? |
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where did you get the watercooling? is there a setup released for avy yet?
in my sig |
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Increased the water temperatur and frequency a bit... HW error now 1.3%   Still the frequency doesn't move by itself. With such a high hashrate over Stratum, what's a normal accepted / rejected ratio for a pool? I seem to be running below 90% which seems bad...
I don't know - but I am on the other end of the world and slush's pool is working fine for me... |
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give it a little more time, I notice it climbs up slowly...
Gave it over night, same result at similar HW error rate maybe it is waiting for fan readings? and because you don't have them, it doesn't work? is it possible you attach the fans, to see if that helps? nope, invader was so nice to make that clear in the code here https://bitcointalk.org/index.php?topic=140539.msg2655790#msg2655790 |
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give it a little more time, I notice it climbs up slowly...
Gave it over night, same result at similar HW error rate |
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I just don't get the --avalon-auto function working  I don't know what I am doing wrong. According to my calculations this should be ~1.2% HW errors, so why the frequency doesn't go up? Does the controller wait for a certain temperature to be reached? This is a water cooled unit. Settings:  I also tried "--avalon -auto", which doesn't work at all |
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