Think people need to do heat sinks in local context. Larger orders shipped world wide going to get expensive for weight right? I am looking in Indonesia for a supplier for my boards. Might be smart for those with larger orders of boards to simply put heat sinks on after getting them.

I've swapped that unit over to a Raspberry Pi.  Quite painlessly, actually.  Removed the P5 jumper, grabbed a longer USB cable, compiled cgminer with Avalon support, and off she went.  To anyone else who might also try this, I had to run cgminer as root.  I had a rules.d for the FTDI, but maybe that wasn't working for some reason. meh.

I will let this run for a little while and see how is does.

I checked to make sure it was seated correctly, along with the other cables.  However, I didn't try swapping the USB cable.  I might give that a try later after letting the Raspberry Pi have its fun.

My advice: get a refund and don't look back.

I thought the chips were roughly 2.5watts each, so 16 x 2.5 would be 40watts rather than the 32watts in the OP?


Has anyone heard anymore from Avalon about the open source details of their modules that were supposed to be released in May? It's just we are over half way though May already.

One of my Batch #2 Avalons is having trouble.  Every so often (~15 minutes on average) I get a long burst of these kinds of messages in the System Log (dmesg):


While that is occuring, all mining stops.  Either it eventually goes back to normal, or I see a message in the System Log saying that ttyUSB1 was disconnected, and then reconnected as ttyUSB0 (and vica-versa).  cgminer dies if that happens, and restarts.

I have another Batch #2 running smoothly.  So far, I have checked all of the connectors on the TP-LINK, PDU, and control unit.  I replaced the PSU, left the cover off, and left the PSU outside of the unit.  No joy.  All of the version numbers match my other Batch #2, so there are no differences in software/firmware.  One odd thing is that I notice mention of a usb hub on the wiki page, but there is no hub inside either of my black Avalons.  Is the hub built into the control unit?

I can only think of two other things to try.  Backup the working Avalon, and flash it to this Avalon, in case there's something weird in the software.  Or, replace the TP-LINK with a RasPi and hope that the control unit isn't at fault.

Today I turned it on:



It works great but seems one module is broken, the other 2's heats and works flawlessly.. the bad one is colder. I'm not getting the average 65Gh/s of a standard Avalon. This is very frustrating  

I believe my unit was damaged during freight or even at customs, but considering the unusual scratches and dust inside of a the unit.. there is no doubt this is a used before item.
On the other hand, the parcel was amazingly well wrapped and sealed.. thick foam packing bars on every corner + full of airy sheets inside & outside of the containing box.. Really, I can't imagine what kind of scenario it had to go through to end like this.
Some might blame EMS others might accuse Avalon Team, but I'm the true victim here. Receiving a used unit never was part of the pre-order conditions (correct me if I'm wrong).

Does the Avalon warranty applies here? please share your thoughts.

Yes, welcome to the real world, where there are winners and losers.

Hi,
I own custom machined parts shop .( EU based)
We do a lot of custom fans .
May be it'll be a  good way to use standad Alu profile to be cut and drilled to specs.
Most probably it's going to be with ribs in one direction .
In a day or two I provide calculation based on your specs

You seem to be very good at counting other peoples' money.

+1

Don't worry bro, haters are just jealous. I'd fork over 300btc for this beauty if I had it.

Avalon are purposely delaying orders just to spite people reselling? C'mon

This guy wanting to sell his order makes no difference to anyone else's order! It's his, he bought it, he can do what he wants with it.

No, the NOR gate and the oscillator are unrelated. Just both design changes made today. The spot for the oscillator will still be there but during testing I will be able to test without it by shorting two pads, bypassing it. Doing this and seeing how stable the ASIC is will tell me if it can be removed entirely. Typically at these clock speeds the jitter isn't an issue but since the ASIC multiplies the clock to get up to 300 MHz it could be, and so it needs to be tested and probably scoped before any decision. The PIC clock is good enough for USB specs and it would just be nice to remove unnecessary parts.

This did look tricky at first and a software only solution would be difficult or impossible. I went to bed last night thinking about how to make this work. Woke up this morning with the answer.

I'm using a single NOR gate on the REPORT_N / _P outputs. This combines the two data signals to extract a separate CLK. I use the EUSART on the PIC in Synchronous Slave Mode. This accepts stateless data RX, CLK as input and shifts in data at high speed. I take REPORT_N as data (either will do) and the combined CLK. The UART has a 2 char FIFO and interrupt, so the instruction cycle isn't a constraint any more. Oh, and I've added a small capacitor to delay the clock edge slightly because the NOR gate doesn't have much delay. This should make data sampling reliable.

I already had the UART pins routed to the ASIC but was expecting asynchronous data. So had to change plans on that.

So total cost for solution is 0.12 gate, 0.015 cap = $0.135.

I've already discussed this with allten and we also discussed being able to remove the oscillator and use the internal oscillator in the PIC. This saves about $1 cost but will depend on whether the ASIC can live with the jitter as the PIC PLL is not as good as an oscillator. I don't know how sensitive the ASIC PLL will be, but I'll leave the oscillator pads on board so that either method can be used.

 

Personally I think that after that they delayed batch 2 for 2 months (and counting) they really can't tell us what to do with our units. I'm quite sure that he wouldn't have sold it, if the unit was received on time (firsts of march).

I get your point, but I don't agree with you.

He, he got incredibly lucky.
But how does he damages the other Avalon customers? Sorry but as you said, I don't understand it.

Why you dont complain at the same level of the am blades, that are as massively overpriced as this?
If not for 300btc, I'm quite sure that he will have no problem placing it in the 200/250btc range.

Feel free to post your offer if you are interested.

Order #44xx made on February 2, 2013. Order status: completed.

I have tracking number for this order. Should arrive Friday/Monday according to DHL. Buy now.

BTC (escrow payment with john) or wire transfer.

300btc

He can test by just removing the 10-chip board, and seeing if it still works. If it works without the board, he can leave the board out, and remove chips from it, leaving the board(s) out until he gets the chips back.