Topic: Avalon Clone Assembly Service Europe - page 8. (Read 20438 times)

Kartaiv:
I have not had direct contact with the workshop personally. We have simply asked for quotations using the drawing I supplied. The price was too low to be custom extrusions. The factory will make a sample unit tomorrow, then we decide if we should go ahead and make all of them. I should be able to post a picture on wednesday or thursday.

You made me worried for a moment! The slot is 3 mm, I hope I will not have to custom machine them...




jelin1984:
I will reply to your PM asap!

I think I might be on to something for the fasteners. Try looking up M5 DIN 546 (Slotted Round Nuts). I wasn't able to find one with the exact same dimensions that you posted, though. Everything seems to match except the slot width -- Is it possible that slot is only 2mm and not 3.1mm?

Thanks Strom!

Question: are you having the heatsinks custom extruded or did the manufacturer find a matching existing extrusion?

subbed

Woo! Bitcents :O  1PXsqWkAmTRzxK4rJStMjHcVtAaMZWi5cg

centibits? really?   

Kartaiv: Thanks! It must be new for batch 2, the unit I have access to is from batch 1, the status LED is taped on to the  fan... I will add two holes for status LEDs. Send me a bitcoin address and I will send a couple of centibits

Just noticed that it seems the front is missing 2x 5mm(?) round holes for status LEDs.

Kartaiv:
I don't know yet, I will let you know if I find out. I made a picture to help source the parts

What are the connectors that hold a case like this together called? :O

The CAD drawings for the enclosure are done. I will send bitcoins to anyone who finds serious errors in the drawings

• case_r1a.zip
• m2_ac_case_back.pdf
• m3_ac_case_front.pdf
• m4_ac_case_side.pdf
• m5_ac_case_bottom.pdf
• m6_ac_case_top.pdf

Given the not so big price difference, you're probably good with an 850W PSU.

Haven't had such great experience with Super-Flower, but Fortron is always decent. I would go for a Platinum certified PSU, again not much more expensive. Multi rails or single rails doesn't make much difference if you do the cabling yourself. Single rail if the end-user does it

PCPower has a nice 860W, almost industrial grade unit. only Silver though I think. (I'm using Enermax Platimax, so far so good for GPUs).

Good point!

Looks like the efficiency peaks at 50% - 80% of the maximum power...
http://www.anandtech.com/show/2624/3

If I got this right it would mean that the optimal PSU would have a marked rating approximately within this range:

3 module unit: 650W - 950W
4 module unit: 750W - 1250W

You want to load the PSU at least 50%, so don't take too much margin.

My guesswork and assumptions regarding the numbers on the wiki.

I would assume the 149W number includes losses and is simply 595W divided by 4. They probably took a 4 module Avalon and measured with a power meter on the outlet. A 3 module unit would draw 595W * 3/4 = 446W.

Avalon draws its current from the 12V supply, so you must only look at the amperage numbers on the power supply:

750W, 60A 12V => 60A * 12V = 720W on 12V
650W, 48A 12V => 48A * 12V = 576W on 12V

Adding the 20% margin ends up in numbers in the same range:

4 module avalon = 595W * 1.2 = 714W
3 module avalon = 446W * 1.2 = 535W (plus some losses not accounted for above)

The next question is if you can trust the numbers on the PSU. You will want a PSU that lasts a very long time on high load, so the higher margin the better I would say.

I would think you will definitely be good with a 1000 watt supply, but a good 850W or 900W may get you there for a 4-module.  I do no believe you're going to want to use the 750.

thanks for the feedback
Based on what I've seen others post, Batch 2 Avalons are shipping with an Enermax GX 750 PSU; is this sufficient power for the 4th module? Seeing the specs from the wiki, it seems not; so how much power is req'd to handle 4 modules? If we follow the 20% margin: (620+164)*1.2= about 940W, minimum?

Module power consumption: 149W @ 20GHs / 164W@ 22GHs
Machine power consumption: 595W @ 220V-AC / 620W @ 120V-AC

silverserpent:
Yes I will test everything I ship.

I have not sourced PSU:s yet so I have no reply to that yet. There are a few suggestions on the wiki, might be worth taking a look:
https://en.bitcoin.it/wiki/Avalon#Power
If you follow the recommendation I assume you will be safe: "For 4 module units: 750W, 60A 12V, at least. recommend for a 20% margin."

The PCB:s are in production and are to be assembled within two weeks from now, I should have them not more than a week after that. The heat sinks are being manufactured as we speak and will be finished in the next few days. The cases will be ordered in the beginning of next week.

I plan to have everything ready before the end of june so that I can assemble the chips the day they arrive. I don't believe the chips will have started to arrive during june, but who knows, I am doing everything to have all components in my hands asap.

I don't know about shipping costs to USA, selecting a shipping method would depend on the daily return of the unit at the time of shipping. I do not have an account with any shipping companies and I will not be shipping many units so I can probably not get the best prices. If you have an account, maybe through your workplace I would recommend using that...

TheSwede75: Unfortunately I don't have many chips, I'm holding tight the few I have

Tack!

Strombom,
Fellow Swede here. Any chance that you have spare. Avalon chips enough to sell a complete Avalon including chips from your own order? I would be happy to reimburse you for the chips @ a price over market.

Lycka till med allt!

Hi!

One module consists of 80 chips mounted on 8 hashing units. Those 8 hashing units are mounted on a heat sink together with a back plane and a ribbon cable. This is not a stand alone unit, you need a working Avalon with a free slot to use it.

For a working miner you need:
Cabling
Router
PSU + power distribution board
Control unit
1-4 Hashing modules
Optional casing

I have ordered a few extra control units (as backup if some are broken), so if you are interested you can reserve it and I will get the additional parts, but it would cost a bit more than $730. Most modules are sold in multiples of 4 as a complete unit.

Do you speak swedish? You are very welcome to deliver the chips and pick the units up at my place