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Author Topic: Pictures of your mining rigs!  (Read 1622072 times)
rupy
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August 08, 2013, 08:07:04 AM

@Xian01 my guess is those powerbricks wont last 2 months like that...

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Xian01
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August 08, 2013, 02:07:28 PM

@Xian01 my guess is those powerbricks wont last 2 months like that...

 Why do you say that ? Decent air-flow and temperature in that room, and the bricks are not hot to the touch at all.
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August 08, 2013, 07:40:34 PM

Its a bit embarassing (like my electronics-fu is now totally blown), but seeing as the chip on the left just found a block (and at a ridiculous 1 billion difficulty), its just so much of an unlikely event that I just had to share. BTW that's an EP4CE10E22C8N mining at 12 MHash/sec !!

Cool, I have a 3 DE0-Nanos and was running them at 6.67 MHash a sec, powered by USB. I thought it would be cool to try to build something with the largest non-bga FPGAs from Altera but I guess it would be far from profitable at this point.

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August 08, 2013, 09:04:17 PM

Cool, I have a 3 DE0-Nanos and was running them at 6.67 MHash a sec, powered by USB. I thought it would be cool to try to build something with the largest non-bga FPGAs from Altera but I guess it would be far from profitable at this point.

I've got mine up to 35Mhash/sec, albeit with a custom power supply hack (bypassing the onboard regulators and directly supplying 1.2Volts at around 2 amps). Even if you keep the USB connection for comms you can supply 5V externally at around an amp or so (if you blow a lot of air over the regulators) and push it up to around 15-20MHash/sec.

BGA packaging is a huge problem for the hobbyist. I managed OK with the 144 pin TQFP's (using a commercial breakout board), but it really limits you to the very smallest devices. I completely balked at BGA (I picked up a Xilinx LX9 in BGA really cheaply, just to see what it looked like, but I haven't even tried to mount it on a PCB, its just not going to work with what I can produce at home). I'm currently waiting for bitcoin difficulty to explode sufficiently to pick up some LX150 boards cheaply to play with for my Litecoin project, though the ISE license will be a problem (only 30 days evaluation, and a full license costs an arm and a leg). If anyone's got a Ztex LX75 board going cheap I'd be interested to hear from you  Kiss

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dani
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August 08, 2013, 09:07:32 PM


to get back to that sweet idea, I build a small setup with 4 fans, sadly different in power, speed etc

here you can see the fans


the upper left is really powerful, alot more than the others

built this



fired it up



what can I say: it works, but the setup is not good for comparison. The entry is 24x24 cm and the exit is 8x8cm.
A1*c1 = A2*c2 -> c2 = A1/A2*c1 = 9*c1.
So one would expect the air to flow 9 times as fast as it does at the entry. It doesn't, its actually kinda lame. The powerful fan just pushed the air right out of the weakest of my fans (yeah, who would have thought that?  Roll Eyes ). I think when letting the fans suck the air out I would not get that effect of air moving the wrong direction, or maybe not that bad. Maybe I should try this with just one fan, doing the same in a smaller scale or get 4 equal fans.

Any thoughts? Smiley

Edit: The fans are pushing the air into the narrowing tunnel, so the output is the small end. I didnt make the middle (constant) section nor the output (widening) part, I thought this would not make a difference or have a positive effect. I might be wrong

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August 08, 2013, 09:14:40 PM

I love going back and looking at all the awesome GPU operations people had going in the early days. They may have been big but they looked so damn awesome.

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August 08, 2013, 09:48:20 PM

Update!

I recently ordered some new USB Erupters, so I got me another 10-port Anker hub and taped them together with some sturdy industry grade double adhesive tape. I also moved up the power bricks so they get some of the side winds from the fan. I am expecting another 6 erupters so I'll have a total of 18.

Previous post about this rig:
https://bitcointalk.org/index.php?topic=7216.msg2801722#msg2801722






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August 08, 2013, 09:58:49 PM


to get back to that sweet idea, I build a small setup with 4 fans, sadly different in power, speed etc

here you can see the fans

http://i.imgur.com/Qji5V1p.jpg
the upper left is really powerful, alot more than the others

built this

http://i.imgur.com/jmr1ZcO.jpg

fired it up

http://i.imgur.com/jTWBUcy.jpg

what can I say: it works, but the setup is not good for comparison. The entry is 24x24 cm and the exit is 8x8cm.
A1*c1 = A2*c2 -> c2 = A1/A2*c1 = 9*c1.
So one would expect the air to flow 9 times as fast as it does at the entry. It doesn't, its actually kinda lame. The powerful fan just pushed the air right out of the weakest of my fans (yeah, who would have thought that?  Roll Eyes ). I think when letting the fans suck the air out I would not get that effect of air moving the wrong direction, or maybe not that bad. Maybe I should try this with just one fan, doing the same in a smaller scale or get 4 equal fans.

Any thoughts? Smiley

Yay!!!
You made it!!!
I'll PM you, but shouldn't the output be larger than the input (the other way around?)? And where is it pointing to?

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dani
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August 08, 2013, 10:11:25 PM


to get back to that sweet idea, I build a small setup with 4 fans, sadly different in power, speed etc

here you can see the fans

http://i.imgur.com/Qji5V1p.jpg
the upper left is really powerful, alot more than the others

built this

http://i.imgur.com/jmr1ZcO.jpg

fired it up

http://i.imgur.com/jTWBUcy.jpg

what can I say: it works, but the setup is not good for comparison. The entry is 24x24 cm and the exit is 8x8cm.
A1*c1 = A2*c2 -> c2 = A1/A2*c1 = 9*c1.
So one would expect the air to flow 9 times as fast as it does at the entry. It doesn't, its actually kinda lame. The powerful fan just pushed the air right out of the weakest of my fans (yeah, who would have thought that?  Roll Eyes ). I think when letting the fans suck the air out I would not get that effect of air moving the wrong direction, or maybe not that bad. Maybe I should try this with just one fan, doing the same in a smaller scale or get 4 equal fans.

Any thoughts? Smiley

Yay!!!
You made it!!!
I'll PM you, but shouldn't the output be larger than the input (the other way around?)? And where is it pointing to?

finally a prototype Smiley The fans are pointing in the direction of the tunnel (pushing air in), fixed my post Smiley

Hai
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August 08, 2013, 11:55:05 PM

Can I play the big fan game too?  Shocked

It needs to run off a car battery jump-starter (600 A peak current) because none of my bench PSU could handle it. It needs about 200 watts or more. Even my small desktop PC ATX PSUs were no match.

I made a bag thing out of a painters dropsheet to show how much air it moves.

http://www.youtube.com/watch?v=ihvaFVsB4G8


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Cablez
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August 09, 2013, 12:50:59 AM

What is your plan for that monster?!?

Tired of substandard power distribution in your ASIC setup???   Chris' Custom Cablez will get you sorted out right!  No job too hard so PM me for a quote
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August 09, 2013, 12:53:33 AM

I made a bag thing out of a painters dropsheet to show how much air it moves.
http://www.youtube.com/watch?v=ihvaFVsB4G8

 Haha ! That's AWESOME. Thanks for posting the video.
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August 09, 2013, 12:54:36 AM

I made a bag thing out of a painters dropsheet to show how much air it moves.
http://www.youtube.com/watch?v=ihvaFVsB4G8

lolololololololol

freakin' awesome

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August 09, 2013, 02:00:10 AM

Quote
I made a bag thing out of a painters dropsheet to show how much air it moves.

http://www.youtube.com/watch?v=ihvaFVsB4G8

That was TOTALLY entertaining! Looks/sounds to be on par with a leaf blower!

What's the purpose? I'm guessing you may be limited to DC power...or just had a lot of fans you wanted to put to use?

I always love this pics thread  Cheesy

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August 09, 2013, 03:09:19 AM

That fan set up is impressive!  Never thought it would go so fast!
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August 09, 2013, 03:23:14 AM

I made a bag thing out of a painters dropsheet to show how much air it moves.
http://www.youtube.com/watch?v=ihvaFVsB4G8

Your hands don't match with your face. Embarrassed

Video was really entertaining, though, congrats!

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August 09, 2013, 04:12:09 AM

Bwahaha! That vid was awesome. Nerds and their toys...  Roll Eyes

However, I hate to burst your bubble, but it's already been done before.

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August 09, 2013, 04:37:19 AM


Any thoughts? Smiley


crazy but nice Cheesy

you could also try a bigger fan, like this:

http://www.caseking.de/shop/catalog/Luefter/Ueber-140mm-Luefter/BitFenix-Spectre-PRO-230mm-Luefter-schwarz::17899.html

230mm diameter, circular case, 264,0 m/h airflow.

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August 09, 2013, 07:23:48 AM

Have you tried the same experiment with just one of the fans? AFAIK the fact that there are 12 shouldnt be that much of an improvement due to teh first fan being the only fan that intakes air - how about thrying it with them paralell instead of in series Wink

I have 15 of these delta 120s - 252CFM - lovely for shifting air BUT too loud for continuos use (unless its in a server room) i have 12 pulling air in my server cab and 3 to 'play' with Wink

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August 09, 2013, 08:11:12 AM

I have 15 of these delta 120s - 252CFM - lovely for shifting air BUT too loud for continuos use (unless its in a server room) i have 12 pulling air in my server cab and 3 to 'play' with Wink

I have a couple of those and they are just insanely powerful: http://www.youtube.com/watch?v=kDOSaPULFro
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