Pictures of your mining rigs!

[Jay_Pal]

In Jalapeno cold air is pulled from the below intake , pushed upwards and vented through the upper exaust.

Sorry to ask, but are you sure?
I've read everywhere that it is not the case.

Even a few posts ago in this topic:

Flash those suckers to 8GH/s and then tell us what the temps are! 

Still trying to get that Atmel AVR Dragon. It's not quite accessible here in singapore...

looks like a £1 notebook cooler underneath those bad boys i assume its blowing down?

Good eyesight but it's suppose to blow upwards instead. Didn't switch that on because RPi doesn't have enough power once I plug that in...

wont it end up fighting the fans blowing air down? or are you trying to get it to blow the cooler air from underneath upwards?

i have one blowing over my USB ASICs atm

[1714026249]

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[1714026249]

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[philips]

I have 9 Japs to testify.

Is interesting that so far I've seen several posts (including yours) arguing about both methods (fan blowing down VS fan blowing up) and claiming that the opposite method is the wrong one.
I remember this one for example: https://bitcointalk.org/index.php?topic=221413.msg2335576#msg2335576

I think is safe to say that BFL done their fair share of tests with both methods and decided to go with the best one.

I might test it myself, but I don't really want to stop them hashing right now, and besides, they are all below 40C with the case on.

[Trillium]

Wine coolers or refrigerators are not build for that. The Compressor will (constantly) overheat and then die ....

That's right.
But let's stop and think for a while:
I've seen very stupid cooling solutions, including BFL's take on that matter.
It's quite well known that cool air is heavier than hot air.
Hot air always flows naturally upwards.
The Jalapeño pushes cold air from the top and pushes it downwards to the other side's venting.
But that's not even close to smart...
When my Jalapeño arrives, I intend to remove the case (and fan, possibly) and create a vertical wind tunnel with two cones, to create a Venturi effect on the heat sink.

The fan will move to the top cone, forcing the air out or to the bottom cone, forcing the air in (haven't decide or tested yet).
If possible, I'll have the hot air exhaust to the exterior using an H pipe chimney:

I think this is going to be one of those 'sounds better in theory' kind of things. Still give it a go and report back with pics of your crazy creation, of course! I suspect that the restriction of flow from the pipe head alone will cancel out most of the hot buoyant air effect you are trying to exploit. I would confidently say that it WILL have some airflow but the question becomes "is it sufficient?".

I am not sure about the H-chimney design, I think the two 90 degree bends the flow would have to make would limit the momentum and flow rate of the rising air. I would almost bet BTC that a single straight tube of constant diameter would be better.

EDIT: I re-read your idea about putting the fan on it too. I was thinking you meant it would work passively. I suspect you will still find that having this contraption with the fan(s) on top will still be worse than just having the fan next to the heatsink as normal.

Where are all the process engineers / industrial chemists to model this scenario for us??? Do we have to bribe them with BTC lol?

Was this your motivation behind your idea by any chance? http://en.wikipedia.org/wiki/Solar_updraft_tower

[Jay_Pal]

Hi Trillian!! Nice to hear from you!
Have you seen Zaphod?

I think this is going to be one of those 'sounds better in theory' kind of things. Still give it a go and report back with pics of your crazy creation, of course! I suspect that the restriction of flow from the pipe head alone will cancel out most of the hot buoyant air effect you are trying to exploit. I would confidently say that it WILL have some airflow but the question becomes "is it sufficient?".

Yes, the last question is the right point.
One of the properties of the Venturis effect is exactly the thermal properties of the low pressure and air flow acceleration.
In short, by accelerating the air on the constriction, the pressure drops making it more permeable to absorb heat.
You see this effect exactly on any Kelvin's refrigeration cycle where you compress the gas (R14, R15, R134a, etc) before it reaches the condenser pressurized, absorbing the heat inside the chamber. When it expands it cools down but the thermal energy is still the same, so we need the radiator.
Since I'm going to use air, the properties are quite a lot different, specially on the Thermal Capacitance side, but the principle remains.
So that's the correct question: is it sufficient? (for a sneak peak, see the link in end of this post :p)

I am not sure about the H-chimney design, I think the two 90 degree bends the flow would have to make would limit the momentum and flow rate of the rising air. I would almost bet BTC that a single straight tube of constant diameter would be better.

The H is to be put in the house exterior.
We use them quite a lot here in our houses chimneys because it has two advantages: the Venturi effect (again) sucking the flow from inside the pipe and no water in.

The H is mounted vertically.
The one I showed is for vertical mount but there are others for wall mount.

EDIT: I re-read your idea about putting the fan on it too. I was thinking you meant it would work passively. I suspect you will still find that having this contraption with the fan(s) on top will still be worse than just having the fan next to the heat sink as normal.

The fan is just to accelerate the air flow, somehow, not sure if in the intake or in the exhaust.

Where are all the process engineers / industrial chemists to model this scenario for us??? Do we have to bribe them with BTC lol?

I never finished university in Mechanics Engineering but it was a problem with maths and some Vapor Pressure charts in Thermodynamics :-p But hey! Here I am!! Just don't ask me to put some math on this.. I'd fail providing reliable numbers... :-(

Was this your motivation behind your idea by any chance? http://en.wikipedia.org/wiki/Solar_updraft_tower

No, it wasn't, but nice to acknowledge something new!

My motivation was this:

http://www.extremetech.com/extreme/144731-the-wind-tunnel-computer-that-hopes-to-conquer-cancer
The difference?
This is horizontal and I want to have it vertical.

[hendo420]

Considering the size of the bfl units I could easily design and 3D print the ducting needed for this.

[crazyates]

In Jalapeno cold air is pulled from the below intake , pushed upwards and vented through the upper exaust.

Sorry to ask, but are you sure?
I've read everywhere that it is not the case.

Ya, my Jalapeno's fan was blowing air upwards, pulling air thru the heatsink.


Side View:

    |=============
    |           /-------->----> 
    |        FAN          |
    |     HEATSINK     |
    |       /               |
--->----/ CHIP         |
    ==============

[Jay_Pal]

Considering the size of the bfl units I could easily design and 3D print the ducting needed for this.

You'll never imagine how I'd love to have money to buy a 3d printer...!!!
But I'll start by rapid prototyping in the old fashioned cardboard and MacGuiver's duct tape!

In Jalapeno cold air is pulled from the below intake , pushed upwards and vented through the upper exaust.

Sorry to ask, but are you sure?
I've read everywhere that it is not the case.

Ya, my Jalapeno's fan was blowing air upwards, pulling air thru the heatsink.


Side View:

    |=============
    |           /-------->----> 
    |        FAN          |
    |     HEATSINK     |
    |       /               |
--->----/ CHIP         |
    ==============

Nice then!!! Even so, I'll try to cool it a little more!

[philips]

Creating special cooling devices for Jalapenos seems overkill to me.
As long as you keep them in a proper place they stay cool enough.
The ones I keep still in their cases are barely warm (40c), while those without cases are practically cold to touch (35-37C).
Sure, place them in the wrong place and they will soon overheat.

However, Inaba said at one point:

I would be very interested to see a water block that covers chips, 1850 and mosfets.  I think it would change the nature of performance quite a bit and it's been something I've been itching to try, but haven't had any time to even start on some sort of project like that.

I have cooled the mosfets and 1850 with a block of ice and it does increase stability, but it was pretty ghetto, so doing a proper coverage WB would probably yield even better results.

[CoinHoarder]

My latest rig:
- 2000 Kh Litecoin (2 5970s and 1 5850)
- 29 Gh Bitcioin (about 84 ASICMINER Block Erupters)

Already sold half of my Block Erupters pictured above... I only got to mine on most of them for half a day. My fingers still hurt from opening/closing 80+ ASICMINER gift boxes, then taking it out of the bag, then opening the case, then prying the miner out... geeez. Then putting them back together.. don't get me started, I feel sorry for the people in China that assemble the packaging.

Not to mention all the USB COM port conflicts and Windows making me try every which way to hook the USB hubs together until all the sudden in magically worked. I'd suggest only chaining a maximum of 2-3 hubs before starting a new chain straight out of the motherboard/pcie usb expansion ports. I did eventually get all 84 USB miners recognized and mining 330+ Mh each.

I'm going to miss those guys..  

But when I can sell them for $145+ on Ebay a piece and with Bitcoin being down right now in value, I'd be silly not to just sell them now and be happy with that and reinvest back into good ole BTC.

I'm auctioning off 10 miners and an Anker USB hub here on the forums by the way, it ships Friday! https://bitcointalk.org/index.php?topic=249179.0

[Trillium]

Those are some sexy hubs. Shame they are not available where I live. How much did you pay for them?

[sololoop]

Herewith is my GPU rigs farm evolution :

Tester rig:


Miner 1.0 :


Miner 2.0:


small farm (pretty hot):

night view:


Cooler farm:


GPU train :

[Trillium]

Ziptie manufacturers and investors must love you.

[crazyates]

Herewith is my GPU rigs farm evolution :

Tester rig:
[img ]http://imageshack.us/a/img211/5671/20130428134747.jpg[/img]

Miner 1.0 :
[img ]http://imageshack.us/a/img23/5434/20130428211202.jpg[/img]

Miner 2.0:
[img ]http://imageshack.us/a/img841/3172/92040117.jpg[/img]

small farm (pretty hot):
[img ]http://imageshack.us/a/img6/7360/69021294.jpg[/img]
night view:
[img ]http://imageshack.us/a/img546/8905/20130611025206.jpg[/img]

Cooler farm:
[img ]http://imageshack.us/a/img23/6201/75369288.jpg[/img]

GPU train :
[img ]http://imageshack.us/a/img32/2609/vk5u.jpg[/img]

I saw the first pic, and was like "Oh God, not another throw-my-crap-on-a-chair and suddenly you're a bitcoin miner!". But actually that's a nice, clean setup!

Ziptie manufacturers and investors must love you.

If you're building a large rig and you DON"T have a bag of at least 1,000 zipties, you're doing it wrong.

[hotwired007]

Herewith is my GPU rigs farm evolution :

Tester rig:
[img ]http://imageshack.us/a/img211/5671/20130428134747.jpg[/img]

Miner 1.0 :
[img ]http://imageshack.us/a/img23/5434/20130428211202.jpg[/img]

Miner 2.0:
[img ]http://imageshack.us/a/img841/3172/92040117.jpg[/img]

small farm (pretty hot):
[img ]http://imageshack.us/a/img6/7360/69021294.jpg[/img]
night view:
[img ]http://imageshack.us/a/img546/8905/20130611025206.jpg[/img]

Cooler farm:
[img ]http://imageshack.us/a/img23/6201/75369288.jpg[/img]

GPU train :
[img ]http://imageshack.us/a/img32/2609/vk5u.jpg[/img]

I saw the first pic, and was like "Oh God, not another throw-my-crap-on-a-chair and suddenly you're a bitcoin miner!". But actually that's a nice, clean setup!

Ziptie manufacturers and investors must love you.

If you're building a large rig and you DON"T have a bag of at least 1,000 zipties, you're doing it wrong.

Mmmm 7970s

BTW - what way do those fans blow are they sucking or blowing into the GPUs?

[ElitePork]

Looking for these? A vertical wind heat sink
http://www.farnell.com/datasheets/17642.pdf


For those who asked whether the fans within Jalapenos are blowing upwards or downwards, it's upwards in the original package. I have removed the casting and flipped the fan to blow downwards.

I agreed that BFL might have tested both way and decided that blowing upwards is the best way but this is with the constraints of the casting. So without the casting, i think it's better to blow downwards.

[Jay_Pal]

Looking for these? A vertical wind heat sink
http://www.farnell.com/datasheets/17642.pdf


For those who asked whether the fans within Jalapenos are blowing upwards or downwards, it's upwards in the original package. I have removed the casting and flipped the fan to blow downwards.

I agreed that BFL might have tested both way and decided that blowing upwards is the best way but this is with the constraints of the casting. So without the casting, i think it's better to blow downwards.

Oh! So that's the secret!!! Turning the fan! :-)
Thanks!

[philips]

Looking for these? A vertical wind heat sink
http://www.farnell.com/datasheets/17642.pdf


For those who asked whether the fans within Jalapenos are blowing upwards or downwards, it's upwards in the original package. I have removed the casting and flipped the fan to blow downwards.

I agreed that BFL might have tested both way and decided that blowing upwards is the best way but this is with the constraints of the casting. So without the casting, i think it's better to blow downwards.

What do you mean they might have tested both ways? Do you think they flipped the coin and decided to go with fan upwards on a whim?

[CoinHoarder]

Those are some sexy hubs. Shame they are not available where I live. How much did you pay for them?

Thanks.

They were about $53 on Amazon. Kind of pricey, but it's the only hub I could find that would run 10.

[CoinHoarder]

If you're building a large rig and you DON"T have a bag of at least 1,000 zipties, you're doing it wrong.

So true lol. I keep a stock pile of Zip ties around in case I get in the mood to do a little rearranging/house cleaning. I think every GPU in my farm has at least 2-3 zip ties each in some shape, form, or fashion.

[Jay_Pal]

If you're building a large rig and you DON"T have a bag of at least 1,000 zipties, you're doing it wrong.

So true lol. I keep a stock pile of Zip ties around in case I get in the mood to do a little rearranging/house cleaning. I think every GPU in my farm has at least 2-3 zip ties each in some shape, form, or fashion.

Forget zip ties...

If this doesn't solve it, than nothing will.