[Work in progess] Burnins Avalon Chip to mining board service

[Schrankwand]

Alright, that makes sense.

Here comes the next question: How does water temperature in the end relate to chip temperatures?


Lets say I have a graphics card dissipating 400w and the water goes from ambient temperatur of 25° to 35°. How is that reflected on my GPU chip? Or Avalon Chip for the matter...

[madmax_ger]

I have 40 chips ordered, so there will only be 2 Bitburner XX for me.
A watercooling setup would be a very small one, seems like this doesnt make sense.

Will I be able to cool them by air well enough for OC or is watercooling required then?
Any idea yet?

[tigerbit]

Follow on question for the 16 board example:

Connections?

Is a manifold required either side of the boards?  Else board number 16 in the chain will be getting some warm water cooling!

Radiators llike the Mora have 3 inputs. How should the loops be best designed to make most efficient cooling.  A simple chain of 16 boards sounds like a really bad idea.

[fiktionist]

Follow on question for the 16 board example:

Connections?

Is a manifold required either side of the boards?  Else board number 16 in the chain will be getting some warm water cooling!

Radiators llike the Mora have 3 inputs. How should the loops be best designed to make most efficient cooling.  A simple chain of 16 boards sounds like a really bad idea.

thats not correct. the difference in watertemp. at the 3rd and the 16th board is too low to make any difference.

And besides that, my mora just has 2 G1/4. One Inlet and one outlet.

[tigerbit]

Follow on question for the 16 board example:

Connections?

Is a manifold required either side of the boards?  Else board number 16 in the chain will be getting some warm water cooling!

Radiators llike the Mora have 3 inputs. How should the loops be best designed to make most efficient cooling.  A simple chain of 16 boards sounds like a really bad idea.

thats not correct. the difference in watertemp. at the 3rd and the 16th board is too low to make any difference.

And besides that, my mora just has 2 G1/4. One Inlet and one outlet.

That's good to hear.  I think new Moras have multiple connections, but if the difference in a chain of boards is negligible and it's possible to run a simple single loop chain, nothing to worry about.  I just thought the cooLing water entering the last board in chain had already had over 1kWh of heat dumped into it, but if you tell me this isn't a problem then great!

[Sophokles]

damn looks nice... But how do the boards attach onto the waterblock... 5 screws on each board, screwing onto the same location on the waterblock....

Also are the waterblock G 1/4 threads? Would love to use my own fittings...


Danny

Of course we use G 1/4" threads

You will also be able to order the waterblocks over our homepage (anfi-tec.de) but then you have to pay twice the shipping cost and you have to attach the cooler yourself.

@schrankwand yes that is right. ~95% of the heat will be emit in the water.


About the radiator size:

When you use a tripple Radiator (3*120Fans)  you have round about ~0,025°C/w  = - that means per 100w the watertemperatur will rise 2,5°C.
If you use a Mora (or 3 Tripple radi) radiator you have round about ~0,008°C/w - that means per 100w the watertemperatur will rise 0,8°C.

here is a short upscaling example:

Tripple radi and 16 Boards @40w =640w -> 0,025°C/w * 640w = 16°C watertemperatur over Air Temperatur. with a 3 trippleradis = 5,3°C
Tripple radi and 16 Boards @80w =1280w -> 0,025°C/w * 1280w = 32°C watertemperatur over Air Temperatur. with 3 trippleradis = 10,6°C


no guarantee for these examples!

Regards Finn

Hi,
thanks for the examples. One variable in the equation was not discussed yet: flow rate.

What is the minimum flow rate for your examples?
What pump would you suggest?
For pumps, the maximum flow rate is usually given. How would the flow rate change with a radiator attached?
How much would 16 or even 48 boards decrease the flow rate? Is there some formula to make estimations?

[dani]

Also at what fan speeds was your example? I guess around 1500 rpm, not something silent which i prefer (800 or so)

[SebastianJu]

Intriguing.  Looks very nice.

Couple of questions:

can the boards still stack easily with this back to back cooler arrangement?

can someone with some watercooling experience give me an idea of the BOM to cool 12 boards?
12x80 = 960W

It seems like a great idea but I'm worried it will prove expensive when you add in radiators, pumps, fans, reservoirs.  Is this going to need £300 investment on top of the cooling blocks?

it honestly all depends on the waterblock price and number of boards your going to get..

Double 120mm Radiator - 100$
Pump - 80$ (Laing D5)
2 - 120mm Fans - 40$ (High static Pressure Fans) or 80$ if push pull config
Reservoir - 50 bucks
Fittings and Hoses - Depending on how many waterblocks you have, your looking at 2-5 dollars per fitting.. 6 boards is 12 fittings, plus 6 for pump, rad, reservoir.. These are the cheap fittings too.. If you get like nice fittings like monsoon your looking at 5-6 bucks EACH... 20 fittings would be 120 bucks alone...
Fluids - Distilled water or special additive. 20 bucks.

Can you translate this into cost per miner? For example "Watercooling a bitburner XX would cost X more €/$".

[ewibit]

Can you translate this into cost per miner? For example "Watercooling a bitburner XX would cost X more €/$".

+1

[g83]

hope that burnin can provide us with a complete watercooled plugandplay setup

[pitchbend]

Burnin, you said you will give us 24h notice prior to website opening. We will also need to have price quotes for all the accessories (cables, psu, watercooler solution etc.) before you open the website so we can make our calculations to have the required funds ready.

[fiktionist]

Intriguing.  Looks very nice.

Couple of questions:

can the boards still stack easily with this back to back cooler arrangement?

can someone with some watercooling experience give me an idea of the BOM to cool 12 boards?
12x80 = 960W

It seems like a great idea but I'm worried it will prove expensive when you add in radiators, pumps, fans, reservoirs.  Is this going to need £300 investment on top of the cooling blocks?

it honestly all depends on the waterblock price and number of boards your going to get..

Can you translate this into cost per miner? For example "Watercooling a bitburner XX would cost X more €/$".

as burnin said earlier, the cooler will be for two bitburners and the price difference between aircooling and watercooling should be at ca. 15euro per board.



simple math.

15€ per Board for the watercooler, 280€ for the watercooling itself.

the more bitburners you cool, the "cheaper" it gets.




Watercooling is nothing for beginners, if you have no clue about it, leave it. One leak can kill your bitburners instantly!

[WynX]

the more bitburners you cool, the "cheaper" it gets.

Are you sure the radiator is able to dissipate that kind of wattage (16 boards all together)?

EDIT: Hmm this thread is talking about 1000W dissipation, so maybe it is doable (depending on the OC of the boards)
http://www.overclock.net/t/1226708/high-end-benchmark-rig-mo-ra3-18-fans-push-pull

You'll just end up with a higher delta T....

[fiktionist]

the more bitburners you cool, the "cheaper" it gets.

Are you sure the radiator is able to dissipate that kind of wattage (16 boards all together)?

it was just a "dummy" configuration. if i would stick to cooling 16 boards with it, i would take the big MORA(slightly more expensive) and two pumps for most performance.

[dani]

Those liang pumps cost around 70 bucks, why not use an eheim compact 1000? It provides double the flow at around 20 bucks each, plus you can put it into a bucket where it will be quiet?

[fiktionist]

Those liang pumps cost around 70 bucks, why not use an eheim compact 1000? It provides double the flow at around 20 bucks each, plus you can put it into a bucket where it will be quiet?

the problem with the eheim is the fact, that it doesnt work very well if there are very restrictive coolers in the chain. since you will have 8 coolers and a big fat radiator, thats going to be very restrictive, so the laing is the better choice because it has simply more "pressure".

[dani]

Those liang pumps cost around 70 bucks, why not use an eheim compact 1000? It provides double the flow at around 20 bucks each, plus you can put it into a bucket where it will be quiet?

the problem with the eheim is the fact, that it doesnt work very well if there are very restrictive coolers in the chain. since you will have 8 coolers and a big fat radiator, thats going to be very restrictive, so the laing is the better choice because it has simply more "pressure".

I didn't consider that, thanks. Any other pumps running on 230V that you can recommend? I don't want to hook up more on my PSU, plus I think those 12V pumps are more expensive than 230V ones that are widely available for aquariums etc.

Any recommendations on a silent, powerful (and cheaper) 230V/12V pump? Anyone?

[f.baasch75]

what do think about this radiator?

http://www.ebay.de/itm/KUHLER-WASSERKUHLER-OPEL-CORSA-B-1-0-1-2-/370838293132?pt=DE_Autoteile&fits=Make%3AOpel&hash=item5657af4a8c

it is much cheaper and it can easily be mounted outside the house

[f.baasch75]

maybe this pump will work:
http://geizhals.de/eheim-universal-1250-790-vollkeramik-a397389.html?plz=&t=v&va=b&vl=de&v=e#filterform

1200 L per hour

[fiktionist]

what do think about this radiator?

http://www.ebay.de/itm/KUHLER-WASSERKUHLER-OPEL-CORSA-B-1-0-1-2-/370838293132?pt=DE_Autoteile&fits=Make%3AOpel&hash=item5657af4a8c

it is much cheaper and it can easily be mounted outside the house

car/industrial radiators are optimized for high airflow, so if you dont have a high airflow, its not working so well ... PLUS you have to get g1/4 fittings on it somehow ...


@eheim1250, same problem with the eheim compact, those pumps are not suited very well for so many coolers ... the only pump suited well for this kind of job i can recommend is the laing ddc (plus).