Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 640. (Read 1260389 times)

http://bitcoin.sipa.be

That first 'moonshot' graph is pretty impressive ...

We're working hard to sell all August in advance.

Will post this once again: http://bitcoin.sipa.be/growth.png

With current hardware capabilities, the hash-rate growth is slowing down.

well i did not get any of these units...in a prev post even with the group order deal and 10 percent off due to prev knc purchases...at 440 usd coin
47% difficulty and 15c kwh elec and the 'hopeful' 6.5Th it essentially broke even...ie I'd get the same coin if I bought vs what I'd get out...not to
mention at 2500 watts likely would have to kick up the 100 amp service in the house to 200 amp..er again this would have been at a $4495 usd price
including shipping

my point is thou it is interesting ..that their hosting of equip is more or less exactly what I would pay (from what i can figure) in Minnesota...

electricity to run the beastie

so anyway if there is a way in the future to justify getting one of these beasts vs just getting coin I will consider it...likely it would have to be

another 'group order' which I've seen none mentioned....

anyway....hosting my equip looks like maybe a wash either way.....same $$$ assuming my 100amp could take 1 2500w 24/7..heh

(er cooling crap i forgot cooling)

still fence sitting but interested

Searing

I wouldn't recommend anyone to do a DYI immersion cooling with 3M Novec. Too complex and too dangerous.
Arguably, it might make sense on large scale.

Find cheap hosting deal instead. There are a lot of options available online. Our miners software is suitable for remote management via HTTPS.

I can't imagine letting one SP10 running around me. If you put it on your balcony, the neighborhood will hate you.

I did not say that 4x SP30 with 12kw heat generated cannot work in a room OR in a closet without having to spend many thousands of dollars to keep it cool and NOT use direct ventilation from outside.

In my opinion, such a case must not work within a house, it should be done outside with direct massive ventilation. That was a reason I suggested to build a small kiosk and let it work OUTSIDE. Not inside a closet within a closed room.

Where do you disagree?

I agree that large scale is cheaper per kw than small scale but I don't think the difference is so huge.

I think the only significant factor is the bulk discounts especially on the liquid but the fluid is $200/gallon in bulk not $400.

Pumps ($50), fans ($100), radiators($300), and plastic tubs ($50) are all relatively cheap. I would guess that a pressure control system would require ~$100 worth of parts and pluming maybe another $100. So overall less than $1000 before adding the novec costs.

-Bulk quantities of liquid are way cheaper.

-A small tank is more expensive per volume created than a bigger one

-You need to build a custome lid with air pressure control and access for the water cooled condensers

-You need to build a water cooled chiller and install it in a safe and secure way in your tank.

-The radiator for the chiller needs to be built into an existing structure, i.e. your building in a safe and secure manner and some kind of fan mechanism might be needed
 One time costs of this are far higher per W when only a small radiator is installed.

-A water pump for pumping your water to the outside will need to be installed. Big pumps are way less expensive / waterflow than small ones

-Labor on a small project is far more expensive per kw than on a bigger build.

-Bulk materials purchase is far cheaper per kw cooling in a big build


I could go on. Please admit that building a small immersion cooling rig is far more expensive per kw than a big one.

The whole point behind cheap immersion cooling is to from the start design boards for immersion cooling, which will be cheaper than regular units as you dont need to buy and install heatsinks and fans.
Additionally you can put a higher amount of chips on the boards, as you dont have to think about cooling layout etc.

The savings from board / heatsink / fan costs and the labour installing those is then put into ~200cc fluids per kW, this apparently costs around the same.

Further savings are then achieved by lower maintenance costs, as you can "build" your own custom datacenter by just buying a shipping container for around 700K from Allied Control.
All you then need to do is hook up around 1,4MW of power and you are ready to go. No costs wasted on racks in datacenters etc, only electricity costs and small internet fees.

When it is time to upgrade your gear, the real cost savings come through as liquid and tanks etc. are already installed and you can just switch out the boards.

Why would the cost not scale down? Whats preventing you from having the same gallon/kw ratio with a 10kw tub vs a 250kw tub?

Lets put it this way:
Unless you are trying to cool a whole 250kw Tank with Novec and 2-phase immersion cooling, it doesn´t make any financial sense.

The only reason why immersion cooling is cheaper than air cooling ist because of scale. When you put many units into these tanks, less liquid is needed and at some point the liquid becomes cheaper than buying heatsinks and fans for your units.

However, the liquid only transports the heat away from the chips / boards. It still needs to get extracted from the tanks.
Thats where the radiators come in, which are very efficient especially in warmer climates (compared to the normal cooling costs there) as the fluids in these radiators only need to circle slowly and can easily be cooled.

Building a home 2-phase immersion cooling rig isn´t worth the effort imo as it will always be more expensive vs air cooling.

My recommendation: Just put your unit in a DC, thats what they are built for anyway.

Aren't we all? Or do you know of a way to cool 10kw with no setup cost, expensive materials and knowledge?


This is exactly what I am saying. Because 30% savings on electricity costs alone is not bad.


No I don't think it is easy but it is not nearly as difficult as you make it out to be. But cost wise it is practical.


Yes along with a fan. With proper testing and a pressure control system there should be no problem with pressure.


What low cost/short term solution do you recommend?

Being feasible, are you done dreaming?

You're talking about a custom cooling setup that requires setup cost, expensive materials and knowledge.

Put it this way, someone want to make his car more efficient and fuel economical. He plans to do some weight deduction and air intake. You come in and tell him to rig it off , put an electrical motor and build a plug-in hybrid.

Lets assume cost is not a concern, you think its easy?

10kW of heat is still 10kW of heat no matter what type of cooling you're using. You think the poster would be able to know what kind of heatpump he'd need? You think making an immersion tank is cheap and easy? Sure, just use a radiator and a pump right? until his tank pressure build up.

Its not a setup for 3 SP30s due to high setup cost and certainly not for someone whos not sure if they would mine long term. The AC can be re-purposed while your fancy setup would be a write off.

We all know you're awesome with "immersion setup" lets get back to reality ok?

What exactly is your point?

Or you can dump it to the ground..... you completely missed the point.

You can just pump the heated water to an outdoor radiator+fan. No expensive and power hungry AC necessary.

Dude, you compare 2 completely different scenarios. The whole point of using split system is because ..... you dont have ventilation !!!! Gee...

If you can vent air to exchange with the outside then, A/C doesnt help much.

I believe the poster want to use closet. Last time i check my closet doesnt have windows or balcony.

LOL Novec isnt magic liquid   Its still just a medium of heat exchange. You have to dump those heat somewhere.

Dont be confused because Novec can conduct heat every well hence the advantage is DENSITY and EFFICIENCY, not cooling.

You need a heat pump to remove heat.

So you dont compare just the cost of Novec to the cost of A/C.

AC is a heat pump while to using AIR to conduct heat (air circulation in the room)

A correct comparison would be $500-750 vs $0 (air is free)

You can buy it directly from 3m. It is almost as easy as submerging the miners. If you use 2 phase evaporative cooling you would need a condenser and pressure control system (so the system can safely breath without exploding or losing vapor).

Just saw that too.
GREAT write up for SP-TECH!!!

I HOPE all the BFL customers saw this, got refunds, and move to SP-TECH for future orders.
Im counting the days till my SP10 order ships.  Never been so excited!!!

I'm trying to weigh all my options right now.

1. 36,000 BTU mini split AC unit ~$3,000
2. Polyurethane kiosk (whatever that means) with some large industrial fans.  //I need more info on this.  What size would the kiosk be? what would be the estimated cost of building something like this? 
3. Novec Immersion Cooling.  //Need more info on this.  Where do I buy this liquid? do you just submerge the miner in it??