Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 456. (Read 1260350 times)

+1 ...

Long time ago I wrote in this forum about "...POWER wall..." ...if anybody paid attention ...

ZiG

+1

Thanks. Always largely interested in newer hardware since there really isn't much need for further development of code on hardware that is being deprecated/made redundant due to power restrictions. I only have limited regular power and space at home like any other normal person, but I do have access to someone who care remotely host things for me in the usa, though remote access is almost never as good for development as having the hardware in hand.

Just to keep the discussion on topic, there's no doubt that efficiency is becoming the main player and the SP30 would be borderline for regular people's homes for anything more than a single unit, and it's looking less and less likely that hardware (from all manufacturers) will be suited to the home. It's astonishing how much the game has changed in the last year...

Thanks, Zvi.

It should be fine, in 110V the unit should not 'learn'.
You can always 'delete' learning by setting PSU limit back to 1360 watt in case it did - the unit will learn again.
You can also disable learning by setting unit to safe number like 1300 watt.

what you calculate ? i think what you look never be in reality .

Con,

What hardware are you NOT interested in. The reason I ask is that I have good bit of hardware that I have recently pulled from service for lack of space and would be willing to send some your way if you are interested. For example, do you have access to cheap electricity or are you only interested in very efficient hardware? I have hardware, coolers, PSUs and would be happy to send some stuff your way as a gesture of appreciation.

This. Even if appreciations don't feed you we all appreciate your work ckolivas!

Thank you (and jtoomim); that clears things up.

As someone who is almost done building a wind tunnel for hosting around 150 SP30s, I agree. Unless you're buying mining hardware that comes without a heatsink and fan, you'll find it much cheaper to pass the heat from the ASIC to the heatsink to the air instead of from the ASIC to some expensive dielectric liquid to the heatsink to the air.

If you have two cables lying around that can power a standard desktop computer in your country (with one end as C13 -- http://en.wikipedia.org/wiki/IEC_60320#C13.2FC14_coupler), you'll be fine. Spondoolies provides cables with C14 (which couples with C13) on one end and whatever your PSUs need on the other (C13 or C19).

FAQ SP30 PSU

well hell my little post about 'compensation'  put a smile on someones face reading the above..i bet *heh*

(now I wonder how many milliseconds it took to reply YES GOD YES to the above offer.....(just saying) )
(edit: er quess he did not need the above offer....I myself would kill for such an offer....peon that I am...alas no skills)

zowie ..sometimes I post something that actually helps on bitcointalk ....who'd a thunk it?

good for you ..you guys deserve some 'stuff' or 'services' for your efforts to bitcointalk and bitcoin in general

All of us imho appreciate your time and effort even if we don't say it enough...

Searing

Power extension cords are provided, but the customer needs to buy their own power cord for the socket.

You could use such a cord: IEC320 C13 to NEMA 5-15P SJT 13A

You will basically have to see what kind of outlet you are using and adjust your wall end of the power cord accordingly.

Question about the SP30 power supplies: do the SP30 units ship with power cords, or is that up to the customer to provide? If the customer is to provide the cables, what is the plug type on the SP30 PSUs? From the images it appears to be a standard C13/C14 coupler, but can anyone confirm? I haven't been able to find that information on the website.

I agree, you'll be more efficient (regarding the amount of $ you wanna spend) if you build a wind tunnel.

I'd recommend against doing this unless you are 100% sure what you're doing.

The fluids you are using can only be used for single phase cooling which is less than optimal. (Might as well just use mineral oil)

With single phase you miss out on the density, efficiency, and cooling capacity that you would get with 2 phase.

There are really no significant benefits for using single phase immersion cooling. You still need pumps/fans and it's even less efficient than air cooling (without an AC).

take care of the setup needed to maintain full control of the gaz pressure. You don't want to leak any drop of your precious liquid...

HEY question to all

I am wanting to >>immersion cooling <FC-3283  55 gal (750 lb)     $28.60/lb, $21,450.00 each

             3.25 gal (44 lb)       $31.60/lb, $1,390.40 each

             0.75 gal (11 lb)       $36.20/lb, $398.20 each




Novec HFE 7300    55 gal (600 lb)    $23.95/lb, $14,370.00 each

                            3.25 gal (33 lb)      $25.40/lb, $838.20 each

                                 1 gal (12 lb)      $28.25/lb, $339.00 each

going to using 1 of these fluids:

My question is does anybody see a issue in cooling them off this way.

plus side is
dead quite/ less power needed/ no fans needed  / and it does not matter how hot the room is >> save on a/c electric bill

negative cost of fluid
thanks 

Current performance for mine on 122V is 4190 GH/s as reported by miner_gate_arm.

Different buildings are different. Measure each one when every last few % matters. The SP30 in my office typically reports that it's being fed with 122 or 123V.

It turns out that I had been running my SP30 on one 15A circuit and one 20A circuit. We only discovered this when Eric tried to make coffee and the breaker tripped. I was drawing 1376 W, or 11.28 amps. The coffee maker is rated for up to 650 W, or 5.33 amps, making a total of around 17.5 amps on a 15 amp circuit.

This doesn't mean you will always be able to get full performance out of a pair of 15A circuits, but if your voltage is on the high end of the 110-125V spectrum, and if your breaker panel is in a cool room (mine is), you may be able to get away with it. Hooray!

But you'll lose around 300 or 400 GHs of hashrate for being on 120V. Awww....

If your SP30 trips the 15 A circuit breaker when it's configured for full performance, it's very easy to reconfigure it so that it uses a little less power and doesn't trip the breaker. You just change the PSU wattage limit to a lower value. It's even possible to configure each power supply independently, so you could run one PSU on a 20 A circuit at maximum power and the other PSU on a 15 A circuit at (e.g.) 95% max power. Currently, for example, I have my top PSU capped to 1190 W of DC output and my bottom PSU capped to 1170 W of DC output, since the one I have in the bottom seems to overheat more easily.

As for the toggling power systems question: worst case, when you switch back to 230V, you can reset the learning algorithm by changing the power supply power cap.

And as for using the off switch to shut the miner off: there is none. There's also no "off" button on the web UI. As far as I know, you're supposed to just unplug it. Don't worry about corrupting the filesystem; the main one is mounted read-only, which means that corruption due to sudden power loss isn't possible on it. The non-volatile file system only contains configuration data, and is almost never written to, and can be easily recreated.