Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 457. (Read 1260350 times)

Questions to SPtech (Zvi) or anyone else at SPT or btctalk:
1. If Sp-30 is connected for 6 days to 240V, then switched to 120V for a day, then again 6 days on 240V with cycles repeating in perpetuum, how exactly it would affect it's "learned" behavior. Could this even be done?
2. Is throwing the off switch the best way to switch the miner off or it is better to be do so in gui?

Thanks. My point was not about asking for more stuff. I was pointing out it would be a little hypocritical for the hardware manufacturers to gladly give away hardware for the sake of a review which may affect the objectivity of the reviewer, while not supporting the developer who wrote the software they depend on. Fortunately neither of the parties involved here suffer from that as Dogie's reviews remain objective in my opinion, and Spondoolies offered me an SP10.

As for writing free software, I actually put aside and sacrifice some time that I used to work professionally to continue working on cgminer (and other bitcoin software projects) turning it into a part time job, though I have continued to try and incentivise the maintenance of all my projects as free software by charging less for paid code when the source remains with an open license such as GPL, or simply maintaining/updating the existing driver for a once off donation. The core cgminer code I continue developing for free. Driver code I find it hard to write for free when it's used to allow a hardware manufacturer to make bucketloads of profit. I also get paid as much as possible in bitcoin since ultimately I'm here to help the bitcoin ecosphere as much as I'm here to get paid. Yes I'm bitcoin-operated as someone once called me, but only for certain aspects of what I spend time coding.

Thanks for the generous offer. I have no need for that at the moment but I appreciate the offer.

The SW will not work with PSUs it does not recognise on I2C, but that is easy to fix - look at ac2dc.c and ac2dc.h miner-gate code and add your PSU, and compile miner_gate.
Regarding the connectors etc` I have no idea.
Regarding warranty - it will void the warranty.
Regarding heat - the system can handle more heat, especially in cold ambient.
DC2DC also has some head-room in this revision, but maybe not in next revisions of SP30.
The ASIC voltage will have to move higher to the 0.71-0.73 volt area, so you will loose about 10%-20% efficiency.

I would guess that at 4KW one might be able to reach 5.2TH+ in cold room in current corner. Again, there is no warranty on this, and I would not do it and if you burn your house it's not on us

Based on a statement earlier by Zvisha, "AC2DC is the limiting factor of this machine." I interpreted this as the Power Supply is the limiting factor for the SP30. So I thought maybe they choose the PSUs to use based on cost, not on maximizing performance. A business decision, can't spend more on parts that the final sale price allows. There's also the heat dissipation of the cooling design to consider. I would be curious to know how the hash rate ramps up with more power?

We have sent some units from our DC to clients with version 2.2.27 today.
Please do SW upgrade once you get them before you start mining, or it might learn non-optimal PSU settings.

I though the ASICS are at near max power using the 3000WAT , would you not risk frying them with far more juice than is optimal ?

I read on Dogie's SP30 setup guide that the SP30s come with "either 2x Emerson DS1200 or Murata D1U3CS-1300F-12 server PSUs with 34 pin outputs". I found Murata has a 2200w 1U server PSU with 34 pin connector. Could be compatible? But they are not cheap like the Delta...

I didn't change my delivery details , I don't know if it has to do with that since mine says : 'restocked' as well

My orders only show as 'restocked' because I changed the delivery details to a DC.

I would like to hear more details about this?

The question is whether the pin setup is compatible to the PSUs normally shipped within the sp30.

It would obviously not be feasable to attach an adapter (that doesn´t yet exist) to a PSU (that will then no longer fit into the miner housing)

There is this:
http://minersource.net/products/delta-dps2000w-server-power-supply
164A Maximum @ 220v.

Super, thanks, I just don't know about 122V. Typically, it is 115-118V, but i checked my house, and it is, indeed, 121.5-121.8V.

This is on 120V.

There should be around a 3% difference in PSU efficiency vs 240V, and obviously a total of around 10% increased power provided on 240V.

This all works out to the sp30 running at 4.5TH on 3kW of power at 220V+.

Total energy efficiency should be slightly better at lower hashing speeds, but even better on lower speeds and 240V compared to lower speeds and 120V.

I get that (4.1Th at 110/120v), but would you use 2500, 2640 or 3000W at the wall to get there?

You will get around 10% lower hashrate at 120V compared to 240V.

As far as I know you don´t need to do anything fancy to use it on 120V.

Is the info above at 240V or same for 110/120V (for lower Th)?
In other words, if I run Sp-30 on two 15A 110V circuits (ostensibly up to 2640W/24A from both at the wall), what would be the expected hash? do I need to do some mod to remove power limit? I would like this info so I can compare the economic benefit (or lack of it) for hosting vs home.

Update to latest FW.
If it is still restarting when PSU limit is under 1300 (front page) or after 24 hours - contact me.

I do not think that context learning is worth it in terms of stability vs` value.
Those are the most expensive GHs, so even if you have 10C difference, and it translates to 20 watt (1.5%), you will get 0.5% difference (25Gh) - that is not enough to justify the added complexity.
 
But one can do this in cron: create several /etc/mg_custom_rate_xxx files for different time of day and set symbolic link from crone at every few hours (just remember to restart miner_gate after that to reload settings). The system will update relevant file every PSU 'failure', so you should get exactly what you want. But I am not sure restart downtime will pay for itself.

Not that we are aware of. AC2DC is the limiting factor of this machine.