Looks to be confirmed by DyslexicZombei

https://bitcointalk.org/index.php?topic=335145.msg4844701#msg4844701

I'd buy it if it were shaped like a donut.

He's probably looking at the efficiency of an electric water heater vs the cost of shipping that much mass across five time zones/Atlantic ocean. Wherein it'd cost pretty much the same to heat water at $0.45 in Ohio, palletize it and send it the several thousand miles to a British man in need of a shower (or tea?), as it would for said British man to heat the water locally using the same equipment at a much higher power cost.

Which... that's an interesting way of looking at power cost distributions.

I think we've still got about 20 of Novak's USB adapters on hand. Is AM sending USB adapters with the new Prismas, or just BE controllers, or neither?

Just a note on that distinction, because Bitmain has never made a miner that didn't fit a home-mining market, and before the SP20 Spondoolies never made a miner that did.

Depending on the model of Dell 1200, it might not take much to set you up with a good interface. We have all kinds of stuff for the 750s. Sure, drop a line.

Do the BE controllers suck less this time? Power adapter is nice, but non-garbage software would be even better. Solving a five-minute wiring problem is less significant than solving something that's continuously problematic over the entire lifetime of the machine (like a heavily broken/noncompliant stratum implementation, for one).

Technobit gets a 10 on ethics? Has he ever read https://bitcointalk.org/index.php?topic=682105 about the minion boards? Sure it's a bobsag-started thread, but that was just facilitating a group deal which minersource was also a customer of. Technobit's only six months late delivering on probably hundreds of boards (while continuing to do business on other things, make new products while ignoring existing customers...), and minersource probably lost more money on that shaft than anyone else.

Oh yeah, hey there. The official sales thread for the server PSU stuff we build is at https://bitcointalk.org/index.php?topic=940317.0

I'm actually a bit short on the 2000W PSU itself right now but I'm working on finding more sources. I do have plenty of interface boards in stock if you want to test anything out. Feel free to ask questions.

Sorry I can't offer advice on whether to fetch an S5 or SP20, I have neither so I haven't done any comparisons.

To the OP: you might see if you can talk raskul into shipping. He's selling an SP35 from the UK.

https://bitcointalk.org/index.php?topic=941207.0

So Brad had stock and got you hooked up? Good to hear. Enjoy the mining.

Mine arrived today. I haven't fired it up yet, but it's on the shelf lookin' sexy.

Including everything on paid customer orders not yet shipped, and all replacement requests for having shipped broken gear.

Yeah, but... Windows 8.

Gleb - I can verify that they did move from a relatively small Rolla facility directly to Denver. I'm located in Rolla, and found out they were here in town a few days before the move so I saw their facility (with only 400A 240V service) about the 2nd of January while the packup was underway. I don't know if that was the first or second or ninth or whatever location in town, but I know they weren't 90 miles away. For what that's worth.

Yep, that's my board. If you're worried if that's enough for a pair of S3, I've got hosted S3 that have been running two to a supply for months without issue. Last year I had two overclocked S1 on a supply that ran for six months without a problem, and that was around 800W draw.

I've only got a 4-blade, so I'm not really sure how to help much. Does the standard image not support more by default? Maybe novak will be interested in looking into that. He's the software guy. Also I would not mind having all of the hardware you just mentioned, since right now I have none of those things.

I haven't done a whole lot of cross-comparisons there, but I do know forum user tolip_wen runs a lot of DPS-2000bb stuff in load-balance. He likes to put a 2KW load on a pair of coupled 2KW PSUs so they run at 50% load (which is at or near optimal efficiency point) and that gives inbuilt redundancy (as if one PSU kicks, the other can still handle the full load).

In general, staying around half power will get the best efficiency on most any switching power supply. I would also venture to say the DPS-2000 probably has a higher peak efficiency than the 750W, but for supplies in good condition it's probably less than two or three percent on average. At two percent difference (say, 91% vs 93%) and 2KW loading, this translates to a bit under 50W extra continuous draw, so about $3.50 per month extra. That's not terribly significant, but if your utility rates are high (that estimate is around ten cents per KWh) it adds up. Setup time and proper bus wiring add to initial costs as well, more substantially for the many-small-PSUs setup than for the few-large-PSUs setup.

Sometime when I have time I might crank mine down around 0.8, but right now they're still coming out ahead.

Also, I'm hoping to do a full workup on AM Tubes next week.

You could probably fetch some AntMiner S1, or BlackArrow X-1 for under $100. Some S3 are getting close to that price point. Or look into RockMiner gear; they have some smaller miners geared more for beginners in the <$100 range.
Not losing money on hardware in that range might be difficult, with the coin price dropping and power efficiency of competetive gear shifting to 0.5W/GH these days. For four times the money you can get stuff with ten times the hashrate at five times the power draw.

Very likely they just used that socket. I doubt it actually uses PCI signalling and addressing on the backplane. For all the data that's being transferred, the overhead would be ridiculous.