The only reasonable excuse I can think of is BitFury's supply of chips vs fulfilling prior demand for the chips destined as internal usage (for the mobile tanks they say they build/sell) and prior very-large external customer commitments.

IF they are actually producing chips in volume I'd think the back order for chips should be more than enough to keep their Foundry (TSMC) happy with BitFury's monthly order quan. Yes compared to that, Sidehack's chip consumption would be 'small' but still by no means insignificant to BitFury's bottom-line. Throw in the PR value -- Priceless.

Thought about that for the 2 long retied s2's I have...

edit: Oh, a rare tip-o-the Visor to Joshua Zipkin, now aka Joshua Alexander of AMT, for eventually providing that miner to me even if about 6-7mo late. It was 1 of literally a handful that got shipped and worked. Why it lasted so long -- it was built by the same company Innosilicon used for their miners but using A1 chips that Zipkin/AMT had in abundance from the failed (in order of those responsible) Bitmine.ch/AMT/IMET mess.

Detail of nice touch the sinks have:

The main fins have fins. That cheap (is an extrusion after all) touch raises the surface area to 3x a straight-sided fin has.

Side thought: 1st, you are talking about bolt-on boards (to s1/3 sinks) right?
If so, wonder how the boards would fit on s4 sinks?

heh heh, or perhaps strap them onto the heaksinks inside my rare A1 based AMT/Bitmine.ch 1.2THs rig

Finally retired it earlier this year when the s9's came out. It ran trouble-free 24x7x365 since about late Aug. 2014 but sucking in 1.5kw vs what the first s9's have for speed and less power -- had to do it.

Would be nice if they would provide chips in growing batches on-consignment with an extended pay-before-by-date, say 2-3 mo or whatever you work out with BitFury for time needed after chip delivery.

If they could start by sending you enough chips for say 10 or more full-up miners to use for proto/prove out and hopefully sell (I'd buy a working proto) it would be minimal exposure to them and one helluva show of good faith from BitFury.

After that, as you've seen, there IS a sizeable market out there wanting to be served.

Heh heh... going through my bookmarks came across this rather nice setup https://bitcointalk.org/index.php?topic=815310.0
Based on 4x IBM 2kw PSU's and multiple s5's. Pretty slick.

Only thing I'd do different is make the PSU shelf as 1+n with the PSU's current sharing a single bus that is then FUSED to source each miner. Always have max load under (in this case 2kw) what the PSU's could provide in total for redundancy if a PSU fails.

True.
Checked Kano a few sec ago and it shows canaan (Avalon) is running 2,089.15THs vs their normal ~250-300THs so they are um, still "testing"?

And if possible, how many folks would want these pre-built using your stock of of s1/3's as buffer while getting core exchanges from folks who have old ones to turn in for credit?

I'd be good for a modest 6-7 with the s3's I still have and can send as core exch.

re:

Most folks running more than a couple sticks always seem to be using powered hubs that the sticks plug into the top of. So, fin orientation make perfect sense for that.

Along that line -- If possible do not power any stick through an USB cable. The wires inside them, even in the new BC1.2 cables (for charging/linking to Tablets/phones, etc) the wire is barely thick enough to support 1.2A through a short cable. Plug directly into a powered hub if you are going to pull more than 500ma.

Bitmain who make the s9 has NEVER made or announced a "S9+". The last + miner they briefly made was a couple years ago called the S5+. It was in essence 3x s5's ran off of 1 controller board and packaged as 1 device.

At BEST someone has joined together 2x s9's using 1 controller for them rather like folks did with s7's. No matter what it will have no Warranty at all and anything saying 5-years is beyond ridiculous.

Screams SCAM to me but with a twist:
For once the seller is offering a miner that could be a deliverable item with reasonable price (2x the cost of single s9) and since the s7/s9 cases slide together a Siamese pair of s9's could be called something else.  For once, no outrageous claims of speed/power. I highly doubt the seller would deliver but for once this is a miner that could be made and sold by someone. The scammers are getting smarter...

Just no possible chance of a Warranty much less a 5-year one!

Spikes like that are very very common. Hell, my s9b1 which averages around 13.5THs often spikes up to 20Ths but again only very briefly. Do a refresh and #'s are more reasonable.

As far as I know, it is from the particular data being crunched and not a physical device operation suddenly getting faster. Either for some reason the share diff is dropping as the pool adjusts share rate to the miner or something along that line.

Really need to find the software end of mining Guru's here such as CK or Luke Jr.

Short and quick answer:
Even by itself, WiFi is bad idea for mining as the connection is rather variable. Alwayss use hardwire connections.

Throw in media streaming over the same WiFi connection and forget it. Aside from the really latest/greatest and $$ WiFi bandwidth sux plus, to use the latest WiFi standards both ends of the connection have to support them.

Key word is Customer. As in who's name is on the Invoice. If it is OP's actual customer name then fine. It is up to the name of record to file the RMA and his customers need to initiate the process under their name. Who/where the miner was shipped to for hosting does not matter.

However, if the Invoices show the OP or his Company as the Purchaser ergo, Customer as referred to in BM's Warranty terms then he is screwed. He bought the miners not for his use but for his customers who I assume paid him to buy the miners through/from him and set them up. In other words he resold them.

I have picture of all boards I sent out and yes most maybe all of the times got different boards in return from both Bitmain with boards sent to them under RMA along with boards sent to BitmainWarranty for paid service.

Works for me. If the returned boards are reworks that were sent to China, also fine also long at it works and in fact, unless explicitly stated otherwise it is normal at least for industrial equipment industry-wide practice for Factory-Certified rebuilt replacements to be provided - even under Warranty Terms - when billable repair costs exceed value provided the mfgr/repair depot keeps the dead item (to be looked at elsewhere). If the final repair location can more economically fix the boards and put them back into the for Warranty repairs pool so be it.

Rarely will I keep all of my quoted bits when I reply but THANK YOU! Usually this goes on deaf ears. Yes, ya gotta roll them bones and start somewhere.

#1 Rule: Even if going into this with ideas of a business, Consider your initial $$$ investment be it for 1 miner or 100 miners SPENT. Gone. Period. End of Story. Do not EVER use money you cannot afford to lose or pay back! I hope it is needless to say, never take out a loan to buy miners... Look at it like planning a nice long weekend or vacation at you favorite casino. I for one have a good idea of how much $$$ we set aside for gambling losses for our time there. If we win enough to lets us play all day/night while we are there, Great. Fantastic. But still have the probable overall gambling losses vs money we brought in mind. We walk in the Casino considering that money spent.

After that, reinvest all possible BTC income back into expanding the farm. Yes it takes time but over a few months it will get surprising how many miners you can get as it becomes more affordable from a farm income perspective . My main limit has been total power I have available (for free at work) and care to pay for at home. Total is around 28-29kW.

Finally, something missing from all of the "ROI" calculators oft mention in the Forum: The plain and simple fact that since here in the USA the IRS wants a piece of ALL BTC you convert to Fiat be it reported as Personal Income (and subject to Capital Gains Rules if earned from Trading) or reported as mining business + folks keep talking about ROI then treat the cost of miner like the business expense it is!  From a business perspective a miner is the same thing as an office PC and for Tax purposes is a business expense/writeoff. Last I recall the full amount can be written off in 3-years. Yes is a long time in Miner Years but - I have s7's still making money and some are from day-1 they were available so...

Since can't expand to use more power and limited miner availability restricts my s7 to s9 or A7 upgrades, um, BTC is starting to pile up again. Along with a growing pile of off-line s7's...

On a side note, I see that canaan is back on CKpool again and back to their previous historical rate of around 247-280TH/s. Pretty sure that is Canaan Creative aka Avalon.

Hopefully testing more A7's maybe? Until a couple days ago, in fact maybe until just 1-2 days before their announcement here, canaan was holding at a solid >2.5PH/s for over a week in an impressive boost - bet that was a mass test of the A7's. From what the Canaan website says, the have the hosting infra to handle several MW so...

edit: Hmmm... just looked at https://canaan.io/about/ and -- see no mention of the operation they had here in the USA. I know some bad blood showed up in the USA op but thought it was resolved. When what huh???

edit edit: found an old bookmark, BlockC was name of the op here in the USA http://www.blockc.co/
 heh heh... "Well be Back soon" etc. Site name unavailable.

I gotta agree with ya on this Doggie.
It rather all hinges on who the legal owner of the miners are. 1st and most important, on the Bitmain invoice for the miners what does it say under Sold To:? The OP's name/company or is it his Customers name?

If he has acted as an intermediary between his "Customers" to place and finance the ordering of the miners and shipping to his hosting location and the Bitmain Invoice says sold to either him or his company then he is the warrantied owner of the miners ONLY up to the point where his Customers pay him for the miners. After that -- he has become a reseller and no warranty allowed.

Ja. gotta love the ability to insure at full value + no concerns with Customs.

Now -- if we can only get Bitmain Warranty to tell us WHAT is failing on these boards! I asked them about it a couple time in email and is usually the same answer: "Well it means having the tech(s) record what they find and what is done to resolve it. That means someone (in Bitmain Warranty) has to enter the info in to logs and update the tickets with the information...."

In short - they won't do it because "it takes time and people.."
Riiiiight. Bet each tech has a daily work log of what they do eg. what Ticket#'s they work on, how many parts, when started, when done.. Bet *somewhere* in that work Ticket information is the diagnosis and resolution of problem. In other words: Fault(s) found and how repaired/why replaced. So why not lets us know?

Given what the repair cost runs, mine in the past have been around $140+ return shipping, Whatever is failing cannot be taking long to find/fix nor cost much if it a physical part that needs to be attended to. My company bills board/module (laser systems) repairs @ $115/hr + parts and based on that -- you get what I mean.

Google translate link for it https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=https%3A%2F%2Fforum.bits.media%2Findex.php%3F%2Ftopic%2F30990-nabory-dlia-apgreida-antminer-s5-na-chipakh-bitfury%2F&edit-text=

And damn fine point the article makes about PCIe connector ratings AND lifespan. All connectors have a rated mating-cycle lifespan. For most it is surprisingly few. Each you plug/unplug some of the plating and spring tension is lost increasing resistance.

Point is connector ratings are based on being mated/unmated anywhere from just 1 to perhaps a dozen times. In the X5 link his solution is to tighten the female sockets EACH time before plugging in. Not bad but still not final solution which is to lower the max current per-pin. And um, even better, perhaps use silver flashed pins?

edit: Also interesting in that it looks like they got it to work with the Bitmain GUI  So both share the same API's I take it? There has to be some driver translation somewhere...

By gum yer right: just looked at my b18. GUI reports 487.77, 460.44, and 568.2 while Awesome says all boards are 606MHz. My b17 shows the same discrepancy. Need to let Patrike know about this...

agreed. Looks like around a 20C swing for them. Mechanically that is not good for the chips and more specifically their solder bonds to the boards.

I just looked at my s9's and even the B17 and my latest a B18 (both never upgraded, has the auto-tune) is holding temps to about a 8-10C swing. I do see that the pre-auto tune ones with manual fan control have less variance, seems to be around 5-7C with my fans set to 85%.

In your screen shot I take it the gray-dotted trace and a couple others (~10C swing or less) are non-autotune miners?