https://bitcointalk.org/index.php?topic=940317.0

A complete (and updated just this morning) listing of everything I have available right now.

Bump for some updates.

I have pared down some of the inactive items, notably the Dell 750W boards and kits. This board is currently in prototype for a new improved version which will allow both screw terminals and PCIe 6-pin jacks. It will also be designed to pair up with other D750 kits more readily for single-switch control of multiple supplies (which means a 1500W single rail from 120V is possible for about $100) and should implement thermostatic automatic fan control.

I have added 1200W and 1500W kit listings to the DPS812 board section. I think these are pretty great.

I have added a new product - a 5V adapter board intended to take in 12V and provide 5V and 12V output for GPU risers and other PC innards.

I also updated the cables section with more information - I can now manufacture 6-pin splitters, 6+2 cables and 4-pin Molex cables, as well as provide sheathing for cables at an additional cost.

New products are in development, including a current-gen Compac stickminer, a stout powered USB hub, and an ATX24 adapter for motherboard power from a server PSU.

MarkAz has had his order of test boards and cables for about a week now, and I've asked if he'll get some pictures of an installed setup. I just now found my camera so here are some standalone pictures:





This board is 1.2x3.4 inches with three screw holes for mounting; it takes in power from 2x PCIe 6-pin jacks (only one may be necessary depending on your load) and outputs 5V and 12V on three 4-pin connectors. With moderate airflow for cooling, the board will comfortably handle 20A on both 12V and 5V lines simultaneously. I can provide cables of any desired length, with or without sheathing, from the 4-pin jack to standard 4-Molex for risers and other computer peripheral hardware. I can also provide 6-pin or 6+2-pin cables for powering GPUs. Cables are custom-made to order in the USA from 16AWG and 18AWG wires, no cheap Chinese stuff.



I have PCBs and parts on order, so if anyone's interested in the Molex adapter boards they'll be for sale in about three weeks. I figure $15 apiece on this batch; if a second batch is made in larger quantity I might take the price down a bit to account for bulk discounts on parts.

If anyone is interested, let me know.

I'm working on an ATX24 adapter design which should complement this board nicely, but I've been kinda busy lately so that's a bit stalled.

Honestly, I'd be interested in the whole S5 machine in the OEM package. I might use the cores in a future project, and if not I'm wasting my own money on shipping.

Nope, not at all. I might be interested in S5+ hardware for the museum but right now I don't have a lot of budget. This is for a chip-harvesting project so I need chips capable of being harvested.

I'm looking to buy about half a dozen S5 miners.

I'm not too concerned if they work or not, provided they aren't all burnt up. I also don't want anything with chipside heatsinks (no S5+, just S5).

So if someone's got some dead miners now would be a good time to recoup a bit on that.

I'm in the US, so US sources preferred.

(I am the manufacturer)

If the chip warms up but the LED never flashes white, I'd consider that it is hashing but the return data isn't getting back to the USB chip. That would indicate a bad solder joint on the ASIC. Or the ASIC is toast and it's just pulling power but not working. Either way, I'd first talk to the guy you bought it from and then talk to the manufacturer about fixing it.

That looks like a first-batch version and I would guess it was run very hot for a very long time. Probably the chip is toast. Who did you buy it from?

I'm assuming you've tried unplugging the stick and plugging it back in while cgminer is running. Does the stick get warm at all when it's plugged in with cgminer running? Have you looked over the troubleshooting steps in the first post, or searched the thread for advice on similar problems?

That looks handy as heck. The worst problem with low-voltage stability on these is cold boards. They really do like that 60C and up, so being able to thermostatically keep them in that range is nice.

Yeah, a lot of the stock S7s I saw were pulling 1400W for 4.73TH off 208V which puts 'em right around 0.3J/GH - the early 54-chip boards didn't have regulators and ran at a lower per-chip core voltage so they actually did hit about 0.25 (and I've seen some below 0.22J/GH with an undervolted PSU and 550MHz) but Bitmain didn't update the advertised efficiency specs when they redesigned it to be worse. 0.25J/GH out of a 135-chip S7 is decent.

I've pulled close to 15W out of USB for jacked-up Compacs before, moderate airflow on the stock heatsink. That's more heat into the ASIC than the S5 ran when overclocked.

Some of the new chips aren't 10W-scale chips like the BM1384 though, probably more like 5-7W I would guess. A stick might have two chips on it if that's the case.

Truth be told, I haven't signed anything with anyone at all. But at the same time I figure it's probably more polite if I don't go blabbing everything that's going on.

If I'm under an NDA, could I correct you if you were wrong?

Your error rate is higher than I'd shoot for, but 960W/4TH is a pretty good setting. I've set up several in that neighborhood.

Cool to see this effort still in use. Been a couple months since I plugged the tip jar (1CoLDs7XNi8ehyFnGWicUhgBGb7Kw42Ugi) so I'll do that again now.

I've got a copy of that also.

If I ever get to production, I'm thinking of offering a "core exchange" kind of thing where you'd get free shipping on a preassembled unit if you send in a retired miner. That way I could continue to offer preassembled units to people who didn't want to do the swaps themselves.

But we'll see. Right now I'll be happy if I can get a stickminer going. I'm waiting for one outfit to send me some datasheets so I can at least start hardware design.

I've got most of the power and controls at least conceptually ironed out, but not the specifics yet. I need to start playing around testing regulators and whatnot.

Not sure what you mean by "get burnt" - if you mean the thing overheats and fails, if you can do that to a Compac it's your own fault and if it's not your own fault I'll fix it for free as long as I still have parts around.

Between my own, and yours, and stuff I've picked up from others, I have about 50 chassis between S1, S3 and S5 to play with.

I'm all for extending the warranty, but raising the price is foolish. Their margins probably already allow them to replace every part of every sold miner and still draw a slight profit. With the prices they've got now, we're subsidizing the miners in their own megafarms - we're already paying them hand over fist to screw us in every way possible. The current price might be justifiable if it had a year warranty on it, assuming the warranty counted for anything and they didn't work so hard to deny every rational claim.