I'm looking for larger quantities of GTX 1070's or higher, ideally at least 10 cards per transaction (so I'm not interested in one or two cards, and the tx fees make it less than ideal for both of us), located ideally in the US.  Preferred payment via BTC, and I won't do anything without escrow from a reputable agent on here (preferred OgNasty).  Contact me via PM if interested with what you have and what price.

Hey there - I'm picking up some new toys and am selling one of my cars - it's a 2011 Lotus Evora S 2+0, a great car and one of the more uncommon exotics.  When I go to a Cars and Coffee event or similar the Evora really stands out, especially to people who are actual drivers and appreciation a car that doesn't just look awesome:



and the obligatory proof photo - the 1080TI is not included and is already busy mining.  



and here's a bunch of additional photos, including the interior, engine, etc:

https://www.dropbox.com/sh/d7qfmzpuefonx65/AACmOh3wU-kzF8T-KT_AebDHa?dl=0

It has a bit over 9k miles on it, I'm the second owner - the original owner was in San Diego (CA), and had all services done by San Diego Lotus.  I'm in Phoenix (AZ), and there's no Lotus dealer here, but I've had all the services done by the local Ariel Atom dealer, who also did all the services on my other Lotus.  He's also the one who will be handling the logistics of the sale, so you get the convenience of dealing with a real dealer, but also  the convenience that the actual owner knows what a bitcoin is and how to exchange them:

http://www.formanmotorworks.com/

Priced at $55k - the conversion to BTC will be done when it's purchased, and we can do a mix of cash and BTC if you want, or all BTC which is preferred.

I have a fair number of Avalon A6's that I'm selling - most have been in use since they were initially released, and all work flawlessly.  They've been housed in a temperature controlled environment, although in the winter that basically means everyplace - and they've been run exclusively on 240v server PSU's.

You can see the action shots here:



and here are some of them running in one of my plenum's:



I'm selling them for 1.9BTC each, INCLUDING shipping - I only ship in the domestic US, not Canada or International (sorry).  Price is non-negotiable, and is for the Avalon A6 itself and the link cable, so you'll need either buy the Pi+usb adapter or already have an Avalon A6 to chain it off of.  For anyone who buys 8, I'll include a Pi+usb adapter, so you'll have a fully functional rig (this was the configuration I ran them as).

If you want to buy one, then act fast because I suspect they'll sell quickly, I only will accept BTC, and everything escrowed through OgNasty (buyer pays escrow fees) - no direct BTC to me, so no scammers pretending.  They'll ship within one day of the escrow being ok'd by OgNasty (so sometimes same day, depending on whether we get it in time).

PM me if you have any questions, or start the escrow through OgNasty and PM me if you're only buying a couple.  I'll keep the thread updated so when I'm down to my last 10 or so, then just make sure to contact me first.

[$425/each including free shipping]

I'm in the process of switching over my S5's to S7's, so the plenum miners are next on the list!  If you enjoyed my acrylic case mod thread:

https://bitcointalk.org/index.php?topic=1086882.0

Now's your chance to buy one - at least when you buy one of my S5's.    Here's my current configurations, you can see all 32 miners working away quite happily:




Each miner has the stock fan (I'll be happy to swap the stock fan with a Kaze Ultra, if you'd prefer that), one of my acrylic fan spacers, the full acrylic enclosure (both sides with BTC logo, bottom and top).

I'm selling them for $425/each including free shipping inside the US only (no international).  BTC only, escrow at buyers expense with any of the high-ranking escrow agents on the forum (OgNasty preferred).

I also have the acrylic side panels from the first revision of the plenum - if anyone is interested, shoot me an offer.  Keep in mind that these are not light, so shipping will be expensive:



you can see them in use here:

https://bitcointalk.org/index.php?topic=1184272

there are 24 of them, they'll be sold as a lot - no point in breaking them up really, although if you were so inclined you could easily make smaller versions of the big rack.  As you can see from the pictures above, my latest version just increases the density of the miners, and moves the PSU's off to the side, so I can have 32 instead of 24.

So I just had a slightly disturbing issue with one of my S7's - I just happened to be near it when it started beeping (the same thing as if the Internet was down).  I went in to check it out, none of the other machines near it were having problems, so I power cycled it.  It didn't renew it's DHCP lease, nor did it try to get another address, but it powered up as if everything was ok... More troubling is that I was watching my power monitoring, and the power jumped as if it were hashing full speed - I went back to the unit, the fan was spinning but on a very low setting, and the air out of the back was HOT.  Having flashbacks to the S5 burnup problem, I unplugged it again, let it sit for a couple minutes, and plugged it back in.  Same issue.  This time I pressed and held in the small hidden factory reset button, after a couple seconds it gave the long solid tone that normally means it was successful, but once again - no DHCP request, and it looks like it's hashing even though it doesn't have any internet connection.

REALLY not wanting to see a repeat of the S5 issue - loosing a couple hundred bucks a pop when it happened was bad enough, but loosing thousands would be brutal.

I'm going to swap the BB with another S7 to see if that might be the issue, and I'll update as I do some more tests and see.  They've been running fine for several weeks, I power them off of a IBM 2880W PSU (one PSU for each one, since I have a bunch), so power shouldn't be an issue...

I have a fully built Syscooling S5 system - this is their higher end kit with the largest radiator, and 4 S5's in one small case.  These are pretty rare to see - primarily because the shipping charges for the kit from SysCooling is super expensive ($250 for what I bought).  I also upgraded the hoses to larger diameter as well as replacing the two stock case fans with Noctua NF-F12 Industrial PPC-3000 PWM fans.  There is a total of 8 blades being run by two Beaglebone Blacks, using the latest firmware - it runs like a champ and is very easy to manage.

In terms of my thoughts on the unit itself, in terms of thermal performance I find it to be comparable to an S5 with heat sinks and my acrylic case mod - meaning that it probably runs about 5-10c cooler than a normal unmodified S5.  I configured it as series instead of parallel (all the parts are included to allow you to change to parallel if you like), and when it's operating in a somewhat cool environment there is a temperature difference from the intake to outtake of about 8c - in a warmer environment the difference between blades diminishes to just a couple degrees.  I would also guess that it handles warmer conditions better than a normal S5 just by virtue of how water cooling works.  The biggest gain is in terms of the sound level of the unit - my modified S5's run quite a bit quieter than the stock - I can have them running in my house and while you certainly hear them, you can still have a conversation without annoyance.  This unit is substantially quieter than my units - I would say that these 4 combined miners make about 1/2 the noise of one of my moded miners, and probably 1/4 of a stock S5 if not less.  If you put fan controllers on the radiator fans and run them at about 50%, in a 78f house the unit almost silent.  So, if you're looking for a great space heater this winter, look no further!  

It's fully assembled and tested - once you get it you'll just have to reconnect a couple of the tubes and fill it with distilled water, connect your own power supplies, and you're good to go.  Saves you the time of assembling the kit and splicing the 18 pin blade connectors - and believe me, after spending hours and hours doing that, you'll definitely not want to do it yourself.  

I'm looking for $1700 with free shipping inside the US.  If you want a power supply, I can include the IBM 2880W Platinum server PSU with breakout and all cables for an additional $220 - this PSU requires 240v, so not running in your house (when I ran it in my house, I used two 1300w PSU).  

Payment in BTC and if escrow used then buyer pays escrow and only with reputable escrow agents here on BitcoinTalk (OgNasty is my preference, since I've used him in the past).  

PM me for details, and don't fall for any scammers posting BTC addresses in the thread, I'm never going to do that.

[free shipping]

The important stuff first:

110's are $1000 with free shipping inside the US
88's are $800 with free shipping inside the US

Ah, the amps good so fast and I need to free up some power in my prototyping garage mine, so I want to sell some of the InnoSilicon Terminator Mega 110's and 88's... Not much to say about these that people don't already know, they do about 10W/MH, the 88's run cooler and quieter than the 110's (in my experience, and quiet is a relative term when it comes to any miners).  If you've only done Bitcoin (SHA-256) mining, then these are pretty fun to play with, since they're scrypt you can solo mine many of the altcoins - and it's pretty cool to see your wallet popping up with found block notifications.  They all come with the factory PSU's, which I've been running exclusively on 240v (as was the person I purchased them from).  I don't overclock them, and in many cases underclock them just because power is a bit of a premium for me (which is why my firmware only supports underclocking and not overclocking).

They're big and heavy as hell, so not overly interested in shipping outside the US.  Payment in BTC and if escrow used then buyer pays escrow and only with reputable escrow agents here on BitcoinTalk (OgNasty is my preference, since I've used him in the past).  

PM me for details, and don't fall for any scammers posting BTC addresses in the thread, I'm never going to do that.



And for anyone using my custom firmware for the Terminators:

https://bitcointalk.org/index.php?topic=1141802.0

don't worry, I'm not selling them all, so I'll still be making more updates to it in the future.  

I thought I would post some of what I've been fiddling with lately - if you haven't seen the S5 acrylic case mod I did a while back, it's probably worth checking it out for some context:

https://bitcointalk.org/index.php?topic=1086882

What I've now been working on is controlling the heat from the miners, and try to come up with a more modular large scale solution.  I really wanted it to be self-contained and not too far of a radical departure from the S5... Since I love me some 8020, it's always the starting point for my larger projects:



My idea was to have a way to mount multiple S5's and their respective power supplies at the same time, this was the general layout I had in mind (position, not orientation):



I then just repeated the spacing so that I could have 8 rows of 3 sets of S5's/PSU's, for a total of 24 to a build:



Next stop was my laser cutter, and I tried to come up with something that would be workable within my cutting area (12x20), but also modular, so if I wanted to make a different mounting plate for a different miner, like an S5, then it would be possible as well.  In production, I wouldn't use acrylic, I would probably use aluminum - but acrylic is super easy to work with, so it's always my starting point.  Notice the notch above the PSU, this is so the power cable can loop back out so only a little bit is in the air chamber:



Let me tell you, repeating this 24 times starts to get tedious. 



The actual air chamber is meant to work as a plenum, to channel the air out to where-ever.  While I have all the fans connected in the initial design, I have toyed around with the idea of just using two large extractor fans somewhere further down in the plenum to eliminate the unit-fans altogether:



One of the things I love about 8020 is that you can use the extrusion as guides - so all of the mounting plates slide into the enclosure - making it easy to work with.  If a machine goes down, at worse you have to remove the two machines in front of it to get access - but I haven't really had any machines fails, so that wasn't high on the list of my design goals.

I use their 2x1 extrusions for extra strength and rigidity, but where they slide in I use two singles, so one locks in after they're all installed to stop any air from flowing out to the side.  You can also see how well the acrylic sits in the extrusion:



Top down, you can see that everything comes snugly together, but still decent spacing around the S5's and PSU's:



And then with all the miners installed - I had originally intended to use it in more of a table-top configuration as in the picture, but it turned out to be inconvenient in working with, so I changed it to an upright design:



Finally, here it is with some of the other machines, starting to get setup - for the side panels I just used high-heat fire rated wood composite - the back panels are removed so you can see the machines, and it vents up into the ceiling:



All in all the design works really well with the addition of some extraction fans - the problem I had without them was that the PSU fans didn't generate enough static pressure, and the air would actually vent out through them even with their fans going.  Since the air was hot, this in turn would thermal shut down the PSU and the miner - super annoying when it first happened, since some of the PSU's were more susceptible to it than others, and it looked more like some strange PDU issue at first.

One super-nice thing about this design is that it gets the hot air all in one place and keeps it away from the S5's, so the space in general runs much cooler.  The acrylic cases work great also, as they channel the flow over all of the board, not just the part closest to the fan.

I've done a couple modifications since I took the pictures, and I'm also redesigning the mounting plate - I'm probably going to create a separate air channel for the PSU's, and have it more of a split system.  I really like J4bberwock's new PSU design:

https://bitcointalk.org/index.php?topic=1178099.0

So I'm going to be focusing my future designs more around them... And next on my list is playing around a bit with water cooling, so who knows where that will lead me.

Anyway, hopefully this sparks some ideas for other people on ways to control airflow... It would also be super easy to extend this design to do some sound control also, if that was an issue.

First off, this is not to be confused with Emdje's firmware, which you can check out here:

https://bitcointalk.org/index.php?topic=672969.0

The big difference with his (and it's a big difference) is that he's building newer versions of CGMiner, since he has the source to the A2 - super cool, but it doesn't work on all my devices, plus while it's definitely nice to be running a newer CGMiner plus over/underclocking, for me some of the bigger issues were things beyond that.

And as with his, use at your own risk - although mine uses the stock cgminer binaries available on Zoomhash:

http://zoomhash.com/pages/a2-and-mini-a2-software-setup

Specifically the Mega and Mini one - but everything seems to work fine on all the A2's I have (new 110's, old 110's, and 88's - but I don't have a Mini to test on).  So, what different?  This is really meant to be just a cleaner and bit more manageable version of the original firmware - I've cleaned up the UI a bit (not much really), and added the following things (all via the WebUI):

v09-01-2015:
    * All graphs now use the same timebase, so it's easier to see if failures are related
    * Log viewing now available for Messages and Syslog
    * Removed swapfile and system logs now stored in tmpfs, so more SD card friendly operation
    * Timezone can now be specified to all the times are easier to figure out
    * CGMiner will auto-restart on exit, and reports how many restarts happened and at what time
    * More CGMiner graphs
    * Network graphs for both latency to gateway and latency to Internet (Google)
    * Support for spaces in password for pools (for selecting additional options)

v08-01-2015:
    * DHCP by default (can be set to static IP in the web UI, default static IP is 192.168.1.100)
    * Hostname can be specified, makes finding machines on your network much easier
    * Allows underclocking to 500Mhz (in 100 Mhz steps)
    * Switch between Failover and Balance pool strategy
    * Switch CGMiner logging on and off
    * Helper function to swap Pool 1 and Pool 2 (when using Failover)
    * Device profile, specify speed (88MH/110MH), number of boards, etc
    * User field for 'Location' of device, helpful for tracking machines down when something is wrong
    * Reboot option
    * Benchmark option (CGMiner function for ~60 seconds) with separate logging
    * General system information, free HD space, free memory, average CPU load and temps
    * RRD graphs of CPU load and temps
    * RRD graphs of each blade (stacked) and avg temperatures on dashboard
    * Historical RRD graphs/data for one year
    * Hardware error rate shown on RRD historical page

Here's where you can the latest version (09-01-2015) ~254.5MB:
https://mega.nz/#!3VkjgaJT!PH4ixphRQFT23tgTwpnSwrkJPG0gB2VXsmN9BxagftI

Here's where you can get the previous version (08-01-2015) ~308.9MB:
https://mega.nz/#!PFVjBBYC!iHabEKCwgJbXGOTJ6d2wvz0QsxyN_Tx-RjmMLRULTCk

Install is easier than the stock image, just unzip, write it to an SD card using whatever app you prefer (I use Win32 Disk Imager), stick it in your A2 and boot it up - everything should be pretty self explanatory.  The graphs will show up as broken links for the first ~5 minutes, until it generates the initial data - from then on it's all on autopilot.

If you run into any issues, ideas, suggestions or whatever - make sure to post them on the thread!   Hope everyone enjoys it!

First off, I'm a big fan of what Vorta has been doing on his thread - if you haven't checked it out, definitely go there and check it out:

https://bitcointalk.org/index.php?topic=1072176.0

I've been experimenting a fair bit with different case designs as well - in particular trying to find the best balance of cooling + sound + ease of build.  As Vorta mentions, the thermal sensor on the blades is really a poor design - it doesn't really give you a good sense of what the board is actually doing, as I've I've seen it report 70c when it reality it was 90c+.  I have a thermal camera (BTW, you can mod the E4 to have all the features of the E8, awesome!) that I've been using to analyse the heat dissipation and what is actual happening to the boards as I change things around - and try to use things less subjective, like anemometer to measure actual airflow, etc.



It's important to note on the thermal side of things it's a bit tricky measuring it - because things like acrylic are not thermally transparent, so they need to be removed in order to measure temperatures.  At the same time, this affects the airflow, so in general I try to let it run for a couple minutes assembled, then pop off the side or whatever and image it so I get something that's closer to what reality is.

The first thing I did was replace the sides - personally I like the look of the circuit boards, so transparent acrylic works well for it in this case.  I was also bored and decided to etch a BTC logo in it to be fancy:



I went through several design iterations, but ended up with this as the best general configuration - the sides are 2mm acrylic and the top and bottom are 5.6mm, but only because I used up all my 2mm and only had 5.6mm left.  I think 2mm all around is what I'll use for my finished version.  I also took the hint from Vorta's on ducting, and put a 5.6mm spacer between the fan and the enclosure - this actually made a big difference no matter what you're doing, so if you're looking for a super simple mod to do - do this.  Here's the assembled verison:



It's worth pointing out the only the sides and bottom are screwed in - the top just rests on the PCB and sides.  I found this to be the most convenient, and the cables and everything else hold it in place really well, so there really isn't a big need for anything else.  You can see here how it attaches to the bottom:



Vorta filled in the bottom area with his design - which I think is technically better, but most of the fins on the bottom of the heatsink on my S5's look like a dogs lunch, so this works in all situations, and gets the bulk of the gains.  You can see here a closeup on the top, and how it's edged around the Beaglebone:



In some of my earlier designs, I basically screwed into the top much like I did on the bottom of the heatsink, and then made my own mounting adapter for the Beaglebone - but this didn't make any difference in my measured results, and was actually a huge PIA to install - whereas this one just drops on and you're good to go.

Now, the only thing better than not generating heat is getting it the F away from whatever is making it, so ducting is also a big consideration for me - here was one of my first experiments with this design and a 4" duct:



Unfortunately, a 4" duct doesn't allow a large enough volume of air through, so it hurts the thermal performance too much for my tastes.  I'm in the process of changing the flange that connects to the case, and moving up to the larger 6" ducts common to HVAC.  I know I could have gone to 5", but in the US at least they are hard to find at Lowes or Home Depot, so better to have too much air volume than too little.

Once I was happy with the general design, I started playing with fan configurations - push, push/pull, and just pull.  While I love the performance of the stock fan, I don't like the sound level - I've literally bought every 120mm fan that Amazon has to offer, and I've settled on this one:

http://amzn.to/1S6nDAV

I've probably bought about 50+ in the past few weeks, so they're probably wondering what's going on!    It doesn't have nearly the performance that the stock fan does, but it has the best balance of the ones I've used.  One downside is that it's not PWM controlled, but it's fixed speed of around 3k is more than acceptable for my purposes, since all my S5's ever do is spin up to full speed anyway - and personally I'd rather have the fan fully working the whole time anyway.  Back to the case, without the enclosure, push is definitely the way to go - with there being a slight advantage to push/pull, but generally not worth the extra cost IMO.  But, with the enclosure, pull works significantly better, and push/pull gains even less than the non-enclosure situation.  Now, keep in mind, I'm basing this off my thermal readings of the PCB, not the temp reported - although in general they tell the same story.  So here's one of them in action:



I think I may do a couple more minor tweaks, but I'm pretty happy with this design, and I'm more than likely going to do a big batch of them so I can upgrade all my existing cases.  I wish I had one of the new S5's with the heatsinks on the side to test with, but even though I've bought a ton of S5's in the last month, I haven't been able to score one with them.

If anyone has any suggestions or ideas, I'd love to hear them... Since I'm in the mode of still tweaking it, now's the time!

And if there's enough interest, then I may make them for other people when I do my big batch - one nice thing is it's super easy to do, you can install it in under 5 mins and it's good to go.

Hi everyone, I have a bunch of S5's already, but I just bought a new one that it having an issue - when I boot it up, it looks like it's starting up like normal, and after about the 1-1.5min startup period, it starts making the alarm sound (solid tone), and the two LED's on the front blink on and off slowly.  I've tried holding in the reset button to flash back to the factory settings, but it doesn't seem to affect it (it just continues it's solid beep).  Any ideas?  Thanks!

I'm responsible for developing the backend and software at a company based in Arizona called 'Ultimate Consignment' (UC for short).  You can check out this video to get a sense of what the stores are like:

http://www.youtube.com/watch?v=oibjkpYb_oI

But basically we're like the real world version of an eBay or Craigslist - everything we sell is in our physical possession, and we do the pricing research, write the descriptions, take the pictures, etc.  We don't use any stock photos, and everything you see are pictures of the actual item, not similar items.  Right now we have two locations in Arizona (Phoenix and Mesa), each one is about 70,000 square feet, so in terms of size they're larger than your normal grocery store, but smaller than a Walmart.  We get basically everything under the sun, from refrigerators to Snap-on tools to furniture to high end art.  It's almost all obviously used (since we're a consignment store), but we do occasionally get new items occasionally.  We currently sell things online via Amazon and eBay (the bulk of our sales are in-store, but we sell probably 100+ items a day online).

I've been pushing for our support of Bitcoin, and we're finally pulling the trigger on it.  We also developed a competitor site to Craigslist called Ultimate List (UL for short), and that's how people can currently view things that we've got in inventory.  It's still in beta, so only a few people have access to post listings on there currently, but once it's out of beta, then people will be able to post things for sale on there for free.  You can check it out here:

http://www.ultimatelist.com/

So, my question is this - what would you like to see in terms of integration, and am I wrong in thinking that pushing for Bitcoin support for our sales is a good thing?  I think we're kind of like BitCoinStore, except we're used goods - so you get even better deals.    Let me know what you think, and what you'd like to see from us as a retailer...  Right now my focus is on getting Ultimate Consignment supporting Bitcoin, so once that's done I'll be looking at how to better integrate it I'll look at enhancing UL as well.

Feel free to ask anything, nothing is set in stone yet, so I'm hoping a good discussion with the BT community can results in something that I already think is pretty cool to become even better. 

Although I ultimately want to talk about this in the marketplace section, since I'm a newbie I'll get the ball rolling on here...

I'm just getting ready to integrate Bitcoin support into my company, which is a large consignment business... Think BitCoinStore.com, but instead of new goods, and primarily electronics, it's everything and they're used.  The upside of used is that you can get a much better deal than you normally would buying new, and you can get things that traditionally would be harder to get.

We're really open to figuring out how to best integrate things, and hoping to get some good feedback and suggestions from the Bitcoin community at large.  We've actually had people inquire about freighted things like couches overseas in the past, so we're not just talking about selling some cups or a toaster.

Any thoughts?