Mine ran just shy of $400 for 2 X 220v 30A circuits.  This included running the wiring, the new 30A breakers, and replacing some existing breakers with duplex breakers to make room as my panel was full.

L6-30R seems to be really common.

I purchased the receptacles myself and handed them over to the electrician when he came to wire everything up.

Understood, I have a 3000CFM fan already mounted which will suck the exhaust through the flex and dump it in my attic, so I will just size the flex appropriately and not use an adapter.

These are the "adapters" I am talking about on tbe Bitmain products.

http://ecx.images-amazon.com/images/I/4161fXDJ5hL.jpg

All,

I'm looking for suggestions/pictures of how people have vented the exhaust of their 741s.

I see 3d printed parts for the Bitmain products that adapt the exhaust to a dryer vent style pipe, but with the shroud design on the fan side of the Avalon, this doesn't look like it will work in the same way.

For those of you who already have 741s, can that shroud be removed to expose the fan?

All,

Have a question.  On the A7, is the fan side of the unit the intake or the exhaust? 

Wow...  Thanks for sharing all of your experiences and great ideas.  I am learning quite a bit by reading and following along.

I do have a question that seems appropriate based on your garage experiences.  I am in Little Rock, AR, so a bit further north than you but seemingly just as hot, just not nearly as humid (speaking from my experience visiting Houston in July  ).

I currently have 48 GPUs in the garage (double car) in an open air config and will be adding another 24 GPUs before my power capacity is tapped out.  I am using metal bladed fans blowing on the GPUs which seems to be doing the job at this point with the garage door cracked open about 8" or so and the attic access opened up.

I have ordered and received 4 of the Windeevent (https://windeevent.com/) units and I am trying to determine the sizing for a fan in the ceiling of the garage to exhaust the hot air into the attic.  I have been looking specifically at the QuietCool (https://quietcoolsystems.com/) whole house fans due to their easy installation, warranty, and very efficient motors.

The information that I have found suggests that I will need about 1.5 sq ft of intake for each 1500CFM, at this point, with the 4 vents, I have just over 4 sq ft so I have enough intake to support a bit over 3000CFM.

Can you offer suggestions on how many CFM I should be shooting for, I am thinking at least 1500 and more likely something around 3000 for the estimated 3500 cu ft of garage volume.

Thanks in advance for your help!

Robert

I can break nearly anything  , so I will let you know if I find other issues.

Hello,

The summary display seems to be a bit off if you are using CM's Cryptonote miner.  It just appears that the field isn't setup to be long enough and it covers up the uptime value as per the image.

http://imgur.com/a/dNyXA

I forgot to mention that in regards to the large farms, they are certainly out there, those aren't just made up numbers or private mining software.

Here is the description of one such farm pushing nearly 7Gh/s

http://ethosdistro.com/farm/

There are others running ethos that I have seen with well over 50 rigs, so those high hashrates are achievable if you are willing to put in the time and make the investment, which as you might imagine is significant.

There are a few threads in the last few months where people much smarter than I am discussed the theoretical maximums on some of the algorithms based on memory speeds, memory bandwidth, etc.  We are much closer to the maximum with public miners than you might believe.

The fact that you see GPU core utilization low just means that the particular algo isn't GPU bound, but is likely bound by memory bandwidth and access times.  Each algo is different and may stress different portions of the GPU Ethereum for example is not very GPU core intensive, but very memory intensive, which is one of the reasons the cards with HBM can achieve faster hash rates at lower memory clocks and why manipulating memory straps have such a large impact on performance.

On the flip side, ZCash is very gpu core intensive, but not very memory intensive, so you can actually underclock your memory and have little impact on your hashing speed.

Monero seems to be a blend of both getting best results with a high gpu core speed and a high memory clock with modified memory straps.

I would be interested in seeing the ETH/ETC hash rates for the Eliovp modified ROMs as well.

For those of you with them if you could post both that and your XMR hashrate with your GPU/MEM clock settings that would be really helpful for comparison purposes.

Robert

Hello!

I am testing dual mining since the value of DCR has increased to the point where it draws my interest.  I followed the documentation on the site, but and it is working, but the miner display looks "off" as I expect it should be giving me a $ value for both ETH and DCR.

http://i.imgur.com/eOhb8n5.png

Any thoughts or suggestions?

Please read 2 posts above yours...

This thread covers it..  It is on a Russian forum, but the instructions are in English.  It is also available in ethos which is how I found out about it and it works great and flashes much faster than its windows counterpart.

http://bitcoinbg.eu/forum/viewtopic.php?f=6&t=3967

Bios flashing is supported under Linux, including Polaris cards.  The atiflash variant that supports this was leaked quite some time ago.  :-)

Sammy's pool doesn't support the stratum implementation used in sgminer.

If you check out the issues on his Github repo there is much discussion about it and he is of the opinion the mining software should change not the pool software.

Read the entire post, which you just quoted.....

You can't treat Hynix memory and Samsung memory the same.  RX 470s 4GB are available with both, I actually own MSI RX 470 4GBs with both.  You cannot use 1500 straps on Samsung memory and expect to run at 2000+ as the factory timings are much tighter on Samsung memory.  My MSI RX 470/4GB with Samsung memory easily achieve 29.3Mh/s at 1150/2100.

For Hynix based cards, use the 1500 strap, for Samsung based cards use the 1750 strap.

I have 24 of the MSI 470s and they are my favorites, I actually prefer them over the Sapphire 480/8GB variants which I have as well.

My latest batch of MSI 470s (4GB) have Samsung memory.  You didn't take the 1500 strap and copy it up and expect it to clock at 2k on Samsung memory did you?

On my MSI 470s with Samsung VRAM I copied the 1750 strap to the 2000 range and I am running them at 1150/2100 and I am getting 29.3Mh/s out of them rock stable.

I have run across this when the integrated GPU is enabled.

Edit the device profile you are using and set the platform to 1 and see if that helps.