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Great new SHA256 Mining Pools

I mined at btcguild, triplemining and st Eligius pools, they are stable and reliable pools. But then I read on bitcointalk about a new pool: CKPOOL made by: ckpool code by ckolivas and ckdb code by kano.

You can mine at http://www.kano.is with PPLNS reward with (only) 0.9% fee. It has a great performance. I mine at this pool for some days now and I see it has better performance than other pools I used before.

If you are a real dare-devil: mine SOLO at http://solo.ckpool.org. This pool is awesome, you mine together with other miners to find a block but if you are the one that finds the block you will get the whole reward of 25 BTC!! (minus a small fee of 0.5%). It is anonymous, just mine just with your walletaddress as worker, no registration required. I know the change you will find a block is very smal, it’s like a gamble but it is fun and exciting.

So come on fellow miners , join us at http://www.kano.is and http://solo.ckpool.org

Here is a quote from Ckolivas about CKPOOL:

About ckpool

Ckpool is a project by the cgminer development team designed to complete the circle between miners and pools from cgminer to ckpool. The bulk of the code work for this was commissioned and paid for, however I provided an incentive to the group commissioning the code to open the software up to all by charging less for free software than for closed code. Ultimately this should benefit bitcoin far more than me simply working on code for another pool. I intentionally chose to write most of the code from the ground up and not use external libraries to have complete control over all the code given past experiences of difficulty to debug failures in library code that was outside our domain with cgminer. The separation of the pool code from the database code allows the pool code to be ultra-scalable and extremely low overhead by dissociating any concept of share counts, user accounts, authentication, front ends, payschemes etc. etc. These can be as vastly different from the envisioned ckdb+postgresql+php interface as the administrator desires without any change to the core pool functionality.



The CKPool www.kano.is is doing great ! More miners joined and total hashpower had grown to 600+ THs and the pool has found 4 Blocks already in just 1 month ! So join us fellow miners !

http://www.kano.is CKPool BTC mining

http://www.kano.is CKPool BTC mining

Crypto Cause: Spinal Surgery Bill Funding!

Update September 20:
The cause for Scott has ended, we all raised a good sum of dollars to help him pay his medical bills.


Crypto Cause : Help out Scott Fargo !

Crypto Cause : Help out Scott Fargo !

Crypto Cause helps out people in need, special people who do lots of (free)work for the Bitcoin (and other crypto currencies) community. The cause that is activated on August 28th is for raising funds for Scott Fargo to get his medical bills paid. Here is his story: http://viturrex-pty-ltd.myshopify.com/blogs/news/16095159-cryptocause-project-2-spinal-surgery-bill-funding

Scott writes articles and does review of mininghardware at cryptocoinsnews.com . About Scott:

I am a disabled former Systems Admin, computer tech, business manager enjoying crytpo currencies. I am deeply involved in the mining ecosystem and physical coins, It fascinates me how it has brought people from all over the world together into a tight knit supportive community with commerce and tech.


I friendly ask everybody to help out Scott, you can donate or buy great Hashlets here: http://viturrex-pty-ltd.myshopify.com/collections/all

I donated some $ and bought a Hashlet PRIME 5M/hash which is mining now at ZenMinerCloud.

One String Miner Test 1

Today I was wondering why the first 8 build OSM (One String Miner) only hash between 23 en 26 GHs. I measured the voltage input in the boards: 11.4 V !! The PCI-E connectors from the PSU “only” supply 11.4V instead of 12V. Weird, I will investigate tomorrow. I had 4 DIY-1 kits left, build the first one just standard: pcb + heatsink. For power I used a cheap 12V 10A PSU from Dealextreme. You can adjust the 12V power output on the PSU some time for some tests:

No thermal paste between PCB and Heatsink + Artic F8 Fan (very low RPM)

Voltage [V] Temp [°C] Hashrate [GH/s]
12,22 56 32,8
12,30 58 32,26
12,14 57 32
11,91 54,6 31
12,40 59 31,6
12,10 56 31,4

With thermal paste between PCB and Heatsink + No Fan We will see how temperate gets higher after x seconds

Voltage [V] Temp [°C] Hashrate [GH/s] Time [sec]
12,10 35 31,70 10
12,10 36,6 31,80 60
12,10 39,2 32,05 120
12,10 40 32,08 180
12,10 40,7 32,14 240

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One String Miner

Today I received my One String Miners. Great design by C-scape and Intron based on Bitfury chips. I won some miners at an auction at bitcointalk.com . Ben Turas is selling these great miners, designed in the Netherlands, produced in Asia!
Check out his salestopic.

The OSM is based on Bitfury chips and each board contains 15 chips, hashing 25+ GH/s without heat sink and 30+ GH/s with heat sink.  Each board runs from a single 12V supply, using ~25W.

I have 4 DIY1 and 4 DIY2 kits. This evening I build up the 4 DIY2 kits and build a small tower. Quality of the boards and other materials is high. Building was very easy. Screw the pcb to the heatsink, connect the wires to the powerconnectors, that’s about it. I used a BeQuiet PurePower 600W PSU I had laying around. Attached two fans, all in a temporary setup. 10 Port USB Hub is a Rosewill RHB-500. I used an ArchLinux PC, downloaded and compiled CGminer 3.12.3, turned on the miners, started CGMiner and it detected all miners. 3 miners were “ZOMBIE” at first but after just 10 seconds all boards were recognized and hashing. All works great with any issues. Temperatuur is stable with only 2 fans (in the most efficient position), 30 to 40 degrees Celcius. I haven’t tuned them yet so they hash around 25GH/s per board.

For now some photos, next few days I will do some more tests and tuning. I realy like these boards you should get some too!

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Hashbuster Micro Heatsink + Thermal Paste

Update December 11th:
Today I tried to tune the Hashbuster Micro a little more without overclocking it, just a “hardware” tweak. I put some non-conductive Thermal Paste between the heatsink and PCB.

  • Disconnect the power- and usbcable
  • Unscrew the 4 screws on each corner where the fan is attached to the pcbspacers (the fan holds the heatsink in place)
  • Simply remove the heatsink
  • Put nine dots of paste on the “golden” squares (that’s where the chips are)
  • Place back the heatsink, press it lightly and move it around/side to side a little so the paste gets spread
  • Put back the fan and tighten the 4 screws
  • There is a change that some thermal paste leaks through some very little holes in the PCB. You will see some “worms” on top of the PCB (where the components are). Clean it with a dry cloth.
  • Reconnect the power- and usbcable and start mining again

Now you should see some temperature drop. I my case temperature dropped from about 45 degrees celcius to a 30 to 33 degrees. Maybe I used a little bit too much thermal paste, I think if you half the dots you see on the photo it should be enough 🙂

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Short manual BFGminer for Hashbuster Micro

230Ghash/s 10x Hashbuster Micro

230Ghash/s 10x Hashbuster Micro

This is a short manual how to install BFGminer version 3.8.0 on Linux for the Hashbuster Micro 20+ Ghash/s (bitcoin)miner. Tested on Debian Linux 7.2

Update Dec 20: newer version of BFGminer is out: 3.8.1 . Manual is still the same but you can leave out: Now we do a little tweak to prevent reinitializing errors,….

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