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1  Economy / Computer hardware / [WTS][US] 2x Obelisk SC1 on: September 25, 2018, 07:37:06 AM

i'm selling my two Obelisk SC1 (unshipped, located in the US) from Batch 2, anybody interested? Post or PM me your price, highest wins.

I'll update this thread with the current price.

Current Price: 100€

Best regards
2  Economy / Computer hardware / [WTS][EU] 2x Obelisk DCR1 on: September 25, 2018, 07:35:54 AM

i'm selling my two Obelisk DCR1 (located in Germany) from Batch 1, anybody interested? Post or PM me your price, highest wins.

I'll update this thread with the current price.

Current Price: 100€

Best regards
3  Alternate cryptocurrencies / Mining (Altcoins) / Undervolting an AMD 7990 on: April 28, 2017, 09:18:21 PM

i finally got to installing my 7990 and it runs quite hot on stock settings :/

i have lowered the core clock a bit (1000 -> 900) and changed the voltage from 1.2mV to 1.0mV

its running fine now (60-70°C while mining zec with fans at ~80%)

my question: is it safe to just go lower and lower with the voltage (to keep the fanspeed lower), or can that physically damage the card?

4  Alternate cryptocurrencies / Mining (Altcoins) / Burned PCIe to PSU connector on: March 08, 2017, 07:28:22 PM

i just noticed a failed card (280x) wasnt dead but rather the PCIe to PSU connector was burned and i wasnt able to pull it out, the plastic has molten with the socket it seems.

the PSU in question is a Enermax 1000W ECO, this PCIe Connector was attached solely to that 280x, my question is: how is this possible? the card doesnt draw that much power and the cables seemed thick enough to handle a 280x
5  Alternate cryptocurrencies / Mining (Altcoins) / websocket for stratum connections on: March 04, 2017, 05:22:53 PM
Hi all,

i have written a small proxy nodejs script which will proxy standard tcp socket (stratum) connections to another proxy B which sends the data to a destination tcp socket (stratum) server.

i have done that to avoid same ip banning from nicehash for large ip ranges and i only have a metered internet connection at home so i just deployed it to openshift, thus relying on websockets instead of regular sockets.

is there any project using websockets already for stratum implementations, or is it just too much overhead ? i suppose it adds some overhead, but not that much


edit: im monitoring my reject rate with this setup, and so far it is zero (as it was without the proxy overhead)
6  Alternate cryptocurrencies / Mining (Altcoins) / automatic OC/UC with afterburner on: February 12, 2017, 12:31:09 PM
has anybody done that before, or is there a better way?

i have tested the following setup:

1) install afterburner and afterburner remote server
2) configure per miner clocks (and maybe voltages too, idk, i dont use that) somewhere (eg miner-manager)
3) make a http call to the remote server app to update the clocks
4) repeat 3) for each miner being switched

this should allow for automatic OC/UC depending on the miner being run and the gpu it is running on, also it works for nvidia cards too


7  Alternate cryptocurrencies / Mining (Altcoins) / stratum interception on claymore miners on: February 11, 2017, 11:36:02 PM
small academic question regarding stratum interception on claymore miners (and any other fee based stratum miner):

how can i test if the speed is staying the same as if not intercepting the traffic in the most efficient/fastest way?

probably i will have too hook the miner to some pool and check the 24hr avg with and without the interception, but will vardiff make this more difficult? i dont want to deploy to to multiple gpus, just one old 7870 i got lying around to test it, so hashrate will be kinda low

i have written a small nodejs app which acts as a direct proxy (it creates one connection per connected miner, not only one single connection) which replaces the authorization params with custom ones and listens on all the ports which the miner tries to connect to (which are routed to this machine via hosts file and nat reflection)

any suggestions and/or pools with good stats are welcome, i would prefer to use cryptonight

Disclaimer: i dont want to "steal" the devfee, just see if this really works, and if not why not

also if claymore reads this: please remove the nicehash stratum from devfee, it bans the addr when too many people connect to it (and thus lowers the hashrate because it cant connect), thanks
8  Alternate cryptocurrencies / Mining (Altcoins) / [ANN] Miner-Manager 0.0.3 on: February 04, 2017, 03:46:16 AM

this software has been around for some time, but i have not announced it yet, so here it is Cheesy

  • add groups, miners and pools
  • monitor miners via api stats if available
  • autoswitching pools (only nicehash currently)
  • stratum availability checks
  • pool priorities per group with failover if stratum not working
  • written in nodejs, update and reboot scripts for linux and windows (linux *should* work, however im using it only for cpu mining)


this is beta software, it might error, i just did some rework and there are probably some bugs to hunt from that

it now uses a stratum checker to enable failover with priorities for generic mining software as well as generic pool config for known miners (others will still have to type in their full cmdline)

as of now there is only a workaround if your miner does not connect to a stratum pool (you will need to create a dummy pool which is online and select that one as pool for the group) but is a standalone miner or something, will see when/how to ease that

also i have reduced the algos, if you require any just tell, i have added only the major ones

Disclaimer: im coding it mainly for myself/my needs, but however everyone is free to use it and modify it

9  Alternate cryptocurrencies / Mining (Altcoins) / cryptonight stratum specs? on: February 03, 2017, 11:43:53 AM

im currently writing a small program to check stratum availability and authorization status and it works for some algos i have tested at nicehash, even ssl/tls works fine

only cryptonight doesnt seem to work

i have read that the cryptonight "stratum" is stratum like and i have seen that there is a "login" param instead of "method" where you just seem to skip the subscribe part and go straight to "authorize"

im getting the following responses:

nicehash plain socket: connected and immediately closed after sending the req
nicehash ssl socket: connected and immediately closed after sending the req

miningpoolhub plain socket: connected and mostly timeout after sending req, sometimes it works and i get a job
miningpoolhub ssl socket: connected and mostly timeout after sending req, sometimes it works and i get a job

req im sending: req = '{"id":2, "jsonrpc":"2.0", "login":"'+worker+'", "pass": "'+pass+'", "agent": "stratumTest"}';

(note: \n gets appended afterwards)

what am i doing wrong here?

edit: ok nevermind, found the solution in the cpuminer-opt sourcecode:

req = '{"id":2, "jsonrpc":"2.0", "method":"login", "params": {"login":"'+worker+'", "pass": "'+pass+'", "agent": "stratumTest"}}';
10  Alternate cryptocurrencies / Mining (Altcoins) / x11 profitability rise on nicehash on: February 02, 2017, 06:57:29 PM
over the last days x11 stayed on a (much) higher profitability than before, obviously there is some new x11 coin somewhere that is getting mined, anybody knows?
11  Alternate cryptocurrencies / Mining (Altcoins) / list of open source devs and their contribution shares on: January 29, 2017, 12:02:53 AM

im looking for a list of open source devs that contributed to major opensource mining software

additionally a estimated % of total work done by the dev would be great


- Epsylon (40%)
- alexis (20%)
- djm34 (40%)

- Epsylon ...
- joblo

reason for this is im looking into setting my miners up with a donation "fee" for continued OSS support, very much similar to "donate by mining", but automatic

maybe the list of devs in the "dbm" ann is sufficient? but what about the distribution?

ideally im starting a miner cmdline each day for x seconds per dev (or even a single fund?)

it wont be much, my "farm" is small, but its a start

any suggestions are welcome

12  Alternate cryptocurrencies / Mining (Altcoins) / AMD XFX 7970 DD not working correctly on: January 23, 2017, 11:50:09 AM

i got an AMD 7970 which does seem to be broken of some kind.

It powers on, gets detected on some systems, on others it does not.

If detected and drivers are installed it runs for about 4 mins (load does seem to change this) and then the system blue screens with "Thread stuck in device driver"

i have tried multiple driver versions (15.12,16.3.2,16.12.2) and used Win7 x64 and win8.1 x64 (also fresh installs tested)

Does anybody have a clue what might be wrong with the card, and if it might be possible to fix it?

13  Alternate cryptocurrencies / Mining (Altcoins) / [WIP] Miner-Monitor: web dashboard with mining stuff on: January 13, 2017, 05:45:54 PM

this is a small web dashboard to display nicehash stats as well as miner stats on one screen

i became frustrated with having at least two web pages open with the corresponding stats and wanted the ability to partly control the attached miners from a single UI

it looks like this:


maybe this is useful for someone Smiley

Disclaimer: i just put this together out of various parts of previous projects of myself and im coding it for myself/my needs, but however everyone is free to use it and modify it (with say other pools dashboards or a pool picker to select pools dashboards to be displayed, custom miner repos or whatever you like)
14  Alternate cryptocurrencies / Mining (Altcoins) / [ANN] Baikal-Manager on: December 12, 2016, 12:39:04 PM
Hi everyone,

i thought i'd share this small piece of software with you, it's free to use and you can modify it to your liking. Suggestions, PR and such are welcome!

What is it:

  • add groups, mining devices (baikal miner) and pools
  • configure a list of pools once and deploy to baikal miners in the pools group with one click
  • get stats for each miner merged in one web ui
  • written in nodejs

the stats page is currently not intended for large farms as it would become quite messy.
the config page would also need some kind of rework for large farms i suppose to get things organized.

i have written this software as managing my currently 2 (and soon 4) miners when adding some new pool or switching to other pools became tedious.


15  Bitcoin / Bitcoin Technical Support / Unconfirmed Transaction with (hopefully) adequate fee on: December 02, 2016, 01:55:16 PM
The Transaction in question is here:

no Unconfirmed Input is being used and the fee should be adequate.

Anything else wrong with this transaction?
16  Local / Mining (Deutsch) / Sammelbestellung baikalminer on: November 29, 2016, 05:54:38 PM

hat jemand Interesse an einer Sammelbestellung? ich persönlich würde einen A-900 nehmen.
Grade durch die "buy four get one free" aktion bietet es sich fast schon an.

Mfg Felix
17  Local / Biete / [B] BTC in Darmstadt -- aktuell keine mehr on: November 11, 2016, 03:40:28 PM

ich biete aktuell bis zu 0 BTC in Darmstadt, ab 1 BTC zu verkaufen.

Preis entsprechend aktuellem Kurs.

18  Local / Biete / [VERKAUFT] Verkaufe 3x GTX 1070 on: November 09, 2016, 08:30:26 PM

ich verabschiede mich von mehreren GPUs:

1x Gigabyte GeForce GTX 1070 Windforce OC
2x Inno3D GeForce GTX 1070 Twin X2

Zustand der Karten ist TOP, keinerlei Problem mit Ihnen gehabt.

Preislich schweben mir 350€ vor, jeweils pro Karte.

Digitale Rechnung (Mail/pdf) ist jeweils vorhanden

Bezahlung in € oder BTC.

OVP nicht mehr vorhanden, falls das relevant ist.

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