11
There are several options for Mining Bitcoins some of these are no longer profitable, but for the sake of being thorough here they are in order of efficiency lowest to highest:
Methods
CPU Mining (minerd)
GPU Mining (cgminer, bfgminer)
FPGA Mining (Custom software - https://github.com/fpgaminer/Open-Source-FPGA-Bitcoin-Miner)
ASIC Mining (cgminer, bfgminer,...
7
Yes, this is related to GPU mining. From cgminer's README:
INTENSITY INFORMATION:
Intensity correlates with the size of work being submitted at any one
time to a GPU. The higher the number the larger the size of work.
Generally speaking finding an optimal value rather than the highest
value is the correct approach as hash rate rises up to a ...
6
The higher difficulty means you will be reporting results less frequently to the pool. This reduces network load on both your system and the pool. It also reduces the restart delay for your mining hardware as it prepares for the next work unit. Most pools base the rewards on the number of difficulty 2 shares accepted. So they increase the reward based on ...
6
I was confused by this as well, but I figured it out through trial and error. AM means arbitrary message (they should have explained this), which is a regular message you send to the forging pool through your wallet.
First you must join the forging pool (Account Balance -> More Info -> Account Leasing). No additional message is necessary at this point.
...
6
The setgenerate built-in background miner was removed.
There is however still a test-only on-demand miner, which will try to mine N blocks whenever requested by RPC (see generatetoaddress /generatetodescriptor/generateblock RPCs in recent Bitcoin Core versions). It is many times less efficient than even the built-in CPU miner was. Its only purpose is in ...
5
The miner you are using does not support the stratum protocol. Instead you must use a pool that uses the old and now obsolete getwork protocol
If I see it correctly BTCGuild still offers the getwork access with the following URL:
minerd.exe -o http://btcguild.com:8332 -u username_1 -p password -a sha256d -R 2
5
You need to be online because mining is sort of like a mathematical race: whoever finds the hash of the next block (with value less than the current target) wins. And in order to prove that you found this value before anybody else, you need to be online in order to broadcast it to other users.
5
Bitcoin is a gossiping network. There is no hierarchy among the nodes, each node operates at equal privilege level. Bitcoin has an established protocol defining how nodes communicate with each other, and some stepping stones to find the first peers (although they could easily be replaced by other on-boarding mechanisms).
Whenever a node learns new data on ...
4
I know this is an old question but recently I got a similar server.
I've tested rpcminer, GUI Miner (Which is actually UFASoft miner).
Personally the best I've found is CPUMiner. With a hash rate of about 75MH/s, it takes a bit of setting up as CPUMiner is normally used for Litecoin mining. CPUMiner gave me about 10%-20% more than the closest rival, which ...
4
If you are after bitcoins I wouldn't even spend time on CPU or GPU. It is now difficult with specialized hardware (butterfly labs, kncminer ... ). You can have a look at cloud mining (cexio) as well it is expensive and you have to have bitcoins already but you can buy and sell GH/s and you can actually make more from trading than mining.
4
If you are mining bitcoins successfully, then don't worry about it.
There's no need to install the SDK. OpenCL drivers are included with AMD's Catalyst drivers.
Also note that solomining on a GPU could mean you never make a single coin. It may look like now that it will take a couple years, but by that time the difficulty is much higher. Unless you are ...
4
You should use multiple workers if you want separate statistics for them, or if the pool you are using limits the number of connections that are allowed per worker.
4
With the advent of ASICs, Bitcoin GPU mining is no longer profitable. I would recommend mining a Scrypt coin such as Dogecoin or Litecoin. (You can then trade it in for Bitcoin on an exchange, if you prefer.)
To answer your original question, yes, you can use one card for mining and the other for actually running the computer.
4
I would highly recommend using Ubuntu Server for this, as long as you know what you are doing without a GUI. Not having a GUI at all means smaller OS size and much less OS tasks. This translates into more power savings. If you are using graphics cards, a non-GUI OS will improve your mining performance. If using an ASIC/etc. you probably will not see ...
4
Even on testnet the difficulty is sufficiently high that it will take you a long time to mine anything using cpu. (Lots of people testing ASICs, presumably.)
Your best bet is probably Testnet in a box. Then you can cpu mine just by using ´setgenerate true´ in Bitcoin Core.
4
In order to be able to calculate the nonce for the next block you need all the information from the last known block. The time between the blocks is 10 minutes in average, so if you stay offline for more that 10 minutes you will not be able to perform any valid calculations and essentially you will be in a solo, forking mode, solving the wrong block.
4
If you look at recent blocks on https://blockstream.info/ (as of today, Aug 15 2020), nearly all blocks are very close to 4000 kWU. The variation is due to availability of sufficiently small transactions to fill up the last part, and differences in selection algorithms.
Occasionally, an empty block appears instead. These happen as a result of pools learning ...
4
Yes. Bitcoin Core has a RPC submitblock, which, as the name implies, allows you to provide a block to be submitted to the Bitcoin network.
In fact, Bitcoin Core supports the getblocktemplate protocol which means you can solo mine with Bitcoin Core. Furthermore, pools are probably running Bitcoin Core in their backend and their pool software just uses the ...
3
What you describe is tunneling through SSH. Assuming you can connect to an SSH from the servers (outgoing TCP port 22 is allowed). A is the machine you want to run the miner on, B is the SSH server which we use to tunnel the traffic through (this has to be able to open connections to the mining pool) and C is the hostname of the mining pool you want to mine ...
3
OpenCL is not supported on 3xxx series cards. Although it's not completely impossible to mine on a card that old it will be very difficult. Also, a card that old will produce less than 1 MH/s which will only be fractions of bitcoins. I wouldn't waste my time fighting the Radeon 3600.
If you are serious about mining check out the 5xxx and 7xxx series ...
3
The original question was [sic] "What is the fastest CPU miner that I could use". Based on the answers, it seems, that everyone by default went to cpuminer/minerd. I use it also. However...
bfgminer (all except the latest version) has the ability to be used as a cpu miner. I have not been able to optimize mine yet but I do know that it is an incredibly ...
3
Warning: doing what is described below will not gain you any coins at all with exceedingly high probability, and just burn electricity (see other answer).
Bitcoin Core still has a built-in miner. It is not efficient, not optimized, does not use any special hardware (like special CPU instructions, GPUs, FPGAs, or ASICs), and is only useful for testing on ...
3
This is covered in the included README document.
3
One instance of minerd is all you're going to need. The application also synchronizes with the pool. So opening more than 1 instance of minerd is just going to cause your network to be used twice for the same information. Also, the operating system has some overhead for running the application. Opening another instance will mean more overhead and thus less ...
3
The answer depends on whether you're using a pool to mine.
If you use a pool to mine, you don't need Bitcoin-Qt to mine, so you can mine straight away.
If you don't use a pool, you need Bitcoin-Qt to be at the most recent block.
3
Bitcoin mining is principally an integer maths task, not a graphics task. It just so happens that the hundreds of processors found on modern graphics cards can sometimes be suitable for parallel calculation of the bitcoin task, at upwards of a hundred times the best available rate from four cpu calculations.
See wiki reports on bitcoin hardware for ...
3
to determine if they're being detected properly, use the 'lsusb' command.
Here's what they should look like if your system is detecting them properly (I run mine in a VM running Ubuntu:
$ sudo lsusb
[sudo] password for majorminer:
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus ...
3
Most miners now use Stratum, but the old getwork protocol isn't completely gone yet.
The URL is the root path (/) of the server usually at port 8332, for instance http://mint.bitminter.com:8332. You can see what the data looks like here: How can I code a Bitcoin JSON-RPC "getwork" request in Java?
No, this is JSON-RPC. It's an RPC-style interface, ...
3
Your intensity is very low (I:8) - dynamic intensity does not work well with scrypt. You will need to increase it manually. You can set a value to use when starting the program by adding --intensity 13 to your command line options/batch file. Replace the number 13 with the desired intensity. For a HD6850, I suggest you try values from 10 to 15.
If ...
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