Questions tagged [cpu]

Questions about Bitcoin in the context of CPUs (as opposed to GPU or ASIC mining)

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Why is the rate of reindexing chainstate not constant?

What determines the speed of the reindexing-chainstate in the different times? I spend a few days (2 week) for reindexing locally on my new HDD, and I noticed one thing: the speed of reindexing is ...
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I mined in early 2010 with a cpu miner and just found my keys after forgetting all thease years, no joke need info please

who is the best most reputable bitcoin recovery company? I have added details and questions about our situation below Thank you And God Bless what was the mining program from the devs back then? I ...
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Is it technically possible to solo mine bitcoin using cpu without a pool? How? Ubuntu

For development reasons I'd like to have a private "real" bitcoin mainnet network. Bitcoin-core doesn't support mining any more. I have set up a network of 2 nodes (using connect conf command). ...
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CPU mining Core 2 Quad Q9550

I am new to mining and not actually mining Bitcoin right now but want to understand more about it. I have Core 2 Quad Q9550 CPU at 2.83 Ghz. I am mining with cpuminer only right now. I am getting 20 ...
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Can a Bitcoin ( or any other cryptocurrency ) be compromised with a large botnet/s?

I'm new to cryptocurrencies, so I recently read the paper from the Satoshi Nakamoto ( link is here ) to know a little bit more about the Bitcoin.And I saw this statement: What is needed is an ...
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CPU mining in the background

I am thinking of doing cpu mining in the background when users are on my website. Also I am thinking of building a program which does everything in the background(cpu mining), that users can download ...
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CPU Mining Test with CGminer

After my boss read the websites mining on visits he got the idea to use the entire network we have access to. I have access to 3000+ computers and have been give permission to run a test over the ...
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cpu, ram or bandwidth -- what is most important for bitcoin mining?

[I know Bitcoin mining on a server is a losing proposition, consider this an academic question.] I've got some old proliant rack servers and VMWare licenses and thought I'd put them to use mining. ...
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How to tell bitcoind to use more memory and CPU

I just updated my node to 0.12 and its going through its long verification process but I noticed that its not using very much memory/cpu pi 602 10.5 19.4 352220 184312 ? Ssl 21:57 1:...
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5 answers
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GPU mining slows down my ubuntu

I'm trying to mine using my CPU and GPU. When the CPU is set to use all its cores, I have no problems, but when I use my GPU, my desktop gets way too slow because unity uses it too I think, so I need ...
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I need to find a pool that supports cpuminer

I've been to mine with cpuminer with lots of different pools but nothing works!!! I only made it to mine litecoin on litecoinpool.org, but I need bitcoin! Which pool would you recommend?
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Is it possible to win the Bitcoin lottery?

If you have a PC and you try casual solo mining on your PCs CPU is it theoretically possible to mine a block and get the full block reward if you get really lucky? I know this is extremely unlikely ...
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How to allocate hash power to an instance of bitcoind?

I'm not sure if those questions were asked this way before but ...: Is it possible to allocate CPU resources/hash power to an instance of bitcoind run on regtest?If yes, how? Assuming I'm going to ...
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11 votes
1 answer
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What mining performance can we roughly expect from the Intel SHA extensions of the upcoming Skylake processor architecture?

Intel is scheduled to release their new x86 SkyLake microarchitecture in Q3 2015. Among other interesting features, it will introduce SHA extensions that will allow hardware acceleration of the Secure ...
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How can i set up CPU mining on bfgminer?

I just downloaded Bitcoin Core and BFGminer on linux and I would like to start CPU mining just to see how it works, maybe later I'll buy ASIC. So, how can I configure CPU mining on BFGminer?
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Using Ufasoft miner with 50BTC

So I decided to take a look at this bitcoin stuff. I would like to test Ufasoft for CPU mining. Don't really care about performance. There is this nice guide: https://50btc.com/en/articles/view/68 ...
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Does CPU mining become efficient as memory requirements increase?

I am focusing on an anti scrypt coin called Vertcoin which increases it's N-factor at a set interval. On their main page on bitcointalk it states that CPU computation will make gains as N-factor (...
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Best strategy for using hundreds of 1 kh/s CPU litecoin miners

Some friends and I currently run a webapp and we rent 50 dedicated servers that run a few dozen linux VMs each. During the night they are not used a lot so we thought we could use them for cpu mining ...
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Configure CPU Scrypt miner

I've decided to give 42coin a shot with CPU mining but the CPU miner that I've found doesn't specify how to configure it. It DOES give you the parameters though. I'm not sure if I should add a .bat ...
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1 answer
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Reindexing of blockchain using bitcoin qt v8.5 using 427% of Macbook CPU

My bitcoin qt client v8.5 crashed last week (I had already got full blockchain indexed a long time ago) and I had to force quit it. It's now re-indexing the blockchain but using sometimes up to 427% ...
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2 answers
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Specify which CPU threads are used using cpuminer

I'm using the latest version of cpuminer on a quad core cpu. How can I tell it which physical cores to use, 2 threads uses 1 and 2 but I want it to use 3 and 4 instead as I have other things using ...
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Scrypt (Litecoin) memory / performance tradeoff

For Litecoin, if memory size is increased in processing the Scrypt algorithm, for example to 384 kB instead of 128 kB (and assuming likewise an L2 cache size of 384 kB), would the typical CPU ...
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2 answers
866 views

How long to earn fractions of bitcoin [duplicate]

I started mining today, and I'm using the bitcoin GUI miner, along with rpc2013-cuda. I'm running algorithms on the CPU(completely maxed out - It's a core i7 quad-core/Hyperthreaded at 2.3GHz) and the ...
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Can I mine with an E5 2620 CPU? [closed]

I plan on mining litecoins, but I'm somewhat late and new into the game. Would it be better for me to get a video card later, tight on budget? I'm not sure how to do the math. There isn't any ...
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2 answers
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cpuminer json rpc call failed [closed]

root@i-M116V:/var/www/cpuminer-2.2.3# ./minerd [2013-12-27 15:22:35] 2 miner threads started, using 'scrypt' algorithm. [2013-12-27 15:22:35] Binding thread 1 to cpu 1 [2013-12-27 15:22:35] Binding ...
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1 vote
1 answer
475 views

Parts of a Bitcoin Mining Rig

Original question: How important is a strong CPU and GPU for ASIC mining? I would assume that the GPU could be a cheap one because even if its high-end it probably won't help, and that the CPU should ...
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2 votes
4 answers
7k views

LTC mining is better than BTC mining?

I've got a notebook with these specifics: CPU: AMD Phenom X3 II N830 3.14GHz (3-Core) GPU: ATI Radeon HD 5650 1GB Mining 1 LTC is faster than mining 1 BTC? How I estimate the times for BTC and LTC? ...
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5 votes
4 answers
33k views

Should I mine bitcoins or litecoins?

I don't pay for my own power, but I have two problems mining. I am CPU mining at 250 mhash/s because my AMD Radeon HD 7800 series graphics card will only produce 4.0 mhash/s (the other problem I'm ...
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3 answers
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Bitcoin is using +90% CPU power using Ubuntu 12.04?

I am using Ubuntu 12.04 and Bitcoin client v0.8.6.0-g03a7d67-beta and Qt version 4.8.1 as the GUI. My CPU is heating up and is automaticly shutting down after 30 minutes and sometimes after many ...
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3 votes
1 answer
11k views

Is mining bad for the CPU?

I've started to mine some Primecoin on a couple of spare VPS's, and it's turning out to be profitable. I'm also mining a bit on my laptop when I'm not using it (e.g. during lunch break). Will mining ...
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3 votes
2 answers
940 views

Can bitcoind still do CPU-based mining or was that feature removed?

I'm seeing conflicting claims about whether bitcoind can still do CPU-based mining. As far back as 2011 people were saying that feature was going to "soon" be removed. Was mining removed? By the way ...
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2 votes
1 answer
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Which coin to mine with CPU long-term [closed]

I have a machine with 48 CPU cores, running Linux. I would like to mine for a coin, not to sell immediately, but in several months when the value has increased (hopefully). I don't want to keep ...
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5 votes
3 answers
35k views

CPU Mining: Optimal Number of Threads

(I guess this question in principle applies likewise to Bitcoin, but given how un-profitable CPU mining of Bitcoin seems to be, this question actually arose with regards to Yacoin mining). I am ...
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6 votes
4 answers
18k views

Running a command line bitcoin CPU miner on ubuntu for slush's pool

I don't intend to do this long term as I am pretty sure the cost of the power would exceed the earnings, this is more for educational purposes. What I'm looking for is a command line miner for Ubuntu. ...
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Hashrates for Opteron and Xeon CPUs

I'm looking for the benchmarked hashrates of both a 1.0GHz Opteron 2007 CPU, as well as a 1.2GHz Xeon 2007 CPU. I looked here but didn't see them mentioned. Also, on that references page, I don't see ...
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1 vote
3 answers
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Mining computations by the numbers [duplicate]

On average, how many "computations" (GPU computations, CPU computations, CPU cycles, etc.) does it take to solve a block ("win" a mining race)? What are these computations measured in? Operations? ...
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1 vote
3 answers
3k views

Does having the Bitcoin Client running always use up a lot of the CPU?

I have the Bitcoin Client running on my laptop, it is up to date and now fully synchronised, but it is running the CPU at almost 100% and so makes doing anything else extremely slow. Is this normal? ...
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14 votes
2 answers
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How to configure CGMiner with CPU?

I'd like to start mining Bitcoins on a CPU for testing purposes. I've downloaded CGMiner, compiled it and created a config file without any problems, however starting it results in an error message: ...
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The bitcoin miner lags my cpu 99% and how i will earn bitcoins

Bitcoin Miner program uses my CPU 99% can you just little make it no laggy and how do i earn bitcoins? in the internet sites and forums they dont sya anything about earning bitcoins
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5 votes
1 answer
402 views

Is there a bitcoin market for CPU time / memory space / disk space?

Bitcoin mining pools are like lending / borrowing cpu time, but it's only for hashing. Is there something more general; a market where you can lend and borrow cpu time, disk space and so on?
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4 votes
1 answer
988 views

Does Bitcoin-QT use more CPU when its idle than during synchronization?

I am running the standard client on a micro Amazon EC2 instance. When I am synchronising Bitcoin with the network, it uses about 50% of the available CPU. After it is fully synchronised, I leave it ...
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