Mining Calculator Bitcoin, Ethereum, Litecoin, Dash and Monero
Mining Calculator Bitcoin, Ethereum, Litecoin, Dash and Monero
Radeon R9 HD 7990 Ethash 36 MH/s Overview and ...
Bitcoin mining - Radeon HD 7990
Mining: technischer Teil - BitcoinWiki
5 Best Bitcoin Mining Hardware ASIC Machines (2020 Rigs)
Updated FAQs for newcomers
TL:DR: Don't bother mining if you want to get rich yo. You're way too late to the party. Welcome to the exciting and often stressful world of bitcoin! You are wondering what looks like a once in a lifetime opportunity to get rich quick. Of course you guys probably heard about this "mining" process but what is this? Simply put, a bitcoin mining machine that performs complicated calculations and when deemed correct by the network, receives a block which contains 25 bitcoins (XBT). This is how bitcoins are generated. So your brain instantly thinks, "Holy shit, how can I get on this gold rush?" Before you proceed further, I would like to explain the concept of mining further. Bitcoin is limited 21m in circulation. It is coded to release a certain number of blocks at a certain time frame, ie: this year the network will release close to 500,000 bitcoins. What this means is that the more people (or specifically the amount of mining power) mine, the less each person gets. The network tries to keep to this time frame through the process of difficulty adjustments which makes the calculations harder and this happens every 2 weeks. So every 2 weeks, you get less bitcoins with the same hash rate (mining power) based on what the difficulty changes are. Recently, the changes have been pretty staggering, jumping 226% in 2 months. You can see the difficulty changes here. Now, why are these changes so large? A bit of a simple history. Bitcoin's algorithm runs on SHA-256. This algorithm can be solved using many hardware, from CPU to GPU and dedicated hardware (Application Specific Integrated Circuits). When bitcoin first started, mining on CPU was a trivial process, you can pretty much earn 50 XBT (the block size then) every few hours between Q1 and Q2 of 2010. In late 2010, due to the difficulty increase that is reducing the effectiveness of CPU mining, people started to harness GPU mining. Only AMD GPU's architecture design are better optimized for bitcoin mining so this is what the community used. Immediate improvements of more than 10x was not uncommon. In time of course, GPUs reached their limit and people started to build dedicated. In the same vein as the CPU to GPU transition, similar performance increase was common. These ASICs can only perform SHA-256 calculation so they can be highly optimized. Their performance mainly depends on the die size of the chips exactly like CPU chips. In general, think of bitcoin mining's technological advancement no different to mining gold. Gold panning (CPUs) vs pickaxes (GPUs) vs machinery (ASICs) and we are still in the ASIC mining race. ASIC mining started with ASICMiner and Avalon being first to the market, both producing 130nm and 110nm chips. The technology are antiquated in comparison to CPUs and GPUs which are now 22nm with 14nm slated for Q1 next year by Intel but they are cheap to manufacture and with performance gains similar to the CPU to GPU transition, they were highly successful and popular for early adopters. At that point in time since there were less competing manufacturers and the low batch runs of their products, miners became really rich due to the slow increase in difficulty. The good days came to an end mid August with an unprecedented 35% increase in difficulty. This is due to existing manufacturers selling more hardware and many other players coming onto the market with better hardware (smaller die). Since die shrinking knowledge and manufacturing process are well known along with a large technological gap (110nm vs 22nm), you get an arms race. Current ASIC makers are closing in on our technological limit and until everyone catches up, the difficulty jumps will be high because it is just too easy to get a performance increase. Most newer products run at 28nm and most chips are not well optimized, so it will be around another 6 to 9 months before we see hit a hard plateau with 22nm or 14nm chips. The estimated time frame is because manufacturing chips at 22nm or 14nm is a more difficult and expensive task. In the meantime most manufacturers will probably settle at 28nm and we will reach a soft plateau in about 3 months. Now, you might ask these questions and should have them answered and if you have not thought about them at all, then you probably should not touch bitcoin until you understand cause you are highly unprepared and probably lose lots of money.
I read that you can mine with a CPU/GPU, should I do so?
No. If you have to ask, please do not touch bitcoin yet. You will spend more on electricity cost than mining any substantial bitcoin. Seriously. At all. A 7990 would produce a pitiful 0.02879 XBT (USD $14 @ $500/XBT exchange rate) for the next 30 days starting 23 Nov 2013 at 35% difficulty increase. And if you think you can mine on your laptop either on a CPU or GPU, you are probably going to melt it before you even get 0.01 XBT.
I get free electricity and I have existing hardware, should I still mine?
Probably not because you probably forgot that GPUs and CPUs produce a ton of heat and noise. You can try but I see no point earning < $20 bucks per month.
Should I buy an ASIC machine?
No, because your machine will probably not mine as much as buying bitcoins. This situation is called the opportunity cost. While you can still make money if XBT rise in value, it is a fallacy.
IE: if you start mining on 1 Dec 2013, a KnC Jupiter running at 450Gh/sec (KnC lies as not all chips run at 550Gh/sec) will yield you a total revenue of 9.5189 XBT with a profit of 0.7859 XBT in profit by 30th Jan 2014 at a constant difficulty increase of 35%. The opportunity cost is: 8.5910 XBT @ USD $580/XBT with USD $5,000 which is the cost of a KnC Jupiter. This is the best you can earn and it's a bloody optimistic assumption because:
You are assuming your pre-order will arrive on time. (I do not think any first batch pre-order from any manufacturer has arrived on time).
All pre-orders are sold out for 1 Dec.
You are assuming your chips will run at 450Gh/sec minimum but many miners here will tell you their chips have been under performing.
Electricity cost have not been taken into account.
Shipping cost and time has not been taking into account.
Import Tax or VAT has not been taken into account.
Risk of downtime due to DOA or warranties has not been taken into account.
You are assuming the difficulty increase will be a constant 35% which is very unlikely because Cointerra with a team that has worked on some of the world’s highest performance CPUs, GPUs and chipsets for NVIDIA, Intel, Samsung, Qualcomm and Nortel has pre-sold an absurd amount of hash rate. Difficulty increase of 45% or more (which we have seen when a small player, KnC shipped their 1st batch) will be repeated commonly. This is only 1 company, imagine what the rest will come out with. I have failed repeatedly and so have many in estimating future hashrate. You wont be able to do better.
Even if you earn some profit, it will be < 15% and will probably be not worth your risk or your trouble. I can buy and hold XBT with no risk of losing them.
The only circumstances where you will earn money is when XBT exchange rates is so high that it makes the opportunity cost pales in comparison. Unfortunately this is not the case. If XBT stabilized at 900/XBT today (20 Nov 2013) then we might have a good case. The risk is just generally not worth it. Unless you have at least a hundred thousand and can make a contract with a manufacturer for a lower cost, do not bother. Just wait until the arms race is over then you can start mining.
I understand I probably won't earn any money, I just want to do this for fun/hobby...
Okay, go buy an AsicMiner USB Block Erupter. They are cheap and pretty fun to have.
I want something with more omph and still do not mind losing money
Sure, just read the answer below on who NOT to go for. You are doing bitcoin a service by securing the network and you have our (the users') gratitude.
Who are the manufacturers?
You can check out the manufacturers and their products below along with a calculator here. If you still insist on buying, do not to go for BFL. Their track record is horrid and borderline scammish. KnC fucked up a lot with defective boards and chips. Personally, I think CoinTerra is the best choice. Alternatively, you can go on the secondary market to buy a delivered product. You can get a better deal there if you know how to do your "return on investment (ROI)" calculation. Personally, I will go for a 45%-50% difficulty increase for the next 3 months for my calculations and a 2% pool fee. However, most products on ebay are sold at a cost much higher than it should. bitcointalk.org is a cheaper place because everyone knows what are the true value is so you will find less options. If you are unclear or need assistance, please post a question.
Which pool should I use?
I actually do not use any of the pools recommended to the left because I think they lack features. My favourite is Bitminter (Variable fees based on features used; max 2%). It has all advanced features for a pool, very responsive and helpful owner on IRC. Variable fees is good for those who do not need a large feature set, even with all features turned on, it is still cheap. Eligius (0% fees) has high value for money but lacks features. It has anonymous mining which might be attractive to certain subset of people but not for others. Many other community member and I disagree highly with the opinions of the owner on the direction of bitcoin. I do use his pool for now but I do so only because I share my miners with a few partners and anonymous mining allows us to monitor the machines without using an account. Bitminter uses only OpenID which is problematic for me. BTC Guild (3% fees) is another big pool and is fully featured and does charge a premium for their fees. That said, they are the most stable of the lot. I do use them but do so only because my hoster uses them for monitoring. I try not to use them because a pool with a very large hash rate (they are the largest) presents a large vulnerability to bitcoin's network if compromised. All of them pay out transaction fees.
One of my friends friend is selling two 7990's for 120 each. They are both used, pretty decently overclocked, and were pretty regularly used for bitcoin mining. They were bought when the were released. Thanks for any advise. Edit: forgot to say it was a friends friend.
I was using the bitcoin wisdom litecoin calc which takes into account difficulty rises. If you put in a rise of 10% (this is a very conservative estimate!) it takes infinity time to recoupe money spent on a 7990 and that assumes it runs at 375w but in reality it will run 500+w. Then take into account other costs like electricity and fees on exchanges, the price of the coin dropping, it seems like you are betting everything on the resale value of the kit. Now if you think that asics for litecoin arrive in 5 to 6 months then gpu mining has that time as a maximum to recoupe investment. Also there is no point mining assuming a price rise will make it profitbale. It would be better in that case to buy coins with your money and not hardware. Therefore I can't see anyway that makes sense that anyone would bother to mine unless their hardware is paid off and electricity is free.
So I've invested a rather large sum of money into a quad 7990 rig, and as much as I want to see it run Crysis, it's going to be put to work mining Bitcoins! Sadly, I have grossly underestimated the cooling requirements of these cards, and I have wasted upwards of 500 bucks in different attempts. (A/C, custom ducting, etc) I've decided to bit the bullet and water cool this thing. Unfortunately, even for water cooling this is an extreme job! I had a friend of mine who knows a little on the subject put together a build for me. The build is here: https://docs.google.com/spreadsheet/ccc?key=0ArvTXe6MGFbLdDlod0tWV1pGVEFvWklDV3ZsWDdwSVE#gid=0 I need to know:
Will this actually succeed at cooling 4x 7990?
Are all the chosen parts actually compatible?
Will this pump work with such a large radiator etc?
How far could I run tubing with that pump? (I'd like to put it outdoors, or up high in a window)
Can I daisy chain radiators? like, choose two radiators about half size? (Would fit my window better)
I don't know much about the subject obviously, so any input is appreciated!
tl; dr: We aren't taking enough advantage of the community to make doge, the coin available to all. I argue that the only reason many are still here, even now, is for the meme, not the coin. Problem-> big players with lots of money mine doge, sell 4 bitcoin. who has doge? Not you and me. this is bad Every person that has a computer has dedicated or integrated gpu. I propose moving doge back to GPU usage. Please read extended if you wish to decry me or bring up a reasonable discussion. (rambling) Ever since ASICs came into play, I gave up mining on my GPU, sold it, and went to my old ati 4850 card. I just wasn't excited any more. I wasn't involved. This is one of my attempts at spurring a solution to a primary problem- not only is the 51% a problem, but for the future of the coin, who has doge is the real problem. I'm not the only one that's felt this way, i'm sure of it. It's only because of DOGE that i even learned about bitcoin/cryptocurrency. The question of "how do i mine?" in bitcoin usually gets "if you're not using an asic, don't even try" - ltc and doge were different. Not any more. Our hashrate has fallen as well. It makes no sense to get into doge right now. (/rambling) "But doge is cheap! Just buy some on an exchange!" That doesn't solve our problem of a potential 51% attack from a motivated thief, and it only creates yet another barrier to entry. Not everyone wants to go onto an exchange or purchase an asic for a coin that could be screwed over at any moment. ESPECIALLY when if they sign up for an exchange they can just buy bitcoin which can be used for so many more things. Doge's hash rate and value per mined coin has been in the dumps for a long time. Litecoin miners etc, have abandoned their GPUS and are selling them in droves on ebay for cheap. With reasonable amount of investment, a larger portion of the community can mine. If we do this right, I think we can bring back doge, as a COMMUNITY. Gpu's are cheap again, you can find many high-tier gpu's on ebay for less than msrp (significantly less) (a 6 GB 7990 is 400 bucks. it used to be over 800). Solution: move to Gpu-heavy algorithm and get community able to mine the coin again. Value will go up as we trade with each other. Screw exchanges and exchange rates. That's not the only way to benefit from mining the coin. If I could trade with someone all of my doge for alpaca socks in the amounts that I can afford, I'mma buy alpaca socks with it, gosh darn it. I ALSO recommend with that, extending the remaining halvenings, and considering increasing per-block payout, so community members who will keep and actively trade the doge, will get into it. It's so cheap that I think we have a while until we'd have to worry about GPU farms mining doge. Promises: I promise that if we get GPUs relevant again or some way to give the community MORE COIN than ever before (like every individual subscriber to this sub holding 100,000 doge), we will have more individually spread out coin than ever before, meaning more people have doge, meaning doge stores can make more money. You have to disseminate the coin for it to be used. If only ASICs can do it then we're limiting the number of people that can get into it via mining, however small. I hope you understand what I'm trying to get at here.
3 rigs, 4x7950's per. Questions regarding System Ram to VRAM, Powered risers to unpowered, and power consumption.
So Like everyone else and their mother I was speccing out a system to bitcoin mine when I stopped lying to myself and came to the conclusion ASIC's will ruin me within two weeks IF they do come out (BFL). So instead, seeing that LTC are going to MTgox in a short while I figure I should mine those while ASIC's aren't in the picture and shouldn't be for quite some time. Now to the build questions.
How does system RAM factor into LTC mining? All I ever hear is "it matters, but I don't know how much or why" or "You want an equal amount of system ram to the GPU VRAM, but I don't know why" It would help for me to know why I'm doing this.
In what situations do I need a powered x1 to x16 riser cable? From the few sources I've been able to find, they just say it's only needed for GPU's with 2 cores, like 5990's, 6990's, and 7990's. OR motherboards what don't send enough power through the PCI-E slot.
4x7950's on a single 1200w PSU shouldn't be an issue, correct? @145w x 4 = ~580w @200w x 4 = ~800w for just the cards. I feel like I'm wasting money on that PSU if the total system wattage under full load is so low.
Like everyone I'm going with a 145 semp, the mobo I plan on getting is an ASUS M4N75TD I shouldn't have any problems theoretically with a configuration using two x16 to x16 risers and two x1 to x16 un-powered riser adapters for the other two cards right?
Thank you very much for any assistance you're able to give me. If I had LTC to tip I would. Brown Edit: Formatting, and added build belowEdit 2: fixed some calculations 7950x1 @ $290 7950x4 (per rig) @ $1160 7950x12 (all rigs) @ $3480 7950x4 @650kH/s ea @200w ea = 2.6MH/s total, 3.25kH/J w/ 3x4 rigs 7950x12 @7.8MH/s total Per Rig Cost: ~$1550 ea ~960w total ea = 1.67kH/$ 3.25kH/J All 3 Rigs Cost: ~$4260 ~2880w If I can I'd like to make this a bit more power efficient, so if anyone has any suggestions please, let me know. (I included an additional 100w and $100 into the price of each rig just in case.)
I've been mining on my 6850 for a few months and I've decided that it's pathetic. I understand that "when ASICs arrive" it will change the entire mining ecosystem, but given the perpetual delays in shipping (at least from Butterfly Labs), I want to build my own GPU powered miner. I have about $4k USD to put into a system (or multiple systems if that's a better idea) and I'd like it to hit at least 3.5 Gigahash/s. So here's my questions: 1) To keep the machine viable as long as possible, it needs to be power efficient. The numbers I've seen on the new 7990 put it at about 1.2 Ghash for 375 watts of consumption (https://en.bitcoin.it/wiki/Mining_hardware_comparison and http://www.tomshardware.com/reviews/radeon-hd-7990-review-benchmark,3486.html) - 3.2 Mhash/watt. Would I see better efficiency numbers from a different card? 2) I understand that mining does not require the card to be in a full speed PCIe slot to get optimal hashing power. If I use a 7990, is the fact that it is a Dual-GPU card going to require more than a 1x PCIe slot? Or, more specifically, how much bandwidth does hashing require per Mhash/s? The answer to that question leads to the last question - 3) If I build a setup with a backplane for additional PCIe slots, how many slots could I realistically add before Windows 7 Ultimate x64 fails to recognize the devices or otherwise derps out? I'm not against setting up with a Linux based system, I just haven't seen appropriate drivers available on that platform. (Side note - do I NEED Catalyst drivers to run an OpenCL miner?) Any advice or information on suggested builds would be appreciated, and I'll tip helpful people. Thanks!
Hey guys, (redditors and such) i'm kinda stuck here. See, i need cooling for my 7990, i do a bit of bitcoin mining, and since i've had some problems with liquid cooling, i don't fancy doing that again. I was looking into some Arctic cooling, but i'm not sure if it fits my 7990.
For Sale: XFX Radeon R7950 Ghost GPU on cryptothrift
For Sale: XFX Radeon R7950 Ghost GPU on cryptothrift for cryptocoins Tags: Radeon 7950 290 mining GPU 7970 7990 nvidia r7950 5870 cryptothrift is a Bitcoin, Litecoin and altcoin marketplace and auction site with automated escrow.
[Build Help] Go big or go home; multi-use machine with room for future growth
Per the title, I want to put together something for a variety of purposes, and be able to add on as time goes on. Uses for the machine:
Compiler: I went for the hexacore i7 since compilation of large projects scales almost linearly with more threads. I do software development both professionally and for fun, so I'll always have lots to compile.
Server: I have a few services I run out of my apartment: HTTP, SSH, Git, etc. Nothing too major, but more threads will be nice there.
Bitcoin Miner: I love Bitcoin, so I mine mostly to support the network and not for profit. That doesn't mean I don't want lots of hash-power though. I anticipate dropping another high-end AMD card in the future as well.
I won't be doing any serious gaming.
The 6990 is just a pricewise placeholder: I'm waiting for the 7990. If they're hard to come by, I'll probably start hunting for a second one soon after building the rig. Although, since I don't need Crossfire for mining with multiple cards, I suppose I don't need to have matching cards. The three 1TB drives are for a RAID 5. I currently have a slow 2TB drive that I'm going to use for weekly backups. I may add an SSD just for those really fast boot times. I was going to go for three monitors (the (6/7)990 can drive four, yes?) but I don't think I have the desk space. Maybe someday, just to feel like I'm commanding a starship. Any and all criticisms, suggestions, and substitutions are welcome. Part list permalink / Part price breakdown by merchant / Benchmarks
7x Radeon HD 7990 Mining Monster V2 Rig (14 GPUs) Mining Rig Rental (X15 Algorithm - 31MH/s): http://goo.gl/XCRciR Mining Monster Rig Review: http://goo.gl/W... Crypto Mining Farm, 1070, 7990, 1080ti Crypto Mining. Loading... Unsubscribe from Crypto Mining? ... 2017 Bitcoin Mining at Scale - Introduction - Duration: 30:58. Block Operations 12,508 views ... Super Custom BitCoin/LiteCoin Mining Rig 2.0 - Tech Tips - Duration: 7:44. ... Mining Rig with Radeon 7990 HD - Duration: 7:32. Mooze Production 8,448 views. 7:32. Radeon 5850x4 bitcoin miner ... In this Video I build a Mining Computer with two friends. It can create Litecoins, Fastcoins, Galaxycoins and so on! The Rig: Radeon XFX 7990 HD Graphiccard AMD Athlon II 3.4 GHz CPU 4x2 GB DDR3 ... You will see how easy it is to make your own Litecoin mining rig with a single 7990 GPU. You can easily get greater than 1.2MH/s performance with a Powercolor 7990 GPU. LTC donations welcome ...