[Build Help] Dedicated Rig with 4x 7970 or 4x 7950 for Bitcoin Mining. [x-post from /r/bitcoin]
Hey Guys, I built my first rig using the advise you guys gave me - a GTX680 gaming rig. It is however extremely inefficient for mining Bitcoins and other cryptocurrencies. I wish to build a great ATI rig and put together two different set ups which essentially come down to a 4x7950 vs 4x7970. (it's almost impossible to get a 6990 let alone 4 of em). Here are the tentative builds here. (I used pcpartpicker) 4x7970:  http://pcpartpicker.com/usedracodraconis/saved/1snT 4x7950:  http://pcpartpicker.com/usedracodraconis/saved/1sqM Note that while the 7950 setup would have a lower hash rate, it also uses about 200W less power overall. I suppose, this may have a net benefit on electricity savings in the long run. I am willing to spend a good amount of cash in pursuing this but want to be prudent about it as well. Would there be any way to optimize either build even further? I.e. cost savings/performance boost etc? Also, is there a need for a riser card with my specific mobo? Will there be any notable difference in performance with/without it? If so, is there a particular brand I should get? For reference values on bitcoin hash rates, see here:  https://en.bitcoin.it/wiki/Mining_hardware_comparison It might seem like a pity to hook this up to a monitor and game on it, so I might do that at some stage :) Here is the thread on /Bitcoin Also, do you guys know of any video tutorials which show how to set up a 4way CrossFireX system? :D Thanks for this guys, and apologies for the long post! Cheers!
4x 7970 or 4x 7950 build for bitcoin mining + other considerations in view of BTC + LTC fluctuations.
Hey Guys, It seems like my post didn't get any love on the generic  /litecoin subreddit, so hopefully you guys will be able to help me out. I wish to build a great ATI rig and put together two different set ups which essentially come down to a 4x7950 vs 4x7970. (it's almost impossible to get a 6990 let alone 4 of em). Here are the tentative builds here. (I used pcpartpicker) 4x7970:  http://pcpartpicker.com/usedracodraconis/saved/1snT 4x7950:  http://pcpartpicker.com/usedracodraconis/saved/1sqM Note that while the 7950 setup would have a lower hash rate, it also uses about 200W less power overall. I suppose, this may have a net benefit on electricity savings in the long run. I am willing to spend a good amount of cash in pursuing this but want to be prudent about it as well. Would there be any way to optimize either build even further? I.e. cost savings/performance boost etc? Also, is there a need for a riser card with my specific mobo? Will there be any notable difference in performance with/without it? If so, is there a particular brand I should get? I have also been lurking on this subreddit and was considering using BAMT vs a barebones windows installation with TeamViewer for remote access. Also, on a slight tangent, this setup is going to cost almost 2.5k so would it make more sense to 1) just get a BFL rig that will do 50g/hash? My points against getting a righ like this are that it'll take forever for them to deliver (late July early Aug??) and who knows what the state of the economy will be by then, whereas I can potentially build this system over the weekend. 2) invest directly in LTC or BTC (just seeking opinions here) Thanks for this guys, and apologies for the long post! Cheers!
How much bitcoin could have have mined back in 2014 with a Radeon 7970 3GB?
I used to have a PC with a Radeon 7970 3GB OC version sitting idle in a air conditioned room back in 2014. I never thought about putting it to work back then. I am wondering how much bitcoin I could have mined with this card between 2014 until 2016 if I had it run 24/7?
For sale: 2x Power Color HD 7970 - $75 Each 3x Gigabyte HD7970 - $75 Each Because some people care - This was part of the first mining rig my company ran. They mined Bitcoin directly before Asics were created. After that they sat in a Closet and honestly we just forgot about them. So they have been sitting for quite a while. I couldn't tell you how long. 678 Cases: The case measures 6.5” tall x 7.5” D x 8.5” W. (Get it? 678….) The entire case is approximately 6.78 Liters. Boasting a unique bolt together design, and an all steel construction with ample airflow it provides excellent heat efficiency. Every 678 Case is industrial powder coated for extreme durability. If you want the smallest PC possible with a discrete GPU and power supply built in, the 678 case is for you. So join the 678 family today! Colors: Gloss White, Textured Black, Black/Green Max component sizes: Motherboard – ITX Form Factor Power supply – Small Form Factor (SFF) required GPU – Length: 183mm / Height: 130mm CPU cooler – Height: 60mm Hard drive – No 2.5” or 3.5” Hard drive mounting is provided – m.2 is recommended External Fans – No external fan locations Water cooling – Not even remotely possible What is in the box?
Will I earn money by mining? - An answer to all newcomers
When people start their adventure with Bitcoin, they often go through a small gold fever with the concept of mining (I would know, that's how I started ;) ). Here is a small guide to answer your eternal question "will I make money with it?": First of all, lets talk about hardware (click on the link for a long and useful list). You won't make money mining bitcoins unless you either have a really high-end GPU from ATI, an FPGA or an ASIC. That's the short answer. Having a decent CPU can be used for Litecoin mining, which can be a small income in itself, but we are here to talk about Bitcoin. To see whether you will earn any money, you need to input a few pieces of data into a special calculator:
cost of your hardware (cost of buying an ASIC, GPUs, motherboards, power supplies, etc.)
how fast can it hash (mega hashes per second). This you can get from your hardware list
your cost of electricity (check with your power company)
And then there are two magical variables that will either make it all work out, or be doomed for failure: * difficulty - it is automatically filled in by the calculator, but for long-term mining (more than a few weeks), you want to be a pessimist. Multiply the value by 10 for predictions over a few months or 100 for a year or two (it will rise steeply soon) * bitcoin price - also filled by the calculator - it might go up or down in the future, affecting your bottom line. It will probably increase in the long run, but lets be pessimistic and lower that to $10-$20 to make sure we are earning money no matter what Having all your hard data and your guesses on the last two variables, you put it all into the mining calculator and see what you get. You will get your earnings in BTC and dollars, as well as summary of your costs and when you will brake even, and what will your net income be over your investment period. Most likely you won't be earning money with Bitcoin mining, and that's okay - mining has become a very specialised process. If you want to invest money into new ASICs, you might be able to turn a tidy profit. TLDR: Use this to check everything. ASICs may earn you money, GPUs won't anymore.
Back to the Future: 2014 Bitcoin increase, market Crash, and GPUs flood the market.
Image a world, where Bitcoin hits a new ATH of 1,000 USD! A new coin emerged, Litecoin. Using a new Algorithm called SCRYPT which makes GPU mining profitable and a thing again! The story starts in January 2014. AMD Just released it's newest GPU, the R9 290X in late Oct. this thing a monster of a GPU, extremely powerful! A GPU mining crazy has just hit the internet and waves of Tech people are making mining farms to mine Crypto. AMD GPU's are priced at premiums with 290's/290x's OOS or for sale upwards of $700, $200 over MSRP. Everyone is gulping up used AMD GPUs. Ebay is awash with GPUs selling over MRSP even used ones! I was there, I started out mining Litecoin to Litecoinpool.org, I had 3 Rigs I slapped together in crate boxes. Mixature of 7970/7950/7850's and a single a 4 GPU R9 290x rig (over 1400w!!!) using AMD AM3+ Motherboards and CPU's running Windows 8. I even near the end had a 750ti Rig, the new Maxwell, efficiently mining SRCYPT. I'm glad i lived in WA at the time The electric bill wasn't bad at all maybe 200-300 a month. I lived in Ellensburg getting that sweet Wind farm Electric rate. I Remember this time as I struggling to learn mining, overclockings for mining, and rig stability. In the short period I did this February 2014 to May of 2014 I made 48 Litecoins. This was a fun period for me because I loved messing with the hardware and GPUs even made decent profits from selling used hardware because it became such a premium then. In the end I quit mining and sold all my hard around May/June. Then moved back to CA to live with my mom to help support her after she lost her job and couldn't find work. I sold off my entire small operation. In the end the Market crashed, MT GOX was hacked millions of Bitcoin lost, and SCRYPT ASICs were released. I stopped paying much attention to the crypto-sphere and just HODLed the small Bitcoin that I had traded from the Litecoin I earned. Bitcoin dropped down to $200 by the end of that year. All in all I just want everyone to take in the fact that this exact, I repeat EXACT, thing has happened before in the long forgotten past of 2014. Yet everyone is making it out like its some crazy big deal? every crypto is still at high comparing to previous years, GPUs have declined in price because mining has died down, and ASICs are coming out for almost every Algo. To those of you still mining, keep on my brother! If I had kept mining, or kept on eye on the crypto sphere rather than walking away like most are right now, I could mined Etherum back in the early days of 2015 and now could of been extremely well off. Now, that im in it again and this time with more foresight and readiness. I'm here to stay through this rough times. hopefully to come out to see the otherside. I Only started(again) in june 2017 so I was late for this "gold rush" but mark my words the massive "Gold rush" for crypto has yet to come... Some Articles back then https://wccftech.com/gpu-miners-crash-2014-arrives-graphic-card-market-shrinking-fall-40/ https://www.ccn.com/amd-devastated-mining/ https://www.coindesk.com/litecoin-radeon-shortage/ TLDR: History repeats itself.
Super new to mining on NH, (just started a few days ago), and my single 280x has been chugging along as expected making about $2.30 a day. It has exclusively been mining with equihash. When I woke up this morning it was still running equihash but was sitting at only about 80% usage, thus only making around $1.60 a day. After a bit of tinkering I gave up and just disabled equihash and it is now mining CryptoNight at 100% making $2.35 again, anyone know why this might happen?
Hi, I am wanting to go into bit mining, but don’t know where to start exactly. I am about to buy a pc with 3 R9280 o/c ‘s on board. Total cost of setup is about $2500 approx.(£1600). This is a complete pc build with 1200 watt ps, 3 slot PCIE 16 m/b. I cannot find any info anywhere on whether these are efficient at mining. I have the following questions. Do I join a pool or mine solo? If a pool is better, then what is the best pool to join? What is the best coin to mine? (bit,lite or other) And last of all, What is a reasonable time frame to expect to cover the cost of buying this machine? Ie what is a rough idea to recover all costs before going into the black? I have read loads of info, but there are so many contradictions, and I am not sure what to trust. I thought my fellow redditors would be the best advisors
Reduce memory clock down to about 300. It's not needed for bitcoin mining. This will reduce heat. If you haven't already, go into settings and turn on force constant voltage. This dropped my power usage by 100W. Increase power limit to 20. This will allow your card to use more power if needed and makes it more stable. 4. Bitcoin Mining Pools. Mining is an extremely competitive game. Even if you buy the best possible miner out there, you’re still at a huge disadvantage compared to professional Bitcoin mining farms.That’s why mining pools came into existence.. The idea is simple – miners group together to form a “pool” so they can combine their mining power and compete more effectively. Mining Bitcoins in ESXi using an XFX 7970 Published on December 24th, 2013 This is a very specific article meant to target a very small subset of geeks out there. Bitcoin Miner James Starts Mining with 12 Radeon HD 7970 and Wishes to Change the World by CodingJames(author of the article), Chang Jia(founder of 8btc) and Lang Yu(CTO of 8btc)The first time I heard about Bitcoin was in late 2012 when I was studying computer science in University of Ottawa. 3. Best Bitcoin mining software CGminer. Pros: Supports GPU/FPGA/ASIC mining, Popular (frequently updated). Cons: Textual interface. Platforms: Windows, Mac, Linux Going strong for many years, CGminer is still one of the most popular GPU/FPGA/ASIC mining software available. CGminer is a command line application written in C. It’s also cross platform, meaning you can use it with Windows ...
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