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      "body": "So you've done your homework, bashed everything into whattomine.com and determined the best type of cards for your vision. You've even got time to read some stuff online again - since you're here. However, what that website and auto-profit mining pools / miners all do not factor in how income, hashrates, power consumption and depreciation work together to actually determining what's most profitable.\n\nWhat I have done here is worked through it for one card, as an example, to illustrate this and I'll show you how I got there, so you can apply this from time to time for your own mining. Better efficiency (as in profit, not hash/watt) will always help you through. \n\n### Choosing the card\n\nIn this instance, I've picked the card that given all factors (cost, resell value, hashrate, power consumption) performs best on the currently most profitable to mine coin, Monacoin. It's the 1080Ti. The lessons are for any card - just in case the 'Ti' makes for a frightening example. The 1080Ti is just absolute best in mining coins that use the Lyra2REv2 algorithm.\n\n#### The assumptions\n- **Cost**: $745 USD\n- **Resale value** after 15 months of mining: $375\n- **Electricity**: $0.12 / kWh\n\nThese assumption are important as changing any of these will have an influence. Taking the above, the total depreciation of the card is 745-375 = $370. But what about the PC itself? I assume you can run 8 cards in a rig, so for this one card I'm going to add the depreciation for the rest of the components at $35 for the same 15 month period (aka 8 card = 8x35 = $280 depreciation for the whole PC).\n\n![profit_mining1.jpg](https://steemitimages.com/DQmSSBTUFVD1JAtdT6ejFtFGShcZoSQNV1V5Nk5jEXat6CF/profit_mining1.jpg)\n\n### Looking at the hashrate vs power consumption\n\nAs you know we can tweak power consumption. In fact, a 1080Ti has a curve where voltage is set vs frequency. Algorithms like Lyra2REv2 heavily depend on the core frequency. As you can see there's a diminishing rate on return by increasing the voltage. Not only that, power consumption increases not by voltage but by voltage square. So what we can expect from the below graph is that we will have rapidly declining results for increased power consumption. \n\n![profit_mining2.jpg](https://steemitimages.com/DQmWJpYdZWcBmUze9Smrtkyu31S6qdSiiFbZ6FWzQ3VJ2th/profit_mining2.jpg)\n\n### Actual results from the 1080Ti\n\nBelow are my results. The first one is a simple 105% power draw +38 Core and +504 Mem setting that would be a good gaming setup. The other 3 settings are where I flattened the power curve on a fixed voltage & frequency, so we get stable results in power & hashrate.\n\n![crypto_cards_calc.ods - OpenOffice Calc_2017-10-14_09_06_25.png](https://steemitimages.com/DQmXa3TNBzD76Mwx7Fgz1SQRrCMeGGNoR7osyYkijZ1iPHD/crypto_cards_calc.ods%20-%20OpenOffice%20Calc_2017-10-14_09_06_25.png)\n\nFrom this table we can determine that the efficiency - as predicted- is best at the lowest setting.  A lot more power is need to increase the hashrate each time. This is why those who tweak their mining rigs, often choose low power settings. But as you will see in the next sections, this is not what determines profitability.\n\n### Tweaking for profit instead\nWhat I've done below is enter my hashrate & power consumption + electricity cost into whattomine.com - but you can do you own calcs equally. I've then added in the depreciation I spoke about earlier and put that in as a daily depreciation cost. Here's what that looks like:\n\n![crypto_cards_calc.ods - OpenOffice Calc_2017-10-14_09_06_31.png](https://steemitimages.com/DQmNpcYXNmvGiDjwupmGiCbLej6yCRohZS85sn9j3pripwR/crypto_cards_calc.ods%20-%20OpenOffice%20Calc_2017-10-14_09_06_31.png)\n\nAs you can see from that, profitability peaks at around 0.85V. This is because coming from 0.8V, if we add 7 cents in electricity costs a day, we gain 14 cents in clean profit / 21 cents total. Looking at the 0.9V data, it looks like we may find that that the optimal value is actually 0.875V. \n\nAt 0.9V we still get more profit, but the return on our investment as a percentage (the efficiency of capital put it in) is starting to decline.\n\n### In Conclusion\n\nThe profits calculated through various website calculators, mining pools with auto-coin selectors.. all of them never take depreciation and the tweaking levels of a card into account and are likely to not give you the optimal results. As shown,  the best results are dependent on your card, it's purchase price, it's resell value, the period over which you'll be mining, the electricity costs all considered - and may change over time as a result. It's also not that hard to figure out: once you can establish the daily depreciation, and measured the hash-rate for a couple of power levels, you can add in the other factors from other calculators. \n\nIn the end, being aware of this and checking the profitability calculations this from time to time can help you get the best returns. You will even see that some cards have negative returns for certain algorithms - but that's something for a next article. In the mean time.. \n\nHappy Mining!\nEd.\n\n*Disclaimer: not affiliated with any website or vendor - these are just things I've personally chosen*",
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      "author": "cryptoed",
      "body": "@@ -4828,18 +4828,20 @@\n ware of \n-i\n t\n+his\n  and che\n@@ -4916,20 +4916,16 @@\n  you get\n-ting\n  the bes\n",
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      "author": "cryptoed",
      "body": "@@ -4684,16 +4684,73 @@\n ciation,\n+ and measured the hash-rate for a couple of power levels,\n  you can\n",
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      "body": "@@ -2846,23 +2846,45 @@\n g)%0A%0A\n-As you can see,\n+From this table we can determine that\n  the\n@@ -2909,25 +2909,16 @@\n redicted\n- is best \n - is bes\n@@ -3213,28 +3213,29 @@\n t I've done \n-here\n+below\n  is enter my\n@@ -3705,19 +3705,25 @@\n can see \n-now\n+from that\n , profit\n",
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      "body": "So you've done your homework, bashed everything into whattomine.com and determined the best type of cards for your vision. You've even got time to read some stuff online again - since you're here. However, what that website and auto-profit mining pools / miners all do not factor in how income, hashrates, power consumption and depreciation work together to actually determining what's most profitable.\n\nWhat I have done here is worked through it for one card, as an example, to illustrate this and I'll show you how I got there, so you can apply this from time to time for your own mining. Better efficiency (as in profit, not hash/watt) will always help you through. \n\n### Choosing the card\n\nIn this instance, I've picked the card that given all factors (cost, resell value, hashrate, power consumption) performs best on the currently most profitable to mine coin, Monacoin. It's the 1080Ti. The lessons are for any card - just in case the 'Ti' makes for a frightening example. The 1080Ti is just absolute best in mining coins that use the Lyra2REv2 algorithm.\n\n#### The assumptions\n- **Cost**: $745 USD\n- **Resale value** after 15 months of mining: $375\n- **Electricity**: $0.12 / kWh\n\nThese assumption are important as changing any of these will have an influence. Taking the above, the total depreciation of the card is 745-375 = $370. But what about the PC itself? I assume you can run 8 cards in a rig, so for this one card I'm going to add the depreciation for the rest of the components at $35 for the same 15 month period (aka 8 card = 8x35 = $280 depreciation for the whole PC).\n\n![profit_mining1.jpg](https://steemitimages.com/DQmSSBTUFVD1JAtdT6ejFtFGShcZoSQNV1V5Nk5jEXat6CF/profit_mining1.jpg)\n\n### Looking at the hashrate vs power consumption\n\nAs you know we can tweak power consumption. In fact, a 1080Ti has a curve where voltage is set vs frequency. Algorithms like Lyra2REv2 heavily depend on the core frequency. As you can see there's a diminishing rate on return by increasing the voltage. Not only that, power consumption increases not by voltage but by voltage square. So what we can expect from the below graph is that we will have rapidly declining results for increased power consumption. \n\n![profit_mining2.jpg](https://steemitimages.com/DQmWJpYdZWcBmUze9Smrtkyu31S6qdSiiFbZ6FWzQ3VJ2th/profit_mining2.jpg)\n\n### Actual results from the 1080Ti\n\nBelow are my results. The first one is a simple 105% power draw +38 Core and +504 Mem setting that would be a good gaming setup. The other 3 settings are where I flattened the power curve on a fixed voltage & frequency, so we get stable results in power & hashrate.\n\n![crypto_cards_calc.ods - OpenOffice Calc_2017-10-14_09_56_07.png](https://steemitimages.com/DQmTbWij6FJDWPxzsu79XiFjXbke12Si26xK5RfGyWLPMyu/crypto_cards_calc.ods%20-%20OpenOffice%20Calc_2017-10-14_09_56_07.png)\n\nAs you can see, the efficiency - as predicted is best - is best at the lowest setting.  A lot more power is need to increase the hashrate each time. This is why those who tweak their mining rigs, often choose low power settings. But as you will see in the next sections, this is not what determines profitability.\n\n### Tweaking for profit instead\nWhat I've done here is enter my hashrate & power consumption + electricity cost into whattomine.com - but you can do you own calcs equally. I've then added in the depreciation I spoke about earlier and put that in as a daily depreciation cost. Here's what that looks like:\n\n![crypto_cards_calc.ods - OpenOffice Calc_2017-10-14_09_06_31.png](https://steemitimages.com/DQmNpcYXNmvGiDjwupmGiCbLej6yCRohZS85sn9j3pripwR/crypto_cards_calc.ods%20-%20OpenOffice%20Calc_2017-10-14_09_06_31.png)\n\nAs you can see now, profitability peaks at around 0.85V. This is because coming from 0.8V, if we add 7 cents in electricity costs a day, we gain 14 cents in clean profit / 21 cents total. Looking at the 0.9V data, it looks like we may find that that the optimal value is actually 0.875V. \n\nAt 0.9V we still get more profit, but the return on our investment as a percentage (the efficiency of capital put it in) is starting to decline.\n\n### In Conclusion\n\nThe profits calculated through various website calculators, mining pools with auto-coin selectors.. all of them never take depreciation and the tweaking levels of a card into account and are likely to not give you the optimal results. As shown,  the best results are dependent on your card, it's purchase price, it's resell value, the period over which you'll be mining, the electricity costs all considered - and may change over time as a result. It's also not that hard to figure out: once you can establish the daily depreciation, you can add in the other factors from other calculators. \n\nIn the end, being aware of it and checking the profitability calculations this from time to time can help you getting the best returns. You will even see that some cards have negative returns for certain algorithms - but that's something for a next article. In the mean time.. \n\nHappy Mining!\nEd.\n\n*Disclaimer: not affiliated with any website or vendor - these are just things I've personally chosen*",
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      "body": "Congratulations @cryptoed! You have completed some achievement on Steemit and have been rewarded with new badge(s) :\n\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/firstvoted.png)](http://steemitboard.com/@cryptoed) You got a First Vote\n\nClick on any badge to view your own Board of Honor on SteemitBoard.\nFor more information about SteemitBoard, click [here](https://steemit.com/@steemitboard)\n\nIf you no longer want to receive notifications, reply to this comment with the word `STOP`\n\n> By upvoting this notification, you can help all Steemit users. Learn how [here](https://steemit.com/steemitboard/@steemitboard/http-i-cubeupload-com-7ciqeo-png)!",
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      "body": "Stuff happens and let's say you end up with a couple of different cards in a single rig. Perhaps you couldn't pass up a couple of 2nd hand offers, you had to replace some cards.. anything. Is this trouble or opportunity? \n\nThe challenge then is to get each card to do what it's best at... and so if you are choosing cards for a new rig, or trying to optimise what you have - there might be something below that can help you make more fruitful decisions.\n\nI was faced with a multi-card short time ago and it turned out better than expected. My original plan was to just to mine ETH with NVidia 1060's. Except one card didn't work, was send back for replacement, and one 1060 was an MSI gaming X+ which is much slower than my other 1060's for ETH.\n\n**My 'frankenstein' rig composition:**\n- 5 x MSI Gaming 3Gb (samsung memory)\n- 1 x MSI Gaming 6Gb (micron memory)\n- 1 x MSI Gaming X+ 6Gb (very high latency memory - 20% slower than the above in ETH)\n- 1 x EVGA 1080 SC (generally known to have poor memory for ETH)\n\n![frankenmine.jpg](https://steemitimages.com/DQmfW88MAwLCJdraH7BwhukXeUD2H7vPhhH3cVF1enbGPu1/frankenmine.jpg)\n\n**Finding out what each card is best at**\n\nMy first plan of attack was to find out what each card is best at. Using whattomine.com, measuring power draw and a speadsheet, it turns out the 1080 is spectacular at mining Groestl. Even when taking in account power consumption and its purchase price (not much more than a 1070 now), it beats any other card. However no 'Groestl' based coin is worth anything meaningful as of today. So it was now clear to me that I also needed to get the price of the coin into it.\n\nIn the end, I put all factors together: purchase price, cost of the rest of the rig, power consumption, hash rate for a currency, the expected rewards and the value of the coin mined. Here's what that looks like for me being in NSW, Australia:\n\n**The number of months to break even assuming a re-sell at 50% of the purchase value.**\n![mining_rigs_calc 2.ods - OpenOffice Calc_2017-10-06_01_54_42.png](https://steemitimages.com/DQmRopq1Z53kn6xdqo74ynuH9J3SWgXax2P4MxZ61D96EFe/mining_rigs_calc%202.ods%20-%20OpenOffice%20Calc_2017-10-06_01_54_42.png)\n*While the actual earn back period fluctuates a lot with currency prices and hardware prices, these earn-back periods hold up pretty well relative to another card.*\n\n**The right job for the 1060's and the 1080**\nSo using this data, the normal Gaming X's are going to work on ETH. Mine get about a 23.5 - 24.8 hashrate at 0.8V (67-73W per card). \nThe 1080 is clearly destined to mine ZCash right now (485Sols at 0.8V / 120W).\n\n**The best job for the 1060 Gaming X+ / any 1060 card with poor memory OC**\nAnd finally the 1060 Gaming X+.. it really should have gotten it's own 'graphics cards' column;  it's memory latency causes it to be a lot slower for ETH. \n\n**What 1060 performance depends on** \nWhy slower? Well ETH on the 1060 is completely held back by the memory speed. Having 9 computes in the 3Gb version is exactly as quick as the 6Gb version with 10 compute cores. However when optimising 1060's for ZCASH... memory speed has nearly no influence and processing power is everything. To sum it up: for Equihash, you can use the worst memory overclockers, while for ZCASH you want those with the best core clocks.\n\nTypical ETH 1060 tweaks:\n* memory: +900 for samsung, or +720 for micron memory\n* core: 1400Mhz @ 0.8V\n\nTypical ZCASH 1060 tweaks:\n* memory: +0\n* core: 1725Mhz @ 0.8V \n\n**In conclusion**\n\nA mining rig with several cards is a bit more complex than having one type. When mixing AMD and NVidia you could run into issues as well. You'll certainly will need to optimise each type of card for the currency that it will be best for. If you are mining under Windows, I'd recommend to keep a couple of profiles in afterburner ready for each miner, so you can easily switch as the values of coins change.\n\nOn the plus side, having a couple of cards, can make you a bit more versatile in taking advantage of changing market conditions, even if sometimes not all cards are dedicated to the most profitable currrency. You will also gain a lot of insight in cards and what to buy next. \n\nNote also that in the end, everything depends on prices in your particular country, area or electricity plan even. Cheaper power will make the RX570 better at ETH than a 1060 at some point, while a 1060 or a 1080 is potentially a more versatile card doing more coins pretty well. \n\nIn any case: Happy mining and until the next time.\nCrypto Ed",
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