At tomorrow's ETH Dev meeting they should set the approximate date for the second part of the Metorpolis fork, Constantinople which should happen some time before the end of year. Based on the previous meetings, it seems very unlikely a switch to a hybid Casper release will be a part of the next fork or happen before 2019. https://bitcointalk.org/index.php?topic=4495184.msg40445794#msg40445794 |
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Out of curiosity, what kind of hash rates are you getting with those settings?
Oh, I forgot to mention the problem why I decided to ask for help. My hashrate is about 180mh on each rig. But my effective hash on pool 160-170mh. That's my problem with that. And it's not overclocking, I see that the hour of cards in rig always gets more shares per hour than some other cards. I have already perfectly adjusted the frequency of all cards, but the loss of 7-10% hasrate does not go away. How many shares per hour do you give an average of one rig per 180Mh? I have on good rig 160 but mostly 140. If you use the ssl stratum on ethermine you will have much fewer stale shares and therefore a higher effective hash rate. -epool stratum+ssl://eu1.ethermine.org:5555 |
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The simple answer is even with free electricity, you're wasting your time. For the small amount of Crypto you would be able to mine, it's just not worth it and you will very likely damage the laptop in the long run, which would negate the small amount coins you were able to mine.
If getting ETH by mining s your goal, it would be MUCH more effective to sell the laptops and get a cheap rig. Goodwill or Craigslist has 100's of $50-$100 PC's that you can use for mining with a couple of cards. Way better and more effective than trying to mine with a laptop that isn't made to stay on 24/7, much less to mine with.
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IMO, low end cards are not worth the marginal savings for a mining rig under 24/7 operation. Compared to better quality cards, cheap cards skimp on cooling and generally come with lower quality binned components and memory. Since the passive cooling is not as good, you have to run the fans at a higher speed to keep the cards cool, which means more noise and the fans wear out faster. Resale value is also better on higher end cards. What I also like about the Sapphire Pulse and Nitro+ cards is they come with their modular X-Fans. Removing the fan is as simple as removing a single screw, which makes maintenance and cleaning easy. Replacements are also available for $12.50 each shipped directly from Sapphire. https://bitcointalk.org/index.php?topic=2949541.msg30314669#msg30314669 |
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Both the Sapphire Pulse and Nitro+ are great mining cards. The difference is the Nitro+ has a better heatsink, runs cooler and a dual bios switch. I've had very good results with the Polaris Bios Editor 'one click timing patch' timings. PBE automatically adjusts the timings with the bundled performance straps according to the cards memory type. https://bitcointalk.org/index.php?topic=2806981.msg40226027#msg40226027The only change I made to the PBE bundled timings is on the RX 580 Nitro+ cards with Samsung memory, I changed the bundled UberMix v3.1 Samsung timing with this one that is much more stable. 777000000000000022CC1C00106A5D4DD0571016B90D060C0060070014051420FA8900A0030000001011333DC0303A17 I easily get 31 MH/s on Samsung cards with a 1150 MHz core clock and 2150 MHz memory overclock. On Hynix cards I get 32 MH/s with a 1150 MHz core 2250 MHz memory overclock. |
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The latest from the last developers meeting is the hybrid Casper model the dev's originally planned to implement in the second part of the Metropolis release with the Constantinople fork won't be ready in time due to a shift in the roadmap from implementing Casper as a contract on the main chain to a seperate beacon side chain instead. They called for the Constantinople fork to happen some time before the end of this year, without Casper. https://notes.ethereum.org/SCIg8AH5SA-O4C1G1LYZHQhttps://youtu.be/8-AZys80RrU?t=3460No word if the Constantinople fork will implement a further reduction in the POW reward at that time, but that seems unlikely given the last POW reward reduction from 5 to 3 ETH was to offset inflation from reducing the block times from 40 seconds to 15 seconds. Vitalick also discussed the amount of stake to participate in POS with the new Casper roadmap will be 32 ETH instead of 1000 ETH. https://www.youtube.com/watch?v=8-AZys80RrU&feature=youtu.be&t=1769 |
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ASIC's are about an arms race where only the newest and most powerful remain relevant. In my view you should ever buy a mini anything ASIC if you expect it to be profitable. More like buy the MAXI  |
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In most cases I would keep it to two risers per cable max. Each riser can pull over 50W depending on the card and algorithm, such as with dual mining. A 6-pin PCI-E connector is only rated to deliver 75W max and a RX 580 dual mining can easily pull over 50 W from the riser. Some PSU's like EVGA, have cables with a 8-pin and a 6-pin pigtail, or with dual 8-pin's. In that case it should be OK to use a 8-pin to dual 6+2 splitter on the 8-pin connector which is rated to deliver 150 W and then the 6-pin to power 3 risers off one PSU cable.
Some server type PSU's that come only with 6-pin connectors have thicker gauge cable coming from the PSU that then braches off in to 18 gauge to each individial 6-pin connector. In that case you might be able to use a splitter on the 6-pin to power two risers from each 6-pin on the PSU if needed.
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Wrong forum. This belongs in Altcoin Discussion.
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I would recommend against powering more than two risers with SATA connectors on 18 AWG cable. The problem with powering more than two risers per SATA strand is 18 AWG wire is only rated for 10 A max for single core wire, which is 120 W at 12 V and much less for multi-stand wire. SATA connectors also have a single 12V wire, which means the entire load is on a single cable, instead of spread out over 2 or 3 cables as is the case with 6 or 8 pin PCI-E cables. Using more than two risers per SATA cable strand WILL exceed the rating of 18 AWG multi-stand wire, causing the wire to heat up and is dangerous. https://www.engineeringtoolbox.com/wire-gauges-d_419.html |
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The problem is the Windows v1803 update, not the drivers. The latest drivers are compatible with the Windows 10 v1803, more than likely it's the Claymore miner that's not been updated to be compatible with v1803. The 18.6.1 drivers are working with Claymore v11.8 in Windows v1709. You may be able to roll back the v1803 update, or follow these steps to do a clean install of Windows v1709. Then disable Windows Feature updates in gpedit. https://bitcointalk.org/index.php?topic=4459808.msg40031896#msg40031896 |
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