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Absolutely! If you are looking to accumulate coins, the best time to mine is when profitability is low. The difficulty will be much lower and you can accumulate many more coins than when the profitability is high and everyone is mining it. Just look at those that were mining ETH back in Nov-Dec 2016 when it was ~$10 and a 6-card rig was able to mine several coins a week.
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$3 a day dosen't sound bad. If you would have been mining toward the end of 2014 when BTC crashed to $200 and ASIC's and multi-pools crushed most coins, you would have been lucky to make 30 cents a day after power. Another thing is your profitability is based on when you sell, not when you mine.
As long as people keep overpaying for cards, retailers will continue marking them up.
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Molex 4-pin connectors are rated up to 132 W each, but the problem is they almost never need to use anywhere near that power. PSU's typically use thinner gauge wire for molex and SATA cables compared to PCI-E cables, which are made to handle a high load. That's why you should never use more than two risers per SATA/Molex PSU cable, or you risk overloading the wire.
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SATA connectors are rated for 54 W max, which is why I don't like using single SATA connectors with risers. As long as you're not dual mining, which pulls a lot more power through the risers, it may be OK to use a single SATA connector to power one riser. Check the connector every so often to make sure it's not getting hot.
Molex 4-pin connectors are a much better option than SATA connectors, but never use more than two risers connected to the same PSU molex cable.
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6-pin PCI-E connectors are rated for 75 W max. Risers will typically use up to 60 W max, so you should be OK running two 6-pin risers from one PSU 8-pin PCI-E cable. I have run up to three 6-pin risers from the PSU cables that have a 8-pin + a 6-pin pigtail. I wouldn't go past three 6-pin risers per PSU cable. If you run out of PCI-E connectors on your PSU, you can use a SATA to 6-pin converter, but I would not run more than one 6-pin riser per SATA cable. I would also rather use a dual SATA to 6-pin adapter to spread the load over two connectors on the same PSU SATA cable. https://www.aliexpress.com/item/PCI-E-Adapter-Cable-Dual-15-Pin-SATA-Power-To-6-Pin-PCI-E-PCI-Express/32840243382.html? |
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The GPU index in Claymore's miners match the index in GPU-Z and most overclocking software. The easiest way I use to find which card matches each index is to use the cards setting software to turn on the GPU lights on/off on each GPU or use Afterburner to turn the fans up to 100% and then down to 25% on each GPU and make note of the index location.
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Different mining algorithms need different settings. By tuning the clocks to the algorithm you are mining you can maximize the hash rate and power efficiency. Lux is a core clock dependent algorithm like Lyra2RE and Equihash, so the hash rate is affected more by the core clock than the memory clock. Other Algorithms like Ethash and Cryptonight depend more on memory speed. Since each card is different in how much it can overclock, You need to try different settings to find what works best for your cards.
Hashing is done on the GPU, so the pool has no effect on your cards hash rate, only the shares you submit. You want a pool with a low latency. Choosing a pool closest to you can minimize the amount of stale and rejected shares you submit.
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You should unplug all the x1 riser connectors except for the one in the primary x16 slot before upgrading. I just use the Microsoft media creation tool to create a bootable flash drive with the latest build and always nuke the system drive to do a clean install. The media creation tool automatically creats a bootable flash drive with the latest Windows 10 build and updates. https://support.microsoft.com/en-us/help/15088/windows-create-installation-mediahttps://www.techspot.com/downloads/6734-windows-10-installation-tool.htmlMake sure to boot off of the USB flash drive UEFI partion from the boot menu for the Windows installation. After Windows installs I run DDU in safe mode to remove the existing driver and set Windows to not automatically install drivers. Then I shutdown, connect all the risers back in the PCI-E slots and install the latest driver. I also set a group policy to disable driver updates from Windows Updates. In the Windows 10 Pro Group Policy Editor you can keep Windows Update from updating the the drivers. gpedit ==> Computer Configuration ==> Administrative Templates ==> Windows Components ==> Windows Update and set 'Do not include drivers with Windows Update' to enabled. |
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The stale shares on Ethermine went up dramatically after the Byzantium fork back in October. I think the fixed share difficulty that Ethermine uses is too low for the 15 second block times since the Byzantium fork, which causes too many stale shares. I switched to Nanopool that uses a higher share difficulty and my estimated hashrate on Nanopool is much closer to my reported hash rate.
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I run 13 RX 480/580 in Windows v1709 with the AMD Adrenaline drivers on the ASRock H110 Pro BTC+ motherboard with no problems. The older Windows AMD blockchain and earlier drivers have an 8 card limit.
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Nanopool uses a fixed 10000MH difficulty, which means it's 60% higher than what Ethemine uses.  |
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You get more shares with Ethermine because they use a lower share difficulty. Lower difficulty = more shares worth less each e.g. 100 shares at diff 4000MH are worth exactly the same percentage of a block as 40 shares at diff 10000MH. Using lower share difficulty for higher hash rates is inefficient because you are getting work and submitting shares more often, increasing the load on the pools stratum which can lead to stale shares.
Based on the fixed 4000MH difficulty Ethermine uses, your miner should be getting 60% more shares on Ethermine to be equal to the amount of shares at a fixed 10000MH diff for Nanopool.
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On Windows v1709 you should use the latest AMD Adrenaline drivers and toggle the compute mode in AMD settings from gaming mode. If you want to use the compute drivers, Afterburner will not work with the AMD 17.11.xx or 17.12.xx Adrenaline drivers and multiple cards. Either use the Claymore config file to apply the overclock and undervolt settings at runtime, or use OverdriveNtool to create overclocking profiles for your cards as explained on www.mining.help. If you want to use Afterburner with multiple cards you need to use the AMD blockchain drivers and you are limited to 8 AMD cards. You still need to use the pixel patcher with RX 470/480 and 570 cards after installing the driver. |
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Looks like they removed it. Maybe coming out with another update?
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Finally got the VER 008 C 6-pin risers from TISHRIC. No difference to very little diffrence in power consumption when dual mining compared to VER 006 C 6-pin risers. On one 7 card rig the 008 C risers, which are all connected to the same PSU that feeds the motherboard , it had ~10-15 W lower draw at the wall. On my 13 card RX 580 rig there was almost no difference in the power consumption while dual mining on the main PSU connected to the risers and motherboard. So it appears the '5 W lower power consumption' is not true, at best maybe 1-2 W less per riser. I do like the slimmer board on the VER 008 C risers compared to the 006 C, which gives more room to the card next to it and perhaps improves air flow some. The LED on the board makes it easy to know the riser has power. The PCI-E x16 slot on the riser attaches very securely to the GPU and retainer clip on the riser works. I've had problems on other risers with not being able to secure the clip. The foam backing on the bottom was glued on well compared to other I've bought. Overall very good risers, I just doubt they use much less power than the 006C 6-pin risers. https://www.aliexpress.com/item/10pcs-TISHRIC-VER008C-Molex-6-Pin-PCIE-PCI-E-PCI-Express-Riser-Card-1X-to-16X/32828824043.htm |
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According to the discussions Gamers Nexus had with several GPU vendors, GPU's are being restocked on a weekly basis. You'll have better odds of getting cards if you go to your local retail electronics store and ask them when their next shipment comes in, then go to the store on that day. https://youtu.be/neNHVosINro?t=691 |
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Dual mining for 8+ months on USB risers and zero issues as well. For mining, risers are advancement from having to cram multiple GPU's on to a motherboard. These boards are a step backwards IMO, unless you plan to cram them in to a server rack.
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