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So I finally added the last 2 GPUs to my mining rig. Before, I had 4 cards hooked up and everything hashed as expected, but with some "mildly" frequent disconnects from pools (especially suprnova), according to the software.
Last night I added the last 2 390x's, and everything booted and all cards were recognized just fine. However, once I start the miner, TeamViewer would almost immediately disconnect and I would have a very hard time reconnecting. The miner reported eth hashrate as expected (~160 mh), but my pool (coinotron) reports only 2-5 mh, which is a fraction of what it should be. I tried running Genoi's latest release, but the CPU usage jumped to 99% once the mining started, and after a couple minutes I saw TeamViewer disconnecting as well as display driver crashes, so quickly scrapped that strategy.
I'm not really sure what might be the issue, but it seems maybe the wireless adapter I have installed isn't doing what it needs to. Any advice as to what might be the issue? For completeness sake:
4gb RAM
Celeron CPU
2x 1k watt PSU
4x 390x
2x 280x
Windows 10
Thanks!
I had a similar issue previously, until I installed a "headless HDMI or DVI adapter" - after that my TeamViewer or VNC connects as per normal as if the remote irg is attached to a PC monitor. Well, whenever I first start the rig up, I have a monitor plugged into the first GPU, and I still see the same behavior. TeamViewer only disconnects or somehow seems less stable when I fire up a miner.... Ok, so I'm quite sure my first problem is the wireless adapter I'm using. Plugged in using an ethernet cable, I get steady connection and have no problems also connecting TeamViewer. Unfortunately, the spot I want my rig is nowhere near where my modem/router is, so I need to find a dependable wireless solution. Any suggestions?2nd problem: Once I wired in to my network, I noticed that after a few minutes of running all 6 cards, a couple of them would reach 94+ temps. At which point, display driver would fail, and the 3 GPUs I had plugged into my 2nd PSU would turn off (sometimes the others would stay, sometimes the entire rig would just shut down). So, I guess I need to buy a Kill-A-Watt or similar to monitor voltages from each PSU. Given I have 2x 280x and 4x 390x, does anyone have a recommendation for how to configure them? I mean, how many cards into the primary PSU, and how many in secondary PSU (I'm using Add2PSU to connect the 2x 1000 watt PSUs). Thanks for any feedback! I will us 2X280x+1X390 in the main, and 3X390 in the secondary. By doing that, you might have 800W in each PSU. |
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Most people here are dreaming to own 21 BTC (because of the magic 21 BTC number which makes you part of the 1 million club), but not only this, most people are having big problems making 1 BTC only.
In 2030 1 million dollars will not buy you 100 BTC at all.
The bitcoin price will be $100,000 or higher each. So $1milllion will only buy you 10 bitcoin at most. |
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That is very good summary of the state of the art. I use the ethpool.org as it pays out the block reward plus transaction fee.
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Which motherboard do you use? For some mothboards, if you use the x1 riser, you need to short the A1B17 or B1A17 card presence pin.
MSI P67a-GD65 where is that pin located? Shorting out the pins just tells the motherboard to provide 75W to the slot, usually x1 is limited to 25W. It may result in more power going through the MB than it can handle. I don't recommend it. Make sure you use powered risers. With powered risers the power from the slot is not used. My rule of thumb is the MB is designed to supply enough power to as many GPUs as there are x16 slots. Any more GPUs than that and extra power is needed. If you use powered risers, there should be no problem. |
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Much of the original point I tried to make has evaporated in light of ETH >.015 BTC (.017? .019!?! .02!!!), electric costs should be a non-consideration for most. That said: But that extract fan power consumption is due to the mining as well. So we have to take that in to account.
100% GPU TDP on 970 = 145W Do the math, break it down, here's the numbers: Overclocked, maintaining <70C core temp (high fan profile): gpu1 (incl. fans on card): 108W (75%TDP) gpu2 (incl. fans on card): 115W (80%TDP) 4 case and 2 cpu fans, hdd, mobo/cpu: 50W (case fans ramped to 60%) Total so far: 273WPSU loss: 55W (80% efficiency; 0.2 * 273 = 55W) 273+55 = 328W, or basically what I've monitored on the UPS 42MH/s, 7.8W/MH (total system), 5.3W/MH (gpus only) Stock, maintaining 75C core temps, stock fan profile, both @65%TDP: gpu1: 90Wgpu2: 90Wcase fans+hdd+mobo+cpu: 30W (silent pc mode) Total so far: 210WPSU loss: 42WTotal system: 264W36MH/s, 7.0W/MH (total system), 5.2W/MH (gpus only) Something I'm going to try is disabling Windows Aero. Even though it's a headless system and it's not doing anything, some have mentioned it stealing GPU power all the time regardless of use, therefore decreasing hash. I've seen weirder things, especially on Winblows. God, I've got to roll Mint or something.I've seen the "my 280x will do xxMH on yyyW with zzzV undervolt" before, I still have no clear idea because so many things play a factor in pushing the limit. I've seen people today who own multiple rigs, running mixes of 7950 and 280x, undervolted/clocked/tweaked/whatever, drawing over 3KW to get 350MH/s (9W/MH!), and they're happy with that. To each their own, ETH's at .02 BTC, electric ain't much of a matter no mo. I think I'm done with this particular thread.     I have 4x7990 undervoltaged to 0.95 V, 850/1250MHz. It does 156MH/s with 1320W from the wall, So that is 8.46W/MH/s. you can do better with six 970 = 1020w for 132 megahash, this is 7.7w/mh, and this is also a more cheaper rig 4x7990 = £1100. 6x970 = £1500. So it is more expensive to use the 970. Maybe the 970 will hold value better. you're probably comparing used card versus new, there is no way that you can buy a 7990 for that cheap if it is new The £1100 for 4 will be the second hand price. The new ones cost £600 each when they first came out. |
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i have no strategy,for bitcoin trading i dont use strategy,just like ordinary traders,buy when the price low,and sell when the price high,simple. but i dont think its can applicable to altcoin trading.
it's a strategy, if you not have strategy you will buy bitcoin when you want, and you will sell when you want, you can sell your bitcoin at low price and buy back at highest price The best trading strategy is just to buy and hold the bitcoin. We are not good at trading at all. Most of us will lose money to the exchanges. |
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Ethereum forum, they made a calculation and said most GPUs won't be able to mine Ethereum due to DAG limit. Only 4GB and higher will work.
Do you have a source for this calculation? Someone is making a mistake here. The DAG will be 2.24gb in exactly one year. Not over 3gb in 45 days. Please also see https://github.com/ethereum/wiki/wiki/Ethash-Design-RationaleQUOTE FROM SITE:The ~0.73x per year growth level was chosen to roughly be balanced with Moore's law increases at least initially (exponential growth has a risk of overshooting Moore's law, leading to a situation where mining requires very large amounts of memory and ordinary GPUs are no longer usable for mining). Furthermore, mining phase will finish in serenity, which is a year away. That makes the window to make a profit very narrow. Should start assembling my mining rig right now. You can also ROI with old 280x cards. They are cheap and powerful. For the new Fury cards, you will not ROI. |
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Buy Low Sell High  This is all we wish. But unfortunately, we do not know the timing for buying or selling. Otherwise all of us will be rich. |
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this is another thing that should be added, a small reward to incentivate running a node they can already do that with the fee, 10ks to everyone that is running a node, per day, at least they have a free transaction Is there a block reward scheme for full nodes? I am interested in joining one. I have a full node. no there are not reward of any kind, sadly, otherwise i would run one This scenario will maybe change when the mine of bitcoins ends,on that time someome must support the network to keep bitcoin safe,soo the owners of nodes on that time should take some % to keep alive otherwise we will see bitcoin going down very fast. The mining of bitcoin will never end as the miners can get fees for supporting the network. That is the transaction fee. |
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this is another thing that should be added, a small reward to incentivate running a node they can already do that with the fee, 10ks to everyone that is running a node, per day, at least they have a free transaction Is there a block reward scheme for full nodes? I am interested in joining one. I have a full node. |
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the idea is that mining will become profitable if the bitcoin price goes up. Unfortunately I dont think the price matches the difficulty but I think that will change very soon.  are you saying that when the halving occurs BTC will rise? If the difficult keeps 8% on rising every 13 days and the bitcoin price does not rise, it will be not profitable for most miners in the next reward halving. |
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In the past there were many Cloud Mining services available. Some of them are legit, but some of them are Ponzi scheme or other form of scam.
Unfortunately Cloud Mining services can be easily exploited as user can't have enough control over the service. Be very cautious about investing in any cloud mining now.
Cloud minng is difficult for customers now. The difficult will rise a lot with the new Bitmain S7 and Avolon A6. |
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