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Using USB connected WiFi adaptors is perfectly fine.
I've mined for years using these and it's perfectly fine. I also use one of these adaptors on my normal PC for wireless internet in my apartment instead of running a cable across the entire place, and it's fine. It will not burn up or die just from being used. If you have this problem, then either you have a bad one, a cheap one, or something else is causing it to die (like heat, or static electricity, etc.)
However, I do agree that using an Ethernet cable is better! You will have a slower connection speed using wireless and get more stale shares etc.
I've mined for years using these and it's perfectly fine. I also use one of these adaptors on my normal PC for wireless internet in my apartment instead of running a cable across the entire place, and it's fine. It will not burn up or die just from being used. If you have this problem, then either you have a bad one, a cheap one, or something else is causing it to die (like heat, or static electricity, etc.)
However, I do agree that using an Ethernet cable is better! You will have a slower connection speed using wireless and get more stale shares etc.
Can you.... Yes
Should you.... NO!!
The GPU will work with the PCI power from 1 PSU and the riser power from another, but the issues arise if one of the PSU's fails or turns off... If one PSU dies or is on a different circuit and the breaker trips, your GPU will receive only partial power from either the PCI or riser, which will mean it won't work properly and can lead to issues like overheating, shorting out, etc.
The best advice would be to ALWAYS connect a GPU to the SAME PSU. With this setup, if one PSU goes down, the GPU's connected to that PSU go offline too, but it won't harm them.
Should you.... NO!!
The GPU will work with the PCI power from 1 PSU and the riser power from another, but the issues arise if one of the PSU's fails or turns off... If one PSU dies or is on a different circuit and the breaker trips, your GPU will receive only partial power from either the PCI or riser, which will mean it won't work properly and can lead to issues like overheating, shorting out, etc.
The best advice would be to ALWAYS connect a GPU to the SAME PSU. With this setup, if one PSU goes down, the GPU's connected to that PSU go offline too, but it won't harm them.
Re: All you home mining farms...how do you keep it cool?
I have a 290X that is between 70-80 C all year long. Been running well for 3 years now inside my desktop PC case. Obviously not the best situation and my open air cooled rigs are much better but I do what I can with what I have.
To cool your rigs better, you need to exhaust the hot air. It won't be pretty, but something like a box fan above each rig, blowing the hot air into a dryer vent hose that you can run to the outside somehow, like up into your kitchen and into the exhaust fan.
The key to cooler rigs is exhausting heat! The heat generated will almost always overwhelm an AC or fan cooling system trying to blow cool air in. You need to take the hot air OUT so that it doesn't heat up the room and just get recycled over and over gradually increasing the GPU temps.
To cool your rigs better, you need to exhaust the hot air. It won't be pretty, but something like a box fan above each rig, blowing the hot air into a dryer vent hose that you can run to the outside somehow, like up into your kitchen and into the exhaust fan.
The key to cooler rigs is exhausting heat! The heat generated will almost always overwhelm an AC or fan cooling system trying to blow cool air in. You need to take the hot air OUT so that it doesn't heat up the room and just get recycled over and over gradually increasing the GPU temps.
^^^ This is just not correct at all... ^^^
With positive pressure (more going in than coming out) the hot air in the grow tent will be forced out of any gaps that may exist (zips, doors etc.). You want NEGATIVE pressure inside the grow tent. That means that all the hot air is removed by the fans sucking air out and is not forced into the room.
To be honest, you don't really need intake fans... If you have exhaust fans, the negative pressure will suck air from the room into the grow tent, making the intake fans relatively unecessary
With positive pressure (more going in than coming out) the hot air in the grow tent will be forced out of any gaps that may exist (zips, doors etc.). You want NEGATIVE pressure inside the grow tent. That means that all the hot air is removed by the fans sucking air out and is not forced into the room.
To be honest, you don't really need intake fans... If you have exhaust fans, the negative pressure will suck air from the room into the grow tent, making the intake fans relatively unecessary
The set up doesn't look too bad to me, but make sure you try and balance the air flowing in / out. It's all well and good sucking X amount out, but if there's not enough flow going in, those fans will be limited in their capacity to move air / struggle. You have a negative 2120 CFM air flow in that grow tent, which will severely limit your air movement. Generally, you want it balanced (what goes in, come out) or slightly negative so that the heat is sucked out.
Also, once the air goes out of the grow tent, where does it go? This air needs to go OUTSIDE! You CANNOT keep that many miners and the room cool with just AC. You have to vent the hot air outside.
As others have said, HEAT EXTRACTION is far more important than cooling.
You could also use outside air for your intake too through a window or something? Even in Texas with 110°F / 43°C heat in the summer, that air will still cool the miners that usually run around 140-158°F / 60-70°C.
Maybe you could rig something up at a window? By some dryer vent / HVAC hoses and create something to allow air from the bottom of the window to be sucked in, and hot air expelled at the top. Remember to be careful of rain getting in etc.
Also, once the air goes out of the grow tent, where does it go? This air needs to go OUTSIDE! You CANNOT keep that many miners and the room cool with just AC. You have to vent the hot air outside.
As others have said, HEAT EXTRACTION is far more important than cooling.
You could also use outside air for your intake too through a window or something? Even in Texas with 110°F / 43°C heat in the summer, that air will still cool the miners that usually run around 140-158°F / 60-70°C.
Maybe you could rig something up at a window? By some dryer vent / HVAC hoses and create something to allow air from the bottom of the window to be sucked in, and hot air expelled at the top. Remember to be careful of rain getting in etc.
Build your own frame! You can make a 6 card rig frame for less than $20 all included...
http://highoncoins.com/litecoin-rig/how-to-make-diy-wooden-frame-for-litecoindogecoin-rig/
http://highoncoins.com/litecoin-rig/how-to-make-diy-wooden-frame-for-litecoindogecoin-rig/
72 degrees is fine for a GPU.
Is the card on the 'end' of your rig? Basically, the coolest air / cards are on the 'open' end with fans pulling in fresh air, but as you move along the rig, some hot air from the previous card gets pulled in. Generally, the cards will get hotter from open fan end to the other end, even with good spacing.
Other than that, try using compressed air on the radiator in case it's a bit dusty? Maybe the thermal paste isn't as effective on this card so could replace that if you know how, but honestly, it's not worth it in my opinion.
Also, the best way to deal with heat is to exhaust the hot air away from the cards and outside. This is more effective than blowing cool air onto the cards.
Is the card on the 'end' of your rig? Basically, the coolest air / cards are on the 'open' end with fans pulling in fresh air, but as you move along the rig, some hot air from the previous card gets pulled in. Generally, the cards will get hotter from open fan end to the other end, even with good spacing.
Other than that, try using compressed air on the radiator in case it's a bit dusty? Maybe the thermal paste isn't as effective on this card so could replace that if you know how, but honestly, it's not worth it in my opinion.
Also, the best way to deal with heat is to exhaust the hot air away from the cards and outside. This is more effective than blowing cool air onto the cards.
Might be relevant to a newcomer but had the same problem today:
Hadn't sync my wallet for about a month (I had 1.0.11). Tried lots of times to get it to fully sync (deleted entire blockchain [everything in the C:/Users/*User*/appData/Roaming/ZCash folder EXCEPT wallet.dat and peers.dat] and tried re-syncing from the very beginning) but nothing would stop me getting an error when the blockchain was trying to sync past 19th Dec 2017.
Finally uninstalled 1.0.11 and installed 1.0.12 and it is working fine now. Fully synced to the network.
Hadn't sync my wallet for about a month (I had 1.0.11). Tried lots of times to get it to fully sync (deleted entire blockchain [everything in the C:/Users/*User*/appData/Roaming/ZCash folder EXCEPT wallet.dat and peers.dat] and tried re-syncing from the very beginning) but nothing would stop me getting an error when the blockchain was trying to sync past 19th Dec 2017.
Finally uninstalled 1.0.11 and installed 1.0.12 and it is working fine now. Fully synced to the network.
Had the same problem. Hadn't sync my wallet for about a month (I had 1.0.11). Tried lots of times to get it to fully sync (deleted entire blockchain [everything in the appData/Roaming/ZCash folder EXCEPT wallet.dat and peers.dat] and tried re-syncing from the very beginning) but nothing would stop me getting an error when the blockchain was trying to sync past 19th Dec 2017.
Finally uninstalled 1.0.11 and installed 1.0.12 and it is working fine now. Fully synced to the network.
That might be the date the newer version was released but I am not sure. Anyway, synving as far as I could with the old version, uninstalling, and installing 1.0.12 worked perfectly, so hopefully this might help someone having a similar problem.
Finally uninstalled 1.0.11 and installed 1.0.12 and it is working fine now. Fully synced to the network.
That might be the date the newer version was released but I am not sure. Anyway, synving as far as I could with the old version, uninstalling, and installing 1.0.12 worked perfectly, so hopefully this might help someone having a similar problem.
LOL, you have never run a datacenter have you....the humidity in a datacenter is typically kept over %50 to cut down on the potential of static discharge. At %12 the potential for static discharge is huge. I don't want the air to be super humid....It definitely SHOULD be higher than %12.
My apologies for sounding rather rude in the first comment. I didn't mean it to come off that way.
But no, I've not run a data center, but I have run several mining rigs in very dry (single digit humidity) environments for several years and never had an issue before. I guess I figures that as all the equipment was connected and grounded at the wall it would't be an issue, but lesson learned. Good luck to you
Re: Risers: what is this trend to remove them and attach the GPU to the mobo?
but my bad experience with risers is that I use 4pin molex psu cable powering up 3 Risers wit GPU Rx480 8GB, and ended up burning the cable connected to PSU. 
Basically you have used a 3x splitter over a single molex cable?
I also read that sata to power the riser is generally a bad idea, this is correct?
Yes, SATA powered risers are the worst.
ALTHOUGH, I use SATA risers at the moment because that's what I could buy way back when I made my rigs. However, I use 1 riser for 1 cable to the PSU. Using 2 risers per PSU cable made the riser wires get very hot, and more than 2 will probably burn them out.
It's best to use 6-pin risers if you can.
Lots of people saying eBay only sides with the buyer. But they sided with me as the seller.
Sold a GPU. Buyer tried to return it after the 30 day grace period saying it didn't work. I was pleasant with communication and eBay / PayPal refused to take it any further.
However, this doesn't appear to be the norm so always be careful.
Things like taking pictures / video of item serial numbers and the packages etc will help you a lot. I've had a lot of people over the years try to return a broken electronic item that was actually their original which they swapped with their new purchase for me.
Good luck.
Sold a GPU. Buyer tried to return it after the 30 day grace period saying it didn't work. I was pleasant with communication and eBay / PayPal refused to take it any further.
However, this doesn't appear to be the norm so always be careful.
Things like taking pictures / video of item serial numbers and the packages etc will help you a lot. I've had a lot of people over the years try to return a broken electronic item that was actually their original which they swapped with their new purchase for me.
Good luck.
Don't worry.
Instead of 5,000 at the original 8,000 difficulty, you'll now get 2,500 shares at 16,000 difficulty. Both situations give you the same amount of work / profit. It helps manage pool traffic when more users start mining. Twice as many miners + double the share difficulty = same amount of traffic as before.
Instead of 5,000 at the original 8,000 difficulty, you'll now get 2,500 shares at 16,000 difficulty. Both situations give you the same amount of work / profit. It helps manage pool traffic when more users start mining. Twice as many miners + double the share difficulty = same amount of traffic as before.
I think you got it right on that last part... I *thought* everything was humming along just fine as the Claymore window showed shares coming in for each GPU. However - They seemed like they were fake shares. It wasn't showing any hashrates, just new shares coming in. I restarted the miner software, so should know soon - but pretty sure it was glitched out.
If you are using Claymore, you can configure what the -r function is (check the readme.txt file).
You can create a reboot.bat file that is executed if one of the cards glitches out. The example in the readme text file is to restart your entire system if a card hasn't submitted a share for a while, or something like that.
Obviously it's not the best solution to stability issues and checking the drivers, cables, power supply, temperatures, power stability, fans, etc. still needs to happen if things continue, but it's a good temp fix.
The -r parameter doesn't always work though because it only restarts the miner software if a card fails to perform at all. if things glitch and your cards are hashing at 0.5MH/s, it technically isn't stopped but your hash rate is down a long way so when you notice a drop on your pool progress, take a look at the rig (Personally I use TeamViewer on windows to remotely connect)
I use this. https://www.amazon.com/gp/product/B000FNFSPY/
Standard ethernet cable supplying the internet into one port, and 4 more coming out to the miners. Uses 1 ethernet input and splits it to multiple.
I only have the 5 port switch but its worked perfectly for 18 months.
Standard ethernet cable supplying the internet into one port, and 4 more coming out to the miners. Uses 1 ethernet input and splits it to multiple.
I only have the 5 port switch but its worked perfectly for 18 months.
There was a 'difficulty bomb' put in place by the Etherum developers for a number of reasons to do with the recent Byzantine / Metropolis changes. So that has made things a lot harder for miners to earn ETH.
*EDIT*: Link to a thread about the last difficulty bomb. https://bitcointalk.org/index.php?topic=2119950.0
Also, the 'number of shares' you submit is related to the difficulty. A lot of pools set a fixed difficulty which they can change at any time. Submitting 10 shares at level 1 difficulty is the same as submitting 1 share at level 10.
If neither of those things have caused the problem, then I am not sure. I don't personally mine Eth, but that does look like quite a drop off to me.
Are all your cards mining on your rig? Have you physically checked them? Sometimes the mining software is running but some cards have glitched out and either mine at 0 H/s or much lower speeds.
Hope some of that helps.
*EDIT*: Link to a thread about the last difficulty bomb. https://bitcointalk.org/index.php?topic=2119950.0
Also, the 'number of shares' you submit is related to the difficulty. A lot of pools set a fixed difficulty which they can change at any time. Submitting 10 shares at level 1 difficulty is the same as submitting 1 share at level 10.
If neither of those things have caused the problem, then I am not sure. I don't personally mine Eth, but that does look like quite a drop off to me.
Are all your cards mining on your rig? Have you physically checked them? Sometimes the mining software is running but some cards have glitched out and either mine at 0 H/s or much lower speeds.
Hope some of that helps.
It wasn't quite clear to me if you are trying to mine with all 3 cards at the same time but here is what I have to say.
You CANNOT mine with both AMD and NVIDIA cards at the same time, using the same miner. The 2 different card companies use different drivers that the mining software utilises.
You CAN however still mine all 3 cards at the same time, but you need to use different instances for different brands of GPU's. For example, Claymores latest Ethereum miner is designed for both AMD and Nvidia cards, but you need to load 1 instance for the AMD cards (and specify which PCI slots the AMD cards are using) and another instance for the NVIDIA cards (and specify which PCI slots they use).
Many people do this using the new motherboards that have 13 PCI slots because windows has a maximum of 8 cards that it can utilise at once. So they do an 8+5 or 7+6 configuration mix of AMD and NVIDIA.
As a side not, DEFINITELY use risers. It not only allows you more freedom of where the cards go, but spaces them out more for heat flow issues.
You CANNOT mine with both AMD and NVIDIA cards at the same time, using the same miner. The 2 different card companies use different drivers that the mining software utilises.
You CAN however still mine all 3 cards at the same time, but you need to use different instances for different brands of GPU's. For example, Claymores latest Ethereum miner is designed for both AMD and Nvidia cards, but you need to load 1 instance for the AMD cards (and specify which PCI slots the AMD cards are using) and another instance for the NVIDIA cards (and specify which PCI slots they use).
Many people do this using the new motherboards that have 13 PCI slots because windows has a maximum of 8 cards that it can utilise at once. So they do an 8+5 or 7+6 configuration mix of AMD and NVIDIA.
As a side not, DEFINITELY use risers. It not only allows you more freedom of where the cards go, but spaces them out more for heat flow issues.