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I have no knowledge about this what so ever but in theory couldn't some helpful person on this forum buy up cards in bulk from sapphire directly and sell them to us? If they charged 10% more then what they paid per each card would it be cheaper then newegg prices? If that is true they would make profits and we could purchase cheap cards no?
Feel free to explain why I am wrong or why this this isn't feasible.
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Thanks, I just didn't know if anyone could mine without advanced graphics cards, like buying a new one. Thanks.
Yea any one can mine with a cpu. The gpu requires opencl support or it wont be able to mine. Onboard graphics tend to be very crappy so I assume most would not have this support. If the laptop had a dedicated graphics card then maybe depending on what it is. |
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Would it be worth it to mine with a cheap laptop? How exactly does it all work? How much electricity would it take up? And is it worth it?
I assume when you say a cheap laptop you mean a laptop with onboard graphics. If thats the case you will probably only be able to cpu mine. If thats the case cpu mining costs more electricity then will give you profit. I know you didn't ask for the information coming up but I thought I would be very thorough since you said you were a newb and you may ask these questions in the near future anyway. If you really want to make a profit off mining I recommend buying a graphics card and throwing it into a desktop you already own or building a desktop from scratch. When it comes it comes to picking a card you want to pick a 5770, 5830, 5850, 5870, or a 6770. Price is very important though. Here is my recommendations for price points for each card. For the 5770 and 6770 (exactly the same card with different name) the absolute most you want to pay is 110 and thats pushing it. I personally would be a buyer at around 90. For the 5830 pay no more then 130. For the 5850 pay no more then 160-170 For the 5870 pay no more then 200. I'd also like to point out sapphire seems to be one of the top brands so if you can snag a sapphire you will most likely get the most megahash out of your card. |
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Does your pool work off donations or require a fee?
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325.2 MHash/sec
Sapphire 5830 Extreme
1010/370/1.175v
70c
GUIMiner v2011-07-01 / phoenix / diapolo modded phatk 7-17
VECTORS BFI_INT WORKSIZE=256 FASTLOOP=false AGGRESSION=14
You shouldn't have to change voltages in order to get that speed. I have 1030/350 for the same card as yours with no overvolt and I'm getting 333.88. If I go with your speed no overvolt I get 327.36. Try these settings: phoenix 1.5 phatk from Phateus(7-29) Stock voltage 1.163v, maximum stable core is 985 at same temperature. I needed the bump to get it stable. That's weird maybe I just got a good batch? |
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Perhaps you should try and keep up with the statements I made in my short and concise post. I said next target is quite easy to do without any modelling of any kind. I said that the trick is making a model that can forecast farther down the road, and used your forecast as an example of how difficult it can be (Your median was about 70% off actual, and even your lower bound was wrong with a huge error bar).
I applaud your work on creating a method of prediction, but until you stop patting yourself on the back for being right with the easy stuff, I suspect you will have trouble with the hard stuff. An 8% increase still seems much more likely than a > 15% increase. So we'll see, you are predicting a roughly 17% increase for your next median I believe? Let us see who does better, just for fun, no wagers necessary.
Your mathematical model says 17.5% for median, I will say 8.5% based solely on my own observation and "gut feeling". Let us see who does better for the next retarget. I know you argue against hard target exactitude, but that is not the point of this game, merely to show the ease of next retarget checking. And I haven't even really been paying that much attention lately tbqh.
EDIT: 1834633 to be more clear.
It is much harder to go out two re-targets or more. But it is something I am still working on despite any back patting. I get it. For block 139104 you are calling 1834633, I am calling 1986157. We will see who is closer. Care to go out to block 141120? It's getting close to the next change. Looks like any one who guessed 8-10% was extremely close and your prediction was way off  |
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325.2 MHash/sec
Sapphire 5830 Extreme
1010/370/1.175v
70c
GUIMiner v2011-07-01 / phoenix / diapolo modded phatk 7-17
VECTORS BFI_INT WORKSIZE=256 FASTLOOP=false AGGRESSION=14
You shouldn't have to change voltages in order to get that speed. I have 1030/350 for the same card as yours with no overvolt and I'm getting 333.88. If I go with your speed no overvolt I get 327.36. Try these settings: phoenix 1.5 phatk from Phateus(7-29) |
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WTF, I was getting 495 MH/s @ 985/300 for about an hour. I'm not sure what it is I did, but was mining Namecoins in GUIminer, then switched back to mining Bitcoins with Phoenix. I've done it 2 or 3 times now and it will mine around 495 MH/s for about an hour before it locks up. I wish I could repro this stably.
You can get the $190 5870's from newegg up to 495? 0.o Even if its only for a hour at that speed that's a huge bargain. Wish I had the money when they had that sale. |
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The max on windows should be 8 try updating your catalyst drivers.
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I dunno I'll just have to test it when It comes in. I'm building a skeleton of a case so it's not like the heat will be trapped inside a closed computer case.
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I highly doubt that this card is a 5770 by looking at the pic, 5770 is not a weak card with super low heat output, and this little cooler will melt on a 5770 on full load. It's probably a 5570 and someone did a typo, and didn't correct it yet. The model number they list: Model# 5570PE31GSB is a 5570 |
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You probably can't get comfortable temps with this tiny cooler, if you want silence you need a big heatpipe based cooler. Go find an coolermaster hyper 212+, that should work passively. It should sell for 20$~30$
This is a Sempron not an i7 its not going to be generating nearly as much heat as those. At worst case the 15 dollar heatsink(including the fan) will work no problem. One of the reviews even said he ran prime95 and the highest temp his cpu got was 35c and he is running the 11 dollar heat sink. |
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Yes it is possible, but you will need pci extenders and then the max is 8 using a psu of 1200 watt or better.
The other problem if you do not use pci extenders, the max is 6 GPU due to physical limitation on the 890fxa-gd70, and you will need to run the fans at full speed since having the video cards with almost no free space in between them causes the temperature to go up a lot, unless you water cool them, without the pci extenders the last pci slot can not be used since the card does not fit properly on the motherboard since it was not meant for a double width card.
The other problem is you will need to use amd sdk 2.4 and catalyst 11.6 which has a bug that with the mouse that causes everything to lock up once a while if you use the computer while mining.
With catalyst 11.7 it did not work for me. the X and ati utilities will see the 8 cores, but not the miners, strange problem, however catalyst 11.6 seems to work fine other than the mouse bug.
This is using debian squeeze.
So how many gpu's do you run on linux then? That was the real point of the question. |
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For 50 dollars less you can pick up at 5770 and those easily get 200mhs. It seems 2mhs/1$ is a sweetspot.
I wouldn't call 2 megahash per dollar the sweetspot. The 5830 @ 130 gives you 2.4 if not 2.5 and the sapphire 5850 has been said to be able to do 400 easily with no over volt that's 2.76 megahash per dollar. The super good deal on the 5870 a week or two ago ($189) can easily give you 2.3. The 5770 can be a good deal but not at 100 if you can get one at 70 or 80 maybe. That's 2.86 but keep in mind all the parts in your server dilute the megahash per dollar value. The only way I think a 5770 build could work is if you could manage to squeeze 8 of them on a mobo but I havent done enough research on that to be positive. this is not true, non of my 5850 has been able to do 400mh/s on stock voltage overclocking. "easily" means most of them should be able to hit this speed, which is not true at all. this is only a few lucky good ones I don't think every 5850 can reach this but I've heard multiple times on this forum that the sapphire 5850 can easily reach this. It just depends on the brand. |
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Ok so I know the max amount of gpu's in windows is 8 that's not what I'm asking. I have seen multiple posts on this forum where there are rumors and people stating they have over 8 gpu's in one system running linux. Can any one actually prove this?
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Or you could get water cooling setup.
Im running 2 Antec KUHLER H2O 620. They were a bit noisy for the first 6 hours but now they dont make a sound since all the air bubbles are out of the pump.
I stated above I'm trying to penny pinch where possible lol This would hardly be penny pinching. |
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If you can measure the draw of that fan relative to the rest of the system you have some very sensitive equipment. i'm disspointed to see newegg doesn't have the 140 in stock anymore they used to have it boxed with the retail HSF for only a few dollars more. Edit: looks like we bought them all http://www.newegg.com/Product/Product.aspx?Item=N82E16819103698It's not that my system that I'm building is sensitive I'm just trying to penny pinch where possible. The cpu means jack shit when mining I'm trying to avoid all extra expenditures for it. |
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Wow. Literally every suggestion in here has been wrong. 900watts for 3x 5850s? lolz. Only run your PSU at 50%?  Here's a real rule of thumb: Get a quality PSU and run it up to 100% of its rated continuous power output. I heard a really good anecdote once -- Buying a cheap PSU is like buying a cheap condom. Seems fine until you have a blow out. For a mining rig, a quality gold rated PSU will literally pay for itself over say, a decent bronze rated psu, if running 24/7. I've become a bit of a fanboy of the seasonic X series, though they're not as cheap as they once were. You will likely be fine with an x650, though if you're super super paranoid you can go with say an AX750, such quality it is (and basically the same unit as the X750 with some minor alterations). Also sweet but too expensive is the NZXT Hale90, but looks awesome. Lower quality but still respectable units are the OCZ ZX series, Thermaltake ToughPower, FSP Aurum series, Enermax Pro87+ series, Lepa GXXX series. Not as good units but if you can find a bargain they'll generally be good enough. I'm currently running 2x5870s and 1x5850 on my seasonic X650 right now, as I recall it pulls something like 580Watts from the wall, full load overclocked. That's roughly 500Watts to the system, don't listen to anyone that tells you a 5850 is going to pull 200Watts from the PSU. A quality powersupply labelled "XXX Watts" can deliver XXX Watts to the system. Which means it can pull XXX + XXX*efficiency watts from the wall, and deliver it all day long 24/7. Now if you cheap out and get some no name cheapo-brand 10000 watt PSU, you might get enough watts, you might not, it might blow and with no OCP destroy your whole rig, or it might not, no one knows. I prefer to play it safe myself. EDIT: P.S. Corsair makes some very good units, but the GS series is basically their lowest quality, crappest piles of nonsense. Not recommended. After what he said I'd like to recommend this again http://www.newegg.com/Product/Product.aspx?Item=N82E16817139016 |
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I wouldn't run without the fan - if you want silent you'll want a much larger passive heatsink. I've got Sempron 140s underclocked to 800mhz and undervolted, the CPU fan is basically inaudible. It's certainly no where near the noise a desk fan and 6 GPU fans whirring at 100% make Yea the problem is its more money if I go for the bigger heatsinks I think I'm going to spend 3 dollars more and get this http://www.newegg.com/Product/Product.aspx?Item=N82E16835103075It looks like it's much easier to take the fan on or off so I can test if its possible without a fan. Another reason I don't want the fan is I want to make this as lean on electricity as possible. |
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