How can you possibly get 1500 MH/s for $1,000? I would love to see where to buy this setup. In fact, I will take 5 completed systems if you can do it at that price.
There's a ton of ways you could achieve this but I'm too lazy to look up specific numbers. People above me have the right idea. So let me get this right: step 1) buy 4 video cards that are not readily available, and the ones that are easily exceed your claimed "price" (at least 200 a piece) step 2) buy 1250 Watt PSU, 4 PCIx MOBO, processor, RAM under $420  Step 3) profit! Foolproof. I want to start by reposting what I said earlier. I feel its safe to say any frugal miner can build a machine for 1.5 megahash per dollar.
Next I want to say the 5850 consumes a lot less power then a 5830. My 4x5830 set up consumes 888 watts so a 1000 watts for 4 5850's isn't out of the question. A 4 pcie mobo can be picked up for less then 100 dollars easily and a cpu only costs 30-40 ram is 10 so its extremely do able. |
|
|
|
Your advice is generally sound. People paying more for electricity (25c/kwh) will get out much sooner than those paying 10c.
I agree people who pay 25c/kwh will definitely see an end to serious profits soon. However people can still make good money off mining as long as they don't live in an area with hugely expensive electricity. I feel its safe to say any frugal miner can build a machine for 1.5 megahash per dollar. Lets say they invest $1000 dollars today thats 1500 megahash. Lets double the difficulty just for the hell of it. I doubt it will get to 3,780,724 any time soon especially if the price drops any more but I feel like no one will argue if I am more then fair. At that difficulty you would make .4 btc. Lets say the price stays around 12 dollars (if the price drops more I highly doubt even more then this I highly doubt we will reach 4 mill diff) thats 4.8 dollars a day before electricity. 1500 megahash would probably require about 1kw. If you don't agree I measured my watts used for 4 5830's and its ~888 and that gives me 1320. At 1 kw and 10c/kwh it would cost 2.4 a day. That means 2.4 dollars a day in profit which is 72 a month. 72 dollars a month may not sound too great but thats months down the road and by then any hardware bought now should be easily paid for. |
|
|
|
|
I wont lie when I read the subject I was expecting a post from angelus lol.
|
|
|
|
move clocks to 1030/350 your card might not be able to handle this if thats the case lower the card to 1025 then to 1020 ect until stable. next aggression=12 and use this phatk mod https://bitcointalk.org/index.php?topic=7964.0I might have done a few other changes but this is all I remember at the moment. If you do this you should get speeds of around 333. |
|
|
|
|
I want to preface this with the fact I know how to overclock cards I've been doing it with my 5830's for a month and a half.
So I recently picked up the 5850 from ncixus and they arrived yesterday. One thing I noticed is if I drop the memory to around 300 the card start acting up and becomes unstable. I've seen multiple time people who have 5850's recommend this speed?
Another thing thats weird is if I go to 970 core clock or above the system freezes the moment I hit apply. The reason I ask is because when my 5830's get overclocked too high the drivers just crash but it doesn't freeze the entire system. Do the 5850's just act different when overclocked?
I assume all this means is that I can't get stable overclocks over 970 but the cards are acting strange compared to my experience with 5830's.
|
|
|
|
With all else equal, 6990.
1) resale value if you ever want to dump it.
2) higher hashrate on the 6990, a quick look at the hardware comparison shows ~100MH in favor of the 6990
~600 (5970) vs ~700 (6990) at stock clocks
I haven't looked at power consumption numbers to say if that makes enough of a difference to make up for 100MH, but it'd have to be significant.
They also are pretty even at top overclock on that site. Honestly these cards aren't too great unless you get them for around 500(which you won't) so in order to even get close to a good megahash per dollar value you have to overclock. |
|
|
|
1.7 BTC shipped anywhere in the USA. All from newer sets released within the last year or so. Bitcoin address: 14k5JXvZQ5Evwu1BTvzC6M9HzX5tMagTTt. Will ship via USPS.
I doubt any one would buy mana its practically worthless and people who play magic tend to have an unlimited supply of it. |
|
|
|
evga.com? Only sells nvidia gpu.
I should have been more specific I meant mining cards like radeon 5xxx and 6xxx |
|
|
|
EG., even if you get 5830s (@ 350mh/s) for $150 you're still not there: 350/150 = 2.33.
Dunno where you got 350 megahash for a 5830 but I highly doubt thats possible. I remember seeing 340 and that was a super heavy overvolt and I highly doubt that is sustainable for long periods of time if you don't want your card to fry. |
|
|
|
|
Hey all I'm thinking about writing a program and it would require as many reputable websites that sell 5xxx and 6xxx cards as possible. My current list includes
newegg
tigerdirect
ncixus
amazon
superbiiz
Are there any other good sites out there?
|
|
|
|
Be careful. Make sure you understand that your 3mh/$ may end up costing you more in electricity.
It's a perfectly reasonable plan (eg., building rigs on the cheap). I do it all the time. Just make sure you know what you're getting into in the intermediate term (eg., six to twelve months out).
Just look at your electric bill and see how much you're paying in kw/h. Then pick up a cheap "Kill A Watt" or some other meter so you can tell how much your rig is pulling current-wise.
Then get jiggy with some spreadsheets which hopefully include some kind of sensible forecast for BTC price and mining difficulty level.
care to clarify how you get 3 mh per dollar invested in rig? The best I've ever heard is 2.25 from deslok in this thread. |
|
|
|
|
They are basically the same 5970 is slightly better on electricity. I'm not sure what the upper limit is for each card now a days but I'm sure they are fairly equal.
I'd also like to point out that a 5970 has less of a demand then a 6990 because games want the latest card as well so you'll most likely find a 5970 for cheaper.
|
|
|
|
Your running 4 cards on the foxconn mobo by using PCI to PCIE16 adapters and pCIE1 to PCIE16 adapters? No issues in getting software to recognize any of it? If heat wasn't an issue could you run 4 6990s in it or was my local computer shop right that better cards must have good mobos and processors in order to work??
If you want high megahash per dollar your looking in the wrong place by choosing a 6990. Depending on how much you pay they tend to give 1-1.25 megahash per dollar before you even add the other parts into the cost. Most 6990 builds tend to be less then 1 dollar per megahash after you include the parts. |
|
|
|
I appreciate the quick reply and feedback, your right I could have explained it better
Basically accounting for all hardware needed to get something working is there any setup that's 3MH/$ invested?
I'm almost 100% positive that you can never get the 3MH per server. The reason I say this is because the most cost effective card I've ever seen is a 5830 @ $110. That will give you 3 megahash per dollar but becomes diluted the moment you add other costs. You will not find multiple 5830's for less then 110 because it is in such high demand. Machines like the one deslok bought wont come up on the market very often because he had to find really good deals on the 5770's and a super cheap computer that could handle them. The max you should expect out of completely new parts is 1.5 megahash per dollar and if you wait to find sweet bargains on craigslist ect expect 1.5-2 |
|
|
|
You should push the overclock to where you feel comfortable most 58xx cards are ok between 975-1025 mhz easily but it does vary card to card. I set myself a target of 1ghz on each card which is normally easy enough to each with little more than a mild voltage increase. be careful of your temperatures and keep in mind you may not be able to reach the highest listed speeds on the compairson chart with every card.
Be very careful when messing with the voltages that can seriously mess up your cards if you blindly change the amount. When it goes to changing the core clock you'll probably be fine trying the high end (around 1 ghz) and if it crashes lower the clock. A couple driver crashes aren't going to do serious damage to the card. |
|
|
|
yes it is although it might not be possible building from new. I purchased an old tower on CL for 45 and 2x5770 for 150 it's running at 440mh/s for the past few days so i've managed 2.25mh/$
That's a very good deal you got  I agree though I highly doubt you can pull off 2+ with new. Another thing I'd like to point out though is that I doubt you could get a pc with over 1000 megahash used and still get 2mh/dollar. Once you get to that point you'll be needing high end psu and mobo's and those probably wont come too cheap. |
|
|
|
Hi all.
I have been playing around with overclocking my cards, 2x5850 1x5870, but I'm not sure I'm doing it right.
My 5850's are clocked at 885/300 and spit out around 366mh/s, I think that's not too bad. The 5870 on the other hand, I have a feeling Im not pushing enough. It's currently clocked at 910/300 and spitting out ~412mh/s. When reading up on other people's results, I noticed that different memory speeds are used, generally between 300-350, how does the core clock correlate to the memory clocks?
How much should I push a card? It may seem as a stupid question, but other than BSOD's, freezing up, rebooting the pc, is there things that can indicate unstable OC? Noticed at higher clocks my miner restarts more often, but to be honest I cannot rule out that it's simply something with the internet-connection between me and btcguild (Im in Europe). Higher overclocks also gives me higher stale counts, can raising the memory speed decrease those? The system itself does not hang or anything, so that is why I'm not sure if the cards are pushed enough. Should I just overclock till the system restarts, shows visible graphic errors, etc, and then set the core clock down like 5-10mhz?
I am using Windows 7 32bit, AOCLBF 1.75, Phoenix 1.5 with the 07-17-11 kernel, AMD 11.7 with included SDK.
Motherboard Asus P5K, C2D e6850 (or e6750, can't recall atm) 2x1gb RAM, Wireless network card (could that mess with my stale share count/miner restarts?)
Two Sapphire Xtreme 5850's and one XFX 5870 HD-587X-ZNFV.
Any help would be greatly appreciated.
I want to start out by saying I won't have my first 5850 until Wednesday so I can't really help with specific clock numbers. I know the 5830's best memory clock is 350 any more then that does nothing any less the megahash starts to drop. You just need to look up what people are saying for memory for the 5850 and test going up and down seeing where the sweet spot for your card is. The reason you drop the memory is because you get nothing extra from from the memory being so high. By lowering the memory you'll make the card run cooler, it will consume less electricity and as a side effect of the lowered heat allows you to push the core clock higher. Each 5850 and brand of 5850 is different my suggestion is find what seems to be the average overclock speed(that is higher then what you have now) and try it. If the drivers crash or the heat is too high lower the core clock a little until its at a safe temp. Did I miss anything you wanted answered? |
|
|
|
It's no promise of 3MH /$1 per single rig, but per card it is.
Is it even possible to get over 2MH/$1 per rig? I've done a lot of theoretical builds and if you want any realistic build it usually tops out around 1.5 megahash per dollar. mine is in the mail already, it was like 145 and 15 bucks shipping
The 5 I got come Wednesday  |
|
|
|
|
Ah I hoped bulk buying was a lot cheaper :s
|
|
|
|
|
I'm not 100% sure what your asking but I don't think there are any cards that run on pci? If your talking about pci to pcie converters I've found that they are too expensive to be worth your time. As for cards there have been 5830's that sold for $110 and I could get 330 megahash out of them. Thats 3 megahash per dollar.
Is that what your asking?
|
|
|
|
|
Show Posts
