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Topic: ROI figures for a mining rig? (Read 1961 times)

hero member
Activity: 560
Merit: 500
November 09, 2011, 08:13:13 PM
#22
There is a great wiki article on what cards/cpus can generate in Mhash/s. All you need to do is google bitcoin mining gpu and it will be on the top of the list. It lists the prices in $/Mhash and even J/Mhash. From there you should be able to calculate cost/performance of any rig you would like to build. The number of possibly combinations would be too great to list and are dependent on local energy prices. To be honest if I wasnt in an apartment and had to pay for my electricity I probably wouldnt be mining. That being said my landlords charge enough and can suck it lol.
full member
Activity: 127
Merit: 100
November 09, 2011, 04:07:34 AM
#21
Saw this on reddit awhile back.

Lists all ATI models and you can sort on which statistic is the most important.

https://docs.google.com/spreadsheet/ccc?key=0AsSwOT3E1XTGdGtpa1BQcmJLN2x6TG1MRmxzb29BeFE&hl=en_US#gid=0



Brilliant. Just confirms the 5970 is the snizel Smiley

Thank you.

You are aware of this article right? https://en.bitcoin.it/wiki/Mining_hardware_comparison

I have pasted this link here so many times that maybe I should put it in the signature or something.

Yes, it's a great resource. Its fantastic to see information that corroborates that wiki document.

hero member
Activity: 602
Merit: 502
November 09, 2011, 03:23:30 AM
#20
Saw this on reddit awhile back.

Lists all ATI models and you can sort on which statistic is the most important.

https://docs.google.com/spreadsheet/ccc?key=0AsSwOT3E1XTGdGtpa1BQcmJLN2x6TG1MRmxzb29BeFE&hl=en_US#gid=0



Brilliant. Just confirms the 5970 is the snizel Smiley

Thank you.

You are aware of this article right? https://en.bitcoin.it/wiki/Mining_hardware_comparison

I have pasted this link here so many times that maybe I should put it in the signature or something.
full member
Activity: 127
Merit: 100
November 09, 2011, 03:13:17 AM
#19
Saw this on reddit awhile back.

Lists all ATI models and you can sort on which statistic is the most important.

https://docs.google.com/spreadsheet/ccc?key=0AsSwOT3E1XTGdGtpa1BQcmJLN2x6TG1MRmxzb29BeFE&hl=en_US#gid=0



Brilliant. Just confirms the 5970 is the snizel Smiley

Thank you.
member
Activity: 86
Merit: 10
November 08, 2011, 09:09:10 PM
#18
Saw this on reddit awhile back.

Lists all ATI models and you can sort on which statistic is the most important.

https://docs.google.com/spreadsheet/ccc?key=0AsSwOT3E1XTGdGtpa1BQcmJLN2x6TG1MRmxzb29BeFE&hl=en_US#gid=0

newbie
Activity: 5
Merit: 0
November 08, 2011, 07:41:36 PM
#17
Yeah, I'm sure the extenders would need to be powered, which is perfectly fine, but open air rigs can benefit greatly especially if you have limited space.

I know the power requirements would be huge, but since its a custom box, you can just mount 2 1200W PSU's in there no problem.

But still it would be cheaper using open air because at 16 GPU's (for sake of it working.) thats 1 mobo/ram/cpu and no case and probably 3 to 4 hundred in extenders. using all prebuilts, that is at least 3 mobos with cpu and ram and cases, so that right there is at minimum 450 bucks (thats on a mobo with 5 PCI-E slots) plus non powered extenders, it just adds up real quick. plus then you'd have to buy a third PSU (granted wouldn't need to be as strong, but still)

Granted this only works if your willing and have to know how to put the energy into fabricated a case on your own and have ample cooling for such said box.  I'd just like to do it cause it would be a fun project to figure out how to make it work, but alas I don't have like 5 grand to throw down on a mining rig at the moment.
donator
Activity: 1218
Merit: 1079
Gerald Davis
November 08, 2011, 08:48:48 AM
#16
I use this board...

pricey but at the time it was the one I found which supported 3x 5970 with a space between each one and no need for extenders.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274

CPU is a Sempron 145 (cheapest AM3 CPU.  Watch out for cheaper OEM models they have no fan)
RAM is any pair of DDR3 2x1GB sticks.  It doesn't really matter.  You probably could get away w/ only 1GB per board but honestly that is only saving you <$10.

PSU I go high end.  1200W Gold-80Plus.  Unless your electricity is free you really need Gold PSU to keep your electrical draw down.  In hindsight I likely could have gone w/ a 1000W model.   I pull 870W from the wall and at 90% efficiency that is ~800W DC.  I bought the 1200W in case I wanted to switch to extenders and go 4x5970 per rig. 
full member
Activity: 127
Merit: 100
November 08, 2011, 08:37:52 AM
#15
Thanks for all this really useful information. You've made my life so much easier Smiley

What motherboard/psu/processor/ram combo do you use?

Cheers and thanks again.
hero member
Activity: 742
Merit: 500
November 07, 2011, 06:37:19 PM
#14
I wish these calculators had a section to put the amount of money/BTC that you have already made.  I guess it's easy enough to subtract the amount made from the cost.
donator
Activity: 1218
Merit: 1079
Gerald Davis
November 07, 2011, 06:15:38 PM
#13
That is a very nice set up with the 5970's.  Just curious, would you happen to know how many of those cards a linux distro will recognize?  Because I have an idea in my head for a custom built box with 8 of those cards (16 GPU's if I'm not mistaken) that would pump out some serious Ghash/s (about 5 GHash/s on math, but we all know that doesn't always work.)

Just curious if you happened to know that off the top of your head.

I know from personal experience Linux supports 8 GPU.  I have heard from others that it supports 16 GPU but never tested it myself.  Just remember 8 5970 are going to consume ~ 2.1 KW plus another 100W or so for rest of system (CPU, RAM, MB, HDD, etc).  Board with 8 PCIe slots tend to be more expensive and you may need powered extenders because MB might not be able to deliver enough power to all 8 slots (The 5970 pulls about 30W through PCIe slot).  I found 2 smaller rigs to be more reliable and not much more expensive.  At best using a single board would save you about $200 (one MB, one CPU, one set of RAM) as the GPU and PSU are the expensive part.   However the cost of powered extenders, and more expensive board eat into those savings.  It would be cool simply from a "lets see how far I can push it" perspective.
newbie
Activity: 5
Merit: 0
November 07, 2011, 05:51:39 PM
#12
That is a very nice set up with the 5970's.  Just curious, would you happen to know how many of those cards a linux distro will recognize?  Because I have an idea in my head for a custom built box with 8 of those cards (16 GPU's if I'm not mistaken) that would pump out some serious Ghash/s (about 5 GHash/s on math, but we all know that doesn't always work.)

Just curious if you happened to know that off the top of your head.
donator
Activity: 1218
Merit: 1079
Gerald Davis
November 06, 2011, 09:47:38 AM
#11
I use the MSI 870FXA-GD70.  Likely there are cheaper boards which will work but I had one lying around and once I got the first 3x5970 rigs I simply copied it exactly 4 times.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274



full member
Activity: 127
Merit: 100
November 06, 2011, 06:11:52 AM
#10
Another option (in US) is used 5970s from ebay.

Used they go ~$330 - $360 ea.  3x9570 is ~2.2GH/s for ~$1000.
Throw in new MB, RAM, Sempron CPU, 80 Plus PSU, and USB drive for ~$300+.

Depending on your costs you are looking at $1300 to $1500 per rig.  The 5970 also has a nice efficiency.    I get 2.2GH/s for ~860W (at the wall).

Nice thing is no extenders are necessary if you use a motherboard with slots like this

--- PCIEx16
--- anything
--- anything
--- PCIEx16
--- anything
--- anything
--- PCIEx16

If you can't get 5970s cheap (which some international users have told me) then yeah it doesn't work but I have never had a problem getting them from ebay.  Sometimes stores will offer a deal to closeout inventor for $400 ea new.

hey mate, what motherboards do you use?
full member
Activity: 127
Merit: 100
November 04, 2011, 11:07:40 PM
#9
Another option (in US) is used 5970s from ebay.

Used they go ~$330 - $360 ea.  3x9570 is ~2.2GH/s for ~$1000.
Throw in new MB, RAM, Sempron CPU, 80 Plus PSU, and USB drive for ~$300+.

Depending on your costs you are looking at $1300 to $1500 per rig.  The 5970 also has a nice efficiency.    I get 2.2GH/s for ~860W (at the wall).

Nice thing is no extenders are necessary if you use a motherboard with slots like this

--- PCIEx16
--- anything
--- anything
--- PCIEx16
--- anything
--- anything
--- PCIEx16

If you can't get 5970s cheap (which some international users have told me) then yeah it doesn't work but I have never had a problem getting them from ebay.  Sometimes stores will offer a deal to closeout inventor for $400 ea new.

I'd love to know where to get these 5970s - if you know, please message me. I will buy quite a few.
donator
Activity: 1218
Merit: 1079
Gerald Davis
November 04, 2011, 03:36:48 PM
#8
Another option (in US) is used 5970s from ebay.

Used they go ~$330 - $360 ea.  3x9570 is ~2.2GH/s for ~$1000.
Throw in new MB, RAM, Sempron CPU, 80 Plus PSU, and USB drive for ~$300+.

Depending on your costs you are looking at $1300 to $1500 per rig.  The 5970 also has a nice efficiency.    I get 2.2GH/s for ~860W (at the wall).

Nice thing is no extenders are necessary if you use a motherboard with slots like this

--- PCIEx16
--- anything
--- anything
--- PCIEx16
--- anything
--- anything
--- PCIEx16

If you can't get 5970s cheap (which some international users have told me) then yeah it doesn't work but I have never had a problem getting them from ebay.  Sometimes stores will offer a deal to closeout inventor for $400 ea new.
hero member
Activity: 566
Merit: 500
November 04, 2011, 06:37:23 AM
#7
a sweet spot rig would be 5830's when you could have bought them for 110$ each, and any board you could cram 5+ into while running a 40$, single core cpu.

i have seen ~1400$ get you ~2.5Gh/s if done right.
full member
Activity: 127
Merit: 100
November 04, 2011, 06:06:46 AM
#6
Thank you everyone. I really appreciate the responses - there's most of the information I'm after.

Does anyone know if someone has put together a rig "sweet spot" database? IE most processing for the least amount of investment into the rig?

Smiley
hero member
Activity: 602
Merit: 502
November 04, 2011, 04:10:28 AM
#5
Has anyone done any figures with some standard ROI figures for an "average" mining rig?

A lot of calculations have been done. See this calculator for example http://tpbitcalc.appspot.com/
sr. member
Activity: 252
Merit: 250
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