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Author Topic: What do you guys think of this rig?  (Read 4124 times)
d3c0n808
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May 24, 2011, 11:21:02 PM
 #41

Perhaps you bought your equipment already but I thought I would throw my .02 in here as well.  Everyone has given you great advice.
I have an asrock 890gx extreme 4 board and a sempron 145 with stock cooler.  There is really no need for a 890fx or a high end board.  The asrock has onboard gpu which is nice because your not stealing resources from your mining cards to run the GUI.  So running f0 flag on poclbm is no problem.  The board i think can be had for 140 bucks and has 3 pcie 2.0 slots. and 1 pciex1 slot so theoretically you can stick 4 cards in there with the help of a pcie to pciex16 converter.  The single core sempron can be unlocked depending on the cpu so its a 50/50 that you can get dual core but as it is with 3 cards running poclbm the cpu isn't even taxed.  You can get away with 1gb for linux i prefered 2 an at 30 bucks for 2gb thats no biggie.  a 1000 watt psu can be had for less than 100 bucks now a days depending on how many cards you intend to run.  Make sure if your running 4 cards in one case that you have GOOD fans, unless your going water cooling.  I have 2 delta 250cfm fans for my cards as they run pretty hot overclocked, and at 500cfm they both run at about 68C.  If your going to running windows make sure you have a dummy card for each gpu otherwise windows will not recognize the cards(this is not a problem in linux) Also there are some excellent tutorials on how to mine with linux.  Windows tends to be less stable and a little slower at least in my experience the linux machines hash much more consistently where as my windows machines has a lot of fluctuation. I'm sure some people will disagree.   When I say excellent I mean its just a matter of copy and paste commands into a terminal and I'm sure there are a lot of people that would be more than willing to help you setup any scripting. 

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xenon481
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May 24, 2011, 11:27:12 PM
 #42

Looking like next difficulty jump may be closer to 100% than 50%...
http://forum.bitcoin.org/index.php?topic=9723.0

The current expected difficulty increase is ~67%. I expect that to go up a little more, but it shouldn't come anywhere close to 100%.

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DarkKnightNomeD
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May 25, 2011, 12:54:00 AM
 #43

Paying anything over $0.75 per MHash/s is a losing proposition and anything just under that isn't worth the risk.

For 1,200 MHash/s, you would need to try to spend less than $800 (preferably less than $750 to reduce risk).

Unfortunately, 4x 5850 alone costs over $700.

And as far as CPU goes, a Sempron is overkill.

check this out

http://www.youtube.com/watch?v=G5f_e4P6gMA


he says hes getting around 32Ghash
bitlock
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May 25, 2011, 02:29:41 AM
 #44

My solution is to stick a HD5830 or similar card in an old pc (3-4 years old) with no harddrive, maybe 1gb ram (whatever it has), upgrade the power supply, and run the system off linux on a USB stick....about as cheap as it can get for me....
...until the bitcoin return and heat become unbearable....

You never know, some genius might be able to double or triple the throughput on these GPU's....then it's game on again...
Gameover
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May 25, 2011, 03:42:30 AM
 #45

My solution is to stick a HD5830 or similar card in an old pc (3-4 years old) with no harddrive, maybe 1gb ram (whatever it has), upgrade the power supply, and run the system off linux on a USB stick....about as cheap as it can get for me....
...until the bitcoin return and heat become unbearable....

You never know, some genius might be able to double or triple the throughput on these GPU's....then it's game on again...

only if you are that genius and keep it to yourself, otherwise the whole community will double or triple, making the increase meaningless at the next difficulty update
SchizophrenicX
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May 25, 2011, 05:24:36 AM
 #46

Hey how do I use the PCIe x1 slots for the GPU? Is there some kind of adapter? Or is it simply not possible?

d3c0n808
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May 25, 2011, 08:11:04 AM
 #47

Hey how do I use the PCIe x1 slots for the GPU? Is there some kind of adapter? Or is it simply not possible?

http://forum.bitcoin.org/index.php?topic=6128.0

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SchizophrenicX
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May 26, 2011, 03:38:46 AM
 #48

Hey how do I use the PCIe x1 slots for the GPU? Is there some kind of adapter? Or is it simply not possible?

http://forum.bitcoin.org/index.php?topic=6128.0

Hi d3c0n808, thanks for point me in the right direction. I'll see if my local store has got these. It'll drive down the cost of my build by a huge margin.

d3c0n808
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May 26, 2011, 07:20:26 AM
 #49

Hey how do I use the PCIe x1 slots for the GPU? Is there some kind of adapter? Or is it simply not possible?

http://forum.bitcoin.org/index.php?topic=6128.0

Hi d3c0n808, thanks for point me in the right direction. I'll see if my local store has got these. It'll drive down the cost of my build by a huge margin.

You might as well maximize what hardware you already have and use these vs buying a new board for every 2 or 3 new cards....poclbm doesnt use much cpu resources so a amd 4000+ should have no problem even if you only have pci slots....those can be adapted for hashing and as its been discussed the bandwidth reduction doesn't mean much mayb 10 mhash which is alot cheaper than buying a new board, new psu, etc etc

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