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Title: Need input on new bitcoin rig with 4x7790 Post by: spinx on April 04, 2013, 09:45:31 AM Hi, im spinx from Sweden!
I have known about bitmining for some time now but never really botherd. Then yesterday i notice an articel about the increasing value of bitcoins. That made me interested :D I have access to "free" power at my place so powerconsumption is not really an issue at this stage. First of i want to know the answer to the obvious question "is it really worth it"? What are the main issues here? I also configured an idea of a bitmining rig, looks like this so far, please give me input! * 4 x SAPPHIRE RADEON HD7790 1GB PCI-E DVI/HDMI/DP * GIGABYTE GA-990FXA-D3 AM3+ ATX * AMD SEMPRON 145 2.8GHZ 1MB SOCKET AM3 BOX * CORSAIR 4GB DDR3 XMS3 INTEL I3/I5/I7 1333MHZ * CORSAIR CX 750W BRONZE ATX12V 2.3 PSU * Build my own open air case Total price in Sweden : 7500SEK = 1150USD. Data from blockchained.com mining profitability calculator:
Profitability Estimate
This estimates to a profit of 2156.24 USD for the first year after the hardware has been paid off. Is this a good number? I also found 7850's for about 200USD/pcs, maybe 4 of them would be better? Cheers! Title: Re: Need input on new bitcoin rig with 4x7790 Post by: lbr on April 04, 2013, 09:52:45 AM Is 7790 available in Sweden?
Can you point me to the store plz? Title: Re: Need input on new bitcoin rig with 4x7790 Post by: spinx on April 04, 2013, 10:10:47 AM Is 7790 available in Sweden? Can you point me to the store plz? There are several shops who has them, but the most reliable one is DustinHome http://www.dustinhome.se/product/5010675358/sapphire-radeon-hd7790-1gb-pci-e-dvi-hdmi-dp/ Title: Re: Need input on new bitcoin rig with 4x7790 Post by: lbr on April 04, 2013, 10:14:03 AM Is 7790 available in Sweden? Can you point me to the store plz? There are several shops who has them, but the most reliable one is DustinHome http://www.dustinhome.se/product/5010675358/sapphire-radeon-hd7790-1gb-pci-e-dvi-hdmi-dp/ Probably 7790 is too 'hot' now) Title: Re: Need input on new bitcoin rig with 4x7790 Post by: spinx on April 04, 2013, 10:18:22 AM Is 7790 available in Sweden? Can you point me to the store plz? There are several shops who has them, but the most reliable one is DustinHome http://www.dustinhome.se/product/5010675358/sapphire-radeon-hd7790-1gb-pci-e-dvi-hdmi-dp/ Probably 7790 is too 'hot' now) The RSP for 7790 in Sweden is 199USD (1299SEK) so this price of 1295 is spot on. I dont know where u live, but in Sweden the RSP is always about +25% compaired to US. The cheapest price in Sweden atm is 186USD and i dont think it will drop that much in the near future. I found that there are 7850's selling for 200USD here, they consume abit more watt's but as thats not a concern for me, the benefit of 30-40% more calculating power might be a good investment? Title: Re: Need input on new bitcoin rig with 4x7790 Post by: litecoin_messiah on April 04, 2013, 10:43:10 AM do you think "CORSAIR CX 750W BRONZE ATX12V 2.3 PSU" will be enough for 4 graphics cards?
Title: Re: Need input on new bitcoin rig with 4x7790 Post by: spinx on April 04, 2013, 11:01:45 AM do you think "CORSAIR CX 750W BRONZE ATX12V 2.3 PSU" will be enough for 4 graphics cards? According to guru3d the 7790 has a "Subjective obtained GPU power consumption = ~ 90 Watts" http://www.guru3d.com/articles_pages/radeon_7790_review_benchmark,6.html Numbers from guru3d's review: System Wattage with GPU in FULL Stress = 179W + 3 x 90W = 270W = 449W 449W = 60% utilization of 750W , so i guess thats allright with the 7790's? Title: Re: Need input on new bitcoin rig with 4x7790 Post by: Ledningen on April 04, 2013, 12:59:52 PM Why not get a 6950 used if you can find it? 420 ish hash rate and it's cheap. Or 2x 7950 that will do 1.2+ Gh/s. @ 160watt pr. card.
If you dont pay for power, get the most hashrates you can. A 7950 will also be much more easy to sell again in the future, at a reasonable price point. Title: Re: Need input on new bitcoin rig with 4x7790 Post by: spinx on April 08, 2013, 11:34:14 PM Why not get a 6950 used if you can find it? 420 ish hash rate and it's cheap. Or 2x 7950 that will do 1.2+ Gh/s. @ 160watt pr. card. If you dont pay for power, get the most hashrates you can. A 7950 will also be much more easy to sell again in the future, at a reasonable price point. Greate idea :D just ordered a new system --> 4 x Radeon HD 7950 OC https://bitcointalk.org/index.php?topic=169841.msg1765919#msg1765919 |