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Kinetic915 (OP)
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June 03, 2013, 08:43:29 PM
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Hello all,

I've found the 7790 to have the best power vs hash ratio so far.  250 khash to 65 watts.  Any suggestions to another?
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Each block is stacked on top of the previous one. Adding another block to the top makes all lower blocks more difficult to remove: there is more "weight" above each block. A transaction in a block 6 blocks deep (6 confirmations) will be very difficult to remove.
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June 03, 2013, 08:46:50 PM
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Quote from: Kinetic915 on June 03, 2013, 08:43:29 PM
Hello all,

I've found the 7790 to have the best power vs hash ratio so far.  250 khash to 65 watts.  Any suggestions to another?

7950 - 640 kh/s @ 200W
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Kinetic915 (OP)
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June 03, 2013, 08:49:14 PM
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Quote from: af_newbie on June 03, 2013, 08:46:50 PM
Quote from: Kinetic915 on June 03, 2013, 08:43:29 PM
Hello all,

I've found the 7790 to have the best power vs hash ratio so far.  250 khash to 65 watts.  Any suggestions to another?

7950 - 640 kh/s @ 200W

Thats still not better then the 7790, and I also can only achieve 550 kh/s @ 250+ watts with a sapphire card.  Which card brand are you referring to?
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June 03, 2013, 08:49:43 PM
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Do you have the settings you are using?  I would love to get 640 @ 200 Watts  Embarrassed
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June 04, 2013, 07:12:07 AM
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You need to undervolt the card. My 200W 7950 runs 1030/1575MHz at 1.05/1.60V. The hash rate is 620k. TC = 24000, intensity = 19. If mining BTC, it would use less than 200W because I underclock memory as well.
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June 05, 2013, 02:17:00 AM
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Quote from: Kinetic915 on June 03, 2013, 08:43:29 PM
Hello all,

I've found the 7790 to have the best power vs hash ratio so far.  250 khash to 65 watts.  Any suggestions to another?

So it looks like the 7790 is the new 5830. That's pretty good if you have a ton of space.
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